bluuebunny/crossref_metadata_2025 huggingface dataset:
Preparation and Adsorption Property of Modified Activated Carbon for Purification of HCN in Closed Carbide Furnace Tail Gas
Authors: Jiang Ming , Ning Ping , Wang Zhong Hua , Bai Yang Wei , Chen Wei , Zhang Wei , Wang Rui Bo
Published: February 2012

For utilization of CO contained in tail gases of coal chemical industry, adsorption purification of HCN in closed carbide furnace tail gas was investigated on an activated carbon was modified with KOH (AC1) and the other activated carbon was modified with NaOH and sulfonated cobalt phthalocyanine (AC2). The experiment results show that two kinds of modified activated carbons are proved to be effective adsorbents for HCN removal, but the HCN adsorption capacity for AC2 is 1.47 times that for AC1. For AC2 adsorbent, the purification efficiency increased with the increase of oxygen content and adsorption temperature. The results show that, 1.5% for optimum oxygen content and 90°C for optimum adsorption temperature. The specific surface and the pore structure properties of AC2 adsorbent before and after HCN adsorption were tested by N2 adsorption experiments. The N2 adsorption tests show that, the predominant adsorption of HCN occurs in the micropores in radius 7.4～16.6 Å. Deactivated AC2 adsorbent could be restored to the original activated state, even after several regenerations.
Effect of Alloy Addition on Mechanical Properties and Decarburization Sensitivity of Spring Steel
Authors: Tian Jun , Xue Shun , Cheng Guo Guang , Chou Kuo Chih
Published: February 2012

The mechanical properties and decarburization layer depths after heat treatment have been investigated for the experimental steels，which were melted by means of 10Kg vacuum induction furnace in the laboratory . It has been confirmed that additions of silicon and vanadium can improve strength of the steels and, the tensile strength of the steels increases with silicon content from 1.4% up to 2.0%. The reduction of carbon content and the addition of carbide forming elements decrease the decarburization sensitivity of the steels tested. The tensile strengths of the steels with carbon less than 0.5% are between 1016.88 to 1674.64 MPa, and the impact energy between 15.50 to 34.50 J, which are compared with the tensile strength of 1160.89MPa, the impact energy of 19.00 J for 55SiCrV. The steels with optimized compositions, which consists of 0.4~0.5% C, 1.6~2.0% Si, 0.8% Cr, 0.2% V, have a satisfactory property with high strength, high toughness and good anti-decarburization.
Study on the Photocatalytic Degradation of Diesel Pollutants over a Sol-Gel Prepared TiO2
Authors: Yu Xiao Cai , Hu Dong Dong , Du Qian , Zheng Xv , Guo Ji Yao
Published: February 2012

Nanoscale titanium dioxide (TiO2) has been fabricated through a sound sol-gel method at room temperature with Tetra-n-butyl Titanate as the precursor, and the particles are characterized by XRD and TEM techniques. The results manifest that the as-prepared TiO2 is amorphous with the anatase structure and its size is around 33.2nm. Five factors, including dosage of TiO2, initial concentration of diesel, pH value, photocatalytic degradation reaction time and the presence of H2O2, are considered in the diesel degradation experiments. An orthogonal test is carried out to optimize the photocatalytic degradation of diesel pollutants based on the single-factor experiments. It reveals that when the dosage of TiO2 is 1.0g/L, the initial concentration of diesel is 0.5g/L, pH value is 6, the reaction time is 4h and the H2O2 dosage is 0.09%, the removal rate of diesel pollutants can up to 88%. Besides, the influence of each factor on removing diesel can be arranged in decreasing order: initial concentration of diesel> photocatalytic reaction time> pH value> TiO2 dosage> H2O2 dosage.
Smelting Cleaness Control of Supercritical Rotor Steel 30Cr2Ni4MoV
Authors: Lin Teng Chang , Zhu Rong , Xing Wei , Zhou Xin , Liu Wen Juan , Lv Ming , Shen Bing Zhen
Published: February 2012

The cleanness of 30Cr2Ni4MoV steel was researched by chemical analysis, SEM and electrolytic experiment. The results show that the large-sized inclusions in the casting is the direct reason for the product to scrap. It found that there is a increase trend of large-sized inclusions and oxygen content from VD to pouring process with a cleanness detection of smelting process. It have achieved a good effect by adopting some measures to improve steel cleanliness which includes controlling the carbon content of EAF tapping reasonablly, low melting point controlling of inclusions, extending soft blow time and optimizing the flow field of tundish. The quantity of inclusions has reduced from 38.8 per square millimeter to 16.0 per square millimeter. The oxygen content has reduced from 58 × 10-6 to 32 × 10-6, and the nitrogen contents has reduced from 85 × 10-6 to 70 × 10-6 after process improvment.
Preparation of Visible Light Response K6SiW11O39SnII for Photocatalytic Degradation of Acid Brilliant Scarlet
Authors: Zhu Xiu Hua , Liu Jia Huan , Zhao Li Li , Wang Peng Yuan
Published: February 2012

Environmental friendly materials, K6SiW11O39SnⅡ(abbreviated as SiWSn), was synthesized, which is visible light response photocatalyst. The photocatalytic decomposition of Acid Brilliant Scarlet (abbreviated as ABS) aqueous solution with SiWSn was investigated using a broad spectrum of solar radiation. The results showed that the photocatalytic degradation efficiency of ABS with SiWSn was affected by the initial pH of ABS solution, the amount of SiWSn and the photolysis time. When the initial pH of ABS solution was 5, the initial concentration of that (20mL) was 3mg L-1, the concentration of SiWSn was 1.25g L-1, and it was irradiated 4h under the sunlight, the discoloration rate of which was 71.4%.
Clamping Deformation Analysis Research Based on a Flexible Clamping Fixture of Thin-Walled Curved Surface Parts
Authors: Qu Li Gang , Liu Hai Bin
Published: February 2012

According to the space surface positioning principle, in this paper, to the practical need for clamping of the thin-walled curved surface parts as the background, the principles and methods of the production of flexible positioning surface are studied and a flexible clamping fixture is designed. It also elaborated the general flow of deformation analysis to the gripping parts with ANSYS. In addition, it analyzed the gripping deformation of the known surface parts, and validated the deformation index of the clamping fixtures.
Path Optimization in Hull Part Cutting Based on Seven Bridges Problems
Authors: Wu Jun Jie , Ji Zhuo Shang , Chang Hui Qing
Published: February 2012

Generally the process of hull part cutting is that the part can not be cut until the previous part has been cut. This mode is poor cutting efficiency and high cutting cost. Based on the famous Seven Bridges Problems, this paper models the cutting problem and then presents a brand-new cutting technology, the bridge cutting. In this technology, only one pierce point is enough to cut off all the parts that lie in the same level. The example shows that the technology is effective for reducing the numbers of pierce points and shortening the length of idle cutting path, which not only improves the cutting efficiency but also saves the cutting cost.
Preparation and Characterization of a Bio-Composites Scaffold Containing Nano-Hydroxyapatite /Carboxymethyl Chitosan
Authors: Lu Zhi Hua , Zhao Dong Mei , Sun Kang Ning
Published: February 2012

In this study, a genipin cross linked scaffold containing nano-hydroxyapatite (n-HAp) and carboxymehthyl chitosan (CMCS) was developed by freeze drying technique. The scaffolds were characterized using FTIR, XRD and SEM. The cytotoxicity of the scaffolds was compared with scaffolds cross linked by glutaraldehyde, and the Young’s modulus was also tested. FTIR and XRD results indicated that CMCS’s hydroxyl group, amino and amide regulated the n-HAp crystallization process, which results in the nano homogenous distribution of n-HAp and provided nano topographical features for nanohybrid scaffolds. SEM images revealed the scaffolds had porous structure and the pores were interconnected with an average diameter of 150 μm, which was profit for the growth of tissues. Cell morphology showed the genipin cross linked scaffolds had less toxicity and more facility for adhesion and proliferation of cells. Great mechanical properties of the scaffolds indicate their potential use in bone tissue engineering.
Fabrication Methods of Porous Tantalum Metal Implants for Use as Biomaterials
Authors: Chen Chang Jun , Zhang Min
Published: February 2012

Porous tantalum; biomaterials; bone ingrowth; laser cladding; Abstract. Porous tantalum, a new low modulus metal with a characteristic appearance similar to cancellous/trabecular bone, is currently available for use in several orthopedic applications (hip and knee arthroplasty, spine surgery, and bone graft substitute). The open-cell structure of repeating dodecahedrons is produced via carbon vapor deposition/infiltration of commercially pure tantalum onto a vitreous carbon scaffolding. This transition metal maintains several interesting biomaterial properties, including: a high volumetric porosity (70-80%), low modulus of elasticity (3MPa), and high frictional characteristics. Tantalum has excellent biocompatibility and is safe to use in vivo as evidenced by its historical and current use in pacemaker electrodes, cranioplasty plates and as radiopaque markers. The bioactivity and biocompatibility of porous tantalum stems from its ability to form a self-passivating surface oxide layer. This surface layer leads to the formation of a bone-like apatite coating in vivo and affords excellent bone and fibrous in-growth properties allowing for rapid and substantial bone and soft tissue attachment. Tantalum-chondrocyte composites have yielded successful early results in vitro and may afford an option for joint resurfacing in the future. The development of porous tantalum is in its early stages of evolution and the following represents a review of its biomaterial properties and fabrication methods for applications as implant biomaterials.
Effects of Water Vapor on the Oxidation Behaviors of Cr-Al-N Coatings
Authors: Zhu Ming , Wang Zhi Hua
Published: February 2012

Cr1-xAlxN coatings with different aluminum content were deposited on K38G alloy by reactive magnetron sputtering method. Oxidation behaviors of these coatings were investigated at 1000°C in air+10 vol.% water vapor. The surface morphologies and the microstructure of the oxide scales were analyzed by SEM and XRD, respectively. The results showed that the oxidation of the Cr1-xAlxN coatings in the wet air also obeyed the parabolic law; however, compared to that in the dry air, existing of 10 vol. % water vapor increased the parabolic rate constants of the coatings. It was believed that the accelerating of the oxidation rates was owing to easily outwards diffusion of Cr through the looser and coarser oxide scales formed on the surface of the coatings when oxidized in wet air.
Preparation of Spherical Nanometer ZrO2 Reunion Powders via Single Emulsion Assisted with Homogeneous Precipitation
Authors: Du Kuan He , Chang Ying , Zou Jin Fang , Zhu Qin Biao , Dong Shi Jie
Published: February 2012

The water droplets in the microemulsion system of xylene/water/Span-80 can act as a micro-reactor which solubilize Zr(NO3)4, Y(NO3)3, and dimethyloxalate. The homogeneous precipitation reactions will take place in the restricted spaces determined by the droplets size. The micro-reactors help us obtain spherical nanometer ZrO2(Y2O3) reunion powders successfully. The spherical nanometer ZrO2(Y2O3) reunion powders and the precursor powders were characterized by means of TG-DTA, XRD, SEM and laser particle analyzer. It was investigated that the effect of Span-80 concentration on morphology and crystal phase composition of reunion powders. The result shows that as the volume ratio Vxylene:VSpan-80:Vwater= 40:1.0:8, the well spherical and excellent dispersion reunion powders with size of 4-16um were prepared after the precursor powders were sintered at 600°C for 2h. The Span-80 concentration has no effect on the crystal phase composition of reunion powders, however, has significant effect on the morphology of reunion powders.
Structural Characteristics of a New Original Bamboo Structure Composite Boards
Authors: He Chuan , Wang Ji Yuan , Zhao Lei Feng , Liu Yu
Published: February 2012

This paper introduces a new bamboo wood composite board structure, which board uses little diameter class bamboo as raw material. Bamboos cut into segments and remove part of the bamboo surface from double sides or four sides. Make the bamboo segments have two or four smooth surfaces. Through arrange the bamboo segments reasonably, minimize the impact of differences in bamboo segments straightness to the bamboo wood composite board. And then rolling brush the smooth bamboo segments surfaces with adhesive. Gluing between the bamboo segments from left and right sides and gluing bamboo segments with fiberboard from top and bottom sides. After the hot pressing and cutting edges, the bamboo wood composite board shaping.
The Study on the Reverse Atom Transfer Radical Polymerization of MMA Catalyzed by Acetylacetonate Cobolt(II) Complex Supported by Ionic Liquid
Authors: Cai Jian , Chen Tao , Wang Guo Zhen , Gao Jie , Ma Rui , Yan Chun Jie
Published: February 2012

An ionic liquid supported catalytic system, chloromethylimidazole acetylacetonate Cobolt(Ⅱ) was successfully used in the RATRP of methyl methacrylate. The chemical structure of obtained PMMA was confirmed by FT-IR and 1H NMR. The polymerization process in the presence of ionic liquid was thoroughly investigated. The results revealed that this kind of initiator and catalyst system could promote RATRP of MMA with the desired characteristics, and the RATRP proceeded in a controlled manner as evidenced by kinetic studies.
In Situ FT-IR Studies on the Catalytic Reaction of Isophorone Diisocyanate with Benzyl Alcohol
Authors: Yang Peng Fei
Published: February 2012

Benzyl alcohol is used to react with isophorone diisocyanate at different temperatures. Dibutyltin dilaurate is used as catalyst. In-situ FT-IR is used to monitor the reaction to work out rate constant, Arrhenius equation and Eyring equation. The urethane reaction has been found to be a second order reaction, and the rate constant seems different between initial stage and final stage. The activation energy (Ea), activation enthalpy (ΔH) and activation entropy (ΔS) for the urethane reaction of different isocyanates groups are respectively calculated out, which are very useful to reveal the reaction mechanism.
Effect of Shear Intensity on Structure and Properties of PA1010/CaCl2 Composites
Authors: Lu Sheng Jun , Gan Hua Hua , He Min , Hu Zhi , Yu Jie
Published: February 2012

The research focused on the effect of shear intensity on the crystallization process and the properties of the PA1010/CaCl2 composites which were prepared through melting extrusion. The results showed that, the interplanar distance, the crystallinity and the wavenumbers all had an extreme value when the screw speed was 240r/min. With the increasing of the shear intensity, the complexation between PA1010 and CaCl2 increased first and then decreased. The tensile strength and the heat distortion temperature of the samples increased first and then decreased, and the melt index decreased first and then increased, when the screw speed changed from 160r/min to 320r/min. All of them had an extreme value when the screw speed was 240r/min. The tensile yield strength, the flexural strength decreased with increasing of screw speed, and increased slightly or tended to a fixed value when the screw speed was more than 280r/min. The Izod impact strength rapidly decreased from 62MPa to 40.3MPa when the screw speed changed from 160r/min to 240r/min, then increased slowly with increasing of the shear intensity. The appropriate screw speed of the large-scale continuous production for the PA1010/CaCl2 composites was from 200r/min to 240r/min.
Application as Papermaking Organic Particulate Retention Agent of Cationic Polymethyl Acrylate Emulsion in Bleached Wheat Straw Pulp
Authors: Ma Yong Sheng , Wang Lin Tong , Sun Xian Hui , Chen Yun Fa , Liu Zeng
Published: February 2012

Cationic polymethyl acrylate emulsion which was prepared with no soap emulsion polymerization was used in bleached wheat straw pulp as papermaking retention agent. The main influence factors on retention effect, such as dosage of polymethyl acrylate emulsion, pH value of the bleached wheat straw pulp, reaction time after adding the polymethyl acrylate emulsion and stir velocity were discussed in detail. Experimental results showed that optimal application conditions were that first step was adding cationic emulsion which dosage was 0.64% relative to dry fiber, stir velocity was 1400r/min, 90s for reaction, second step was adding anion components which dosage was 0.16% relative to dry fiber, stir velocity was 750r/min, 60s for reaction, pH value was 4.5~5.0. The cationic organic particles system has good retention aid effect which one pass retention was 96.4%.
Preparation and Characterization of a Novel Mixed Functional Cationic Exchange Copolymer Microsphere as Drug Carrier
Authors: Wongsermsin Kaewnapa , Opanasopit Praneet , Ngawhirunpat Tanasait , Akkaramongkolporn Prasert
Published: February 2012

The objective of the present study was to prepare a novel mixed functional cationic exchange copolymer microsphere containing methyl methacrylic acid and sulfonated styrene crosslinked with divinylbenzene. The emulsion polymerization was used to prepare the cationic exchange copolymer microsphere which was characterized by the scanning electron micrograph (SEM) and the fourier transform infrared spectroscopy (FTIR). The release characteristic of the loaded drug i.e. dextromethorphan hydrobromide from the copolymer microsphere was studied under both simulated gastric (pH 1.2) and intestinal (pH 6.8) conditions. The result showed that the drug released from the novel copolymer microsphere depended on the pH of the release media.
Preparation and Uranium Sorption Performance of Amidoximated Polyacrylonitrile/Organobentonite Nano Composite
Authors: Shen Jiang Nan , Yu Jie , Chu Yue Xia , Zhou Yong , Chen Wei Jun
Published: February 2012

Polyacrylonitrile/montmorillonite (PAN/MMT) nanocomposite with amidoxime functionality was prepared from acrylonitrile monomer(AN) and montmorillonite(MMT) through in-situ intercalation polymerization. Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction patter (XRD) were employed to characterize the obtained Na-MMT、Organ-MMT、PAN/MMT、APAN/MMT. Effects of preparing conditions of APAN/MMT on adsorption of uranium were investigated. The FT-IR spectra show that the new absorption band at 1653 cm-1( ) appears and the absorption band at 2243 cm-1(-CN) disappears on the spectrum of APAN/MMT, it indicates that the AN and MMT are successfully polymerized by in-situ polymerization and the PAN/MMT is amidoxime functionalized. The APAN/MMT nanocomposite completely lose the X-ray diffraction. The adsorption results show that the obtained APAN-MMT gives uranium adsorption capacity of 3.06 mg.g-1 under following conditions: uranium ion concentration of 10 mg/L, AM mass concentration of 80.0%, initiator of 4.5%, polymerization temperature of 70 °C，polymerization time of 3 h, pH of 7 and amidoxime functionalized reaction time of 2 h.
Effects of Substrate Bias on the Microstructure and Properties of a-C:H Films Deposited by MFPUMST
Authors: Dai Hai Yang , Zhai Feng Xiao , Cheng Xue Rui , Su Lei , Chen Zhen Ping
Published: February 2012

Hydrogenated amorphous carbon (a-C:H) films on silicon wafers were prepared by middle frequency pulsed unbalanced magnetron sputtering technique (MFPUMST) at different substrate bias under the acetylene-argon mixed gases. These films were characterized with Raman spectroscopy, atomic force microscopy (AFM) and nanoindentation. Raman spectra show that the sp3 fraction in a-C:H films increases with increasing substrate bias voltage from 0 to 100 V, and then decreases when the substrate bias above 100 V. AFM and nanoindentation results reveal that the surface roughness and nano-hardness of the films increase with increasing substrate bias voltage from 0 to 100 V, and then decreases when the substrate bias above 100 V. The mechanism of sputtering current on the sp3 fraction is discussed in this paper.
Effect of Deposition Temperature on Surface Roughness of Nanocrystalline Diamond Film
Authors: Dai Wen Qi , Wang Lin Jun , Huang Jian , Liu Yi Feng , Tang Ke , Xia Yi Ben
Published: February 2012

Nanocrystalline diamond (NCD) films were synthesized by hot-filament chemical vapor deposition (HFCVD) method at different temperatures (600 °C, 620°C, 640°C and 660°C). The AFM and Raman analyses demonstrated that deposition temperature has a great effect on the surface roughness and quality of NCD films and 620°C is the temperature to grow NCD films with smooth surfaces.
Buffer Layer Effects on the Structure and Morphology of SmCo/Cu Thin Films
Authors: Zhang Qi Ping , Fang Qing Qing , Wang Wei Na , Lv Qing Rong , Liu Yan Mei , Zhang Han Ming
Published: February 2012

In this paper, we investigated the structure of SmCo films with different thickness and the effects of Cr buffer layer on the structure and morphology of SmCo/Cu thin films. Our data revealed that the magnetic properties of the samples were enhanced by the crystallization of SmCo which was promoted by the optimized Cu underlayers. We also found that the surface roughness can be decreased by Cr layer and the texture can be improved by prolonging the annealing time for thick SmCo film. Thus, we concluded that the magnetic properties of SmCo/Cu films can be further optimized by varying the thickness of Cr buffer layers.
Preparation and Mechanical Characterization of Nanocrystalline Diamond Films on Aluminum Oxide Substrates
Authors: Meng Xiang Qin , Fu Wu Jun , Wang Bing , Yang Cheng Tao
Published: February 2012

Nanocrystalline diamond (NCD) films were prepared on polycrystalline aluminum oxide (Al2O3) substrates by microwave plasma chemical vapor deposition (MPCVD) technique using Ar/CH4/CO2 plasma. The main objective is to study the structure and mechanical properties of the NCD films. The NCD films micrograph were examined by scanning electron microscopy (SEM) and atom force microscopy (AFM). The structure and phase composition of the films were analyzed by X-ray diffraction (XRD) and visible Raman spectroscopy. Friction testing machine was used to test the friction coefficient of the films. It was found that the diamond films possess better structure and smooth surface. Compared to Al2O3 substrates, the friction coefficient of the NCD films was smaller and the wear resistance was improved significantly.
Design for Manufacture and Integrated Manufacturability Evaluation System
Authors: Liu Hong Jun , Tong Xiao Yan , Lv Sheng Li , Fan Qing Ming
Published: February 2012

In the light of growing global competition, organizations around the world today are constantly under pressure to produce high-quality products at an economical price. The integration of design and manufacturing activities into one common engineering effort has been recognized as a key strategy for survival and growth. Design for manufacturability (DFM) requires product designers to simultaneously consider the manufacturing issues of a product along with the geometrical and design aspects. In this paper, part manufacturability was analyzed in detail. An evaluation system of DFM was proposed. Product design can be guided according to feedback information by evaluating the part manufacturability.
Microstructure and Mechanical Characteristics of the CrN/Si3N4 Multilayered Films Prepared by Sputtering
Authors: Liu Chien Cheng , Liu Kuang I , Lin Hao Tung , Cheng Yung Mao
Published: February 2012

Multilayers of CrN/Si3N4 coatings were prepared by magnetron sputtering on die steel substrates. The layers of CrN/Si3N4 films were varied to investigate their effects on microstructure, morphology, nano-hardness properties determined by X-ray diffraction, field-emission scanning electron microscope (FE-SEM), nanoindentation, and pin-on-disk, respectively. The result shows that CrN has highly (111) preferred orientation and Si3N4 exhibits amorphous phase at working temperature of 200 oC. The surface of coatings revealed smaller grains and uniform dense with higher layers. The number of layers increased with enhancing of the mechanical properties, and hardness values. At 64 layers films had the largest nano-hardness. Besides, the highest layers of CrN/Si3N4 multilayers have been achieved the lowest friction coefficient for against steel ball.
Damage Evaluation of Supercritical CO2 for Hydronibrile Nitrile(HNBR)
Authors: Yang Xiao Lu , Wang Feng , Li Qing , Zhang De Ping , Zeng De Zhi , Zhu Hong Jun , Lin Yuan Hua , Li Shi Guo
Published: February 2012

CO2 corrosion for rubber materials makes sealing failure of downwell tools and annulus pressure even, which will endanger the safety production of gas injection wells. The high-temperature high-pressure autoclave was used to test supercritical CO2 corrosion for dumbbell-shaped hydronibrile nitrile with pressure 35MPa, temperature 90°C. The change in mechanical properties and corrosion morphology had been analyzed and compared before and after corrosion test in gas and liquid phase environment. Experimental results show that the hardness of hydronibrile nitrile was hardly changed and no dissolution occurred after corrosion. But the tensile strength decreased by 50%. In engineering design, the influence of corrosion on mechanical properties of rubber should be fully considered, and the mechanical properties of rubber in origin state should not be taken as the basis. The research results have provided evidence for the use of rubber materials in CO2 corrosion environment.
Equilibrium Automatic Wind Door and Electronic Control System
Authors: Cheng Guang Zhen , Lin Hong Fei , Zheng Yun Ting
Published: February 2012

This paper will introduce the application status of the wind door of the underground coal mine, the structure and composition, the working principle, the hydraulic system, and the electrical control system of the automatic wind door which is controlled by PLC. This paper will focus on the design of the programmable controller program and show the ladder diagram of the corresponding program and the outer way of wiring.
Rust Layer Structure Analysis of Q235 Atmospheric Corraded in Tangshan Industrial Estate
Authors: Wu Bao Cai , Liu Chun Ming
Published: February 2012

Metallic materials are corraded unavoidably with deterioration of eviroment in heavy industry cities. Transformation of rust layer structure of Q235 atmospheric corraded in Tangshan industrial estate was analyzed with instrumentalities of X-ray Diffraction (XRD), Scanning Electron Microscope (SEM) , EDS and so on. The results showed that corrosion outcomes of Q235 transformed from FeOOH and Fe3O4 to FeOOH, Fe3O4 and FeSO4 through insolation in one year.
Effects of Boron Addition on Undercooled Austenite Transformation of Low Carbon Mn-Nb Steels
Authors: Li Yan Mei , Duan Zheng Tao , Zhu Fu Xian
Published: February 2012

The effects of boron on the undercooled austenite transformation of low carbon Mn-Nb steels during continuous cooling were investigated in this study. Five kinds of steel specimens were fabricated by varying boron contents. Continuous cooling transformation (CCT) curves of the investigated steels under deformed conditions were constructed by a combination of deformation dilatometry and metallographic methods. The results indicated that a small amount of boron efficiently increased the hardenability of steels and lowered transformation temperature, which leading to a finer bainite microstructure and an increase in hardness.
A Desulphurization Mathmatical Model for Single Snorkel Refining Furnace
Authors: Rui Qi Xuan , Cheng Guo Guang
Published: February 2012

With an increasing demand for high grade electric magnetic steels, SSRF(Single Snorkel Refining Furance) has got much attention due to its high efficiency of both decarburization and desulphurization. However the desulphurization mechanism of this kind SSRF is remarkably different from that of other steel refining processes such as LF,RH etc. , so it is necessary to understand the behaviour of desulphurization clearly. A mathmatical model has been established in this paper to investigate the degree of desulpurization with time on the basis of the influencing factors such as sulphur capacity of flux ,stirring energy of molten steel. It is shown that the desulpurization rate constant is about 1.0E-8 in accordance with the data from the practical test of a steel plant with SSRF.
Influence of Sealing Methods in the Failure Behavior of Fabricated Composite in Ozone Gas Environment
Authors: Liu Guo Ning , Zhao Hua Dong , Yang Wei , Li Yan Min , Zhao Ming Hao
Published: February 2012

Sealing processing technique, a major measure to join parts or components together in machinery or electronic industry, is adopted in this research to seal the fabricated composite material and protect the composite from the potentially harmful influence of the outside environment, particularly the environment with corrosive media like ozone gas (O3), etc. The manufactured composite material mainly consists of organic polymeric materials like polyester fabric and PET thin film. Mechanical tests are performed to measure the mechanical strength of the fabricated composite which has been submerged in corrosive environment for some time period, and to study possibly different failure behavior or mechanism of the composite when the sealing methods are different.
Investigation on Properties of Electroless Ni-P-W/Al2O3 Composite Coatings Deposited on Sintered NdFeB Permanent Magnet
Authors: Yang Dong , Lin Xin Xin , Chen Huan Ming , Gao Ya Hong , Lv Qiong , Wang Yan Qing
Published: February 2012

The Ni-P-W/Al2O3composite coatings were deposited on the surface of sintered NdFeB permanent magnet by electroless plating method. The morphology and the phases of Ni-P-W/Al2O3composite coatings were investigated using scanning electron microscopy and X-ray diffraction respectively. The hardness and the corrosion resistance of the composite coatings were also tested. The results indicated that the composite coatings morphology appears closely nodules morphology, and the microhardness increases linearly with increasing incorporation of Al2O3ratio. Compared with NdFeB magnet and Ni-P-W amorphous alloy coating, the corrosion resistance of the composite coatings was superior to that of the NdFeB magnet and the amorphous alloy coating obviously. However, for the corrosion resistance of Ni-P-W/Al2O3composite coatings with different Al2O3concentration, there is not a linear increase with the Al2O3concentration increasing. The self-corrosion potential of Ni-P-W/Al2O3composite coatings reaches the highest value while increasing incorporation of Al2O3ratio up to 10 g/L.
Modified Gelatin-Based Cell Assembling Process Using Glycerin
Authors: Liu Hai Xia , Li Sheng Jie , Lin Feng , Yan Yong Nian
Published: February 2012

Cell assembly technology adopting the gelatin-based composite materials has found broad application in the field of disease mechanism research, drug development and organ reconstruction etc. But there are still several troublesome problems, such as the necessaries of high forming concentration of gelatin-based materials and the cell damage produced during extrusion. In view of existing situation, a modified gelatin-based cell assembling process using glycerin was brought forward. The results showed that adding 10% (v/v) glycerin to the existing gelatin-based composite materials, the cells inactivation effect under 4 °C or lower temperature environment can be reduced obviously, meanwhile, the glycerin has a compensatory effect of gelatin. It can significantly improve the forming temperature and the cell survival rate, get high cell survival rate even when the scanning speed is on 40 mm/s. In addition, the glycerin is easier to dissolve in culture medium in the tissue analog training process; it is more conducive to the rapid materials degradation, as well as cell proliferation and tissue regeneration. Therefore, modified gelatin-based cell assembly process with glycerin will be more widely used in tissue or organ in vitro assembly process.
Quantitative Analysis of Inclusions in Aluminum
Authors: Li Yang , Zheng Yu Lin , Lin Zhuo Yi , Hu Zhi Liu , Zeng Jian Min
Published: February 2012

Three inclusion detection methods: image analysis, colorimetry and flux rinsing were compared aiming at the removal of solid oxide inclusions in molen aluminum in this paper. The testing results obtained from the comparative experiments indicate that the content of inclusions in aluminum can be detected quantitatively and quickly using the three methods. Image analysis is more intuitionistic, but testing value is a little larger; colorimetriy and flux rinsing method are of high accuracy, but testing values are estimated to be a little lower.
Fabrication and Characterization of Hydroxyapatite Nanocomposites Based on Bacterial Cellulose with Surface Modification
Authors: Yin Na , Chen Shi Yan , Ou Yang Yang , Tang Lian , Li Zhe , Yang Jing Xuan , Xu Qiu Shu , Chen Shi Yan
Published: February 2012

In this study, biomimetic synthesis of hydroxyapatite (HAp) nanocomposites based on bacterial cellulose (BC) with sodium alginate (SA) surface modification was studied. The results showed that SA treatment promoted the apatite nucleation ability of BC in SBF solution. The FE-SEM images demonstrated that HAp nanoparticles were successfully formed in the three dimensional nanofiber network of BC. FTIR spectra indicated that the obtained HAp crystals were partially substituted with carbonate, which were very similar with natural bones. It was also found that both of crystallite size and crystallinity of HAp crystals observed from XRD pattern were very low. The resultant nanocomposites consisted of nano-scale HAp crystals and SA treated BC nanofibrous have great potential application in bone tissue engineering.
A Model for the Films Formation of Nb–Si–N Ternary Compound Deposited
Authors: Jiang Yong Jun
Published: February 2012

By means of the reactive magnetron sputtering method, a series of Nb–Si–N composite films with different Si contents were deposited in an Ar, N2 and SiH4 mixture atmosphere. These films’ chemical composition, phase formation, microstructure and mechanical properties were characterized by the energy dispersive spectroscopy, X-ray diffraction, transmission electron microcopy, atomic force microscopy and nanoindentation. In the Nb–Si–N films, 3 distinct concentration regions have been observed depending on the Si content. Based on the three concentration regions, a three-step model is proposed for the film formation of the Nb–Si–N thin films. This model correlates nanoscale structures with macroscopic properties of the films.
Harmonic Response Analysis of Precision Grinding Machine Bed Made by Artificial Granitic Composite Based on ANSYS
Authors: Wang Yi , Li Juan , Zhang Dong
Published: February 2012

Made a harmonic response analysis of cast iron bed and precision grinding machine bed made by artificial granitic composite, Compared the amplitude of the guide rail made by the two materials, According to results of the comparison, Optimized the bed of precision grinding machine bed made by artificial granitic composite. The cast iron bed with the optimal results were compared again. The results show that, Under the same conditions, After optimization of the bed rail, the harmonic response amplitude can be reduced about one order of magnitude.
Finite Element Analysis of Flexural Property of Short Flax Fiber Reinforced Polypropylene Composites
Authors: Shan Ming Jing , Wang Rui , Zhang Qian Qian
Published: February 2012

Recycled general-purpose plastic, polypropylene gained general acceptance because of its excellent properties. At the moment, most of experimental tests of short-natural fibers reinforced polymer composites have been concentrated on macro level, lead to un-matured of fine, micro mechanics research work. In this paper, flexural property of short flax fiber-reinforced polypropylene composites was numerical estimated using a FEM model. It has been observed that initial modulus of the composites increases with the rise in fiber volume fraction, while short fiber orientation distribution has little effect on composites; the stress-strain curves almost have no change.
Failure Analysis of Laminated Composites under in-Plane Compressive Loading
Authors: Yang Yin Huan
Published: February 2012

Failure prediction of laminated composites is performed by progressive failure analysis method. A modified form of Hashin’s failure criterion by Shokrieh is used to detect the failure, where a sudden degradation model is proposed to reduce engineering material constants. The numerical analysis of composite laminates is implemented in ANSYS Parametric Design Language (APDL) with commercial finite element codes ANSYS. The method can predict the initiation and propagation of local damage and response of laminated composite structures from initial loading and ultimate failure. The model has been validated by comparing numerical results with existing experimental results. And then failure analysis specimen fabricated from M40J/Ag80 and investigation on influence of stacking sequences and fiber orientations under in-plane compressive loading have been performed by the proposed model.
The Study on the Thermal Formability of AZ31 Magnesium Alloy Sheets
Authors: Liu Hua Qiang , Mi Zhen Li , Hu Shui Ping , Wang Zhe
Published: February 2012

In this paper, according to the characteristics of the sheets of poor plastic at room temperature and good plastic which is significantly increased after heating, the mechanical properties, microstructure evolution, the flow stress, plane anisotropy and fracture mechanism of AZ31 magnesium alloy sheets at high temperature are studied and analyzed, which provide a reliable basis for the stamping processes of the sheets at high temperature. The most suitable heating temperature for deep drawing sheets of AZ31 magnesium alloy are achieved by the hot-stamping test, and the most suitable heating temperature are near to 350°C. The results for the improvement of the hot-formability of AZ31 magnesium alloy sheets at high temperature provide a theoretical basis and new method.
Application of Fuzzy Control in Wind and Solar Energy Storage System
Authors: Li Cheng Qun , Yang Jin Xiang , Gao Tie Jun
Published: February 2012

Because the output voltage and current of wind and solar power generation system are nonlinear, PID control has its control of energy storage system to reach the best results. This paper presents a fuzzy control system, which intelligent controlling its energy storage system, and details fuzzy control design process, using Infineon’s XC164 microcontroller for the control of the company's core, designing a wind and solar energy storage system, for fast charging, reliable intelligent control system.
Preparation of Multi Cage-Like Zinc Oxide Nanopowder with High Specific Surface Area via a Large-Scale Hydrothermal Method
Authors: Liu Bing , Li Li , Qu Li
Published: February 2012

Multi cage-like zinc oxides were prepared via a facile hydrothermal method. The as-synthesized materials were characterized by means of XRD, TG-DTA, SEM, EDS, and N2 adsorption. The results indicate that the molar ratio of glucose to zinc cation has a significant effect on the morphology, surface area, pore size and distribution of the obtained products. This method is attractive for its merits such as simplicity, commercial feasibility, environmentally benign, surfactant-free, and good potential for scale-up.
Phase and Crystal Structure Evolution of MoSi2-AlCr2 Quasibinary System Alloys
Authors: Ma Qin , Ren Juan Hong , Chen Hui
Published: February 2012

On the principle of alloying modification of the same crystal structure compound, MoSi2-AlCr2quasibinary system alloys were prepared by mechanical activation and hot pressed sintering.The phase composition and crystal structure evolution were investigated by X-ray diffractometer(XRD).The results showed that the main phase composition of alloys were MoSi2and Mo(Si,Al)2,the crystal structure was gradually transformed from tetragonal C11bMoSi2to hexagonal C40 Mo(Si,Al)2. (Mo,Cr)(Si,Al)2phase has not found in alloys.
Preparation and Characterization Flexible Conductive PPy/BC Nanocomposite Membrane
Authors: Tang Lian , Yin Na , Chen Shi Yan , Ou Yang Yang , Chen Shi Yan
Published: February 2012

Polypyrrole (PPy) is an intrinsically conducting polymer that has a wide variety of potential applications on electrical devices, sensors, electrode material, anticorrosion and antistatic coatings. Bacterial cellulose (BC), a natural nano-material with outstanding properties, can be used as a template material. In this study, water-wet BC was firstly used to prepare PPy/BC nanocomposite membrane by combining with PPy. The obtained nanocomposite showed excellent performances such as high conductivity, considerable mechanicl behavior and perfect flexibility. Effects of pyrrole concentration and reaction time on the electrical conductivity of the membrane were investigated. Besides, FT-IR, FE-SEM and mechanical properties were studies. The results revealed that it was possible to develop a novel PPy/BC nanocomposite with potential applications on flexible displays or sensors.
Preparation and Characterization of Nylon 6/Nylon 6 Clay Fibers
Authors: Yeh Jen Taut , Wang Chuen Kai , Liu Zhi Wei , Tsou Chi Hui , Chiang Tai Chin
Published: February 2012

The drawing, tenacity and thermal properties of nylon 6 (NY6)/nylon 6 clay (NYC) composite fiber specimens prepared at varying NYC contents and drawing temperatures were investigated. The achievable draw ratio (Dra) values of NY6x(NYC)y as-spun fiber specimens initially increase in conjunction with NYC content, and then approach a maximum value, as their NYC contents and drawing temperature approach the 0.5 wt% and 120 oC, respectively. The percentage crystallinity (Xc) values of NY6x(NYC)y as-spun fiber specimens increased significantly, as their NYC contents increased from 0 to 2 wt%. The thermal property were performed on NY6x(NYC)y resins and/or fiber specimens to determine the optimum NYC content and possible deformation mechanisms accounting for the interesting drawing properties found above.
On Effect of Microstructure about Bi for AgSnO2 Compositions by Reaction Synthesis
Authors: Zhou Xiao Long , Cao Jian Chun , Cao Yu , Chen Jing Chao , Yu Jie , Du Yan
Published: February 2012

This paper adopted XRD, SEM and DTA/TGA methods to discuss the microstructure of sinter AgSnO2 compositions with bismuth and without bismuth. The results showed that microstructures AgSnO2 compositions are different whether or not include bismuth. The introduction of Bi does not produce the expected SnO2 and Bi2O3 phase, but generated SnO2 and Sn2Bi2O7 phase. The reason with different microstructure has relation with early melting of Bi-rich alloys having low melting point and silver oxide decomposition rate and sinter temperature. Therefore, bring third element should be cautious for preparation composite metal oxide increase silver matrix electrical contact materials.
The Research Progress of Soccer Learning Mechanisms for Robot
Authors: Wang Shuang , Hou Ya Li , Wang Hai Jun
Published: February 2012

This study makes a review of learning theories, methods, technologies and applications about robot soccer player’s behavior how to implement complex tasks. And pointed out that the limitations of its existence, as well as learning strategies of robot soccer. As a test bed of multi-agent system research of robot soccer system, many researchers conducted a study on the technology from different sides, and have achieved some success. The study indicated that researches currently on robot soccer system includes soccer robot architecture, collaboration, under the dynamic environment of a robot, sensor data fusion, complex reasoning and action learning in task, opponent modeling, and more.
Formation Enthalpies of Yellow Gold Alloys with RE Addition Calculated with Chou’ Models
Authors: Zeng Hao Hua , Xiang Xiong Zhi , Lei Su Mei
Published: February 2012

A method to estimate the thermodynamic properties of Multi- component white gold alloys from those of constitutive binary alloys was proposed. The Miedema's theory and Chou model. were used to calculate the formation enthalpies of Au–Cu–Ag-Zn-RE alloys. The agreement between the calculation and experiment is reasonable. Formation enthalpies of Au–Cu–Ni-Zn-RE and relative stability of their intermetallic compounds were predicted with present method.
Study on Morphology and Property of UHMWPE/ PP Blends
Authors: Li Yan Min , Yu Yuan Zhang , Wang Hai Ling
Published: February 2012

The effects of different blending ratio on the properties of UHMWPE/ PP blends were studied in this paper. The result shows that when PP mass fraction is 50%, the heat deflection temperature of the blend is 90°C，which is 1.8 times higher than UHMWPE. While the wearability of UHMWPE/PP is decreased due to the addition of PP, it can be improved compensably by wear -resisting additives. And the notched impact strength of the blends is improved with the increasing content of UHMWPE.
New Method of Powertrain Reliability Test Correlated with Customer Field Usage
Authors: Men Yu Zhuo , Yu Hai Bo , Han Yu , Wang Hua , Xu Liang
Published: February 2012

In order to study the reliability of the powertrain of a heavy-duty truck, a new method of enhancement test correlated with the customer usage based on the typical highway in mountain area(THMA) is presented, which can combine customer usage conditions with the enhancement test on THMA to avoid the blindness of the previous powertrain reliability test. Test data are collected on the actual customer roads and THMA, and the combined evenly divided matrix of the drive shaft torque to the rotational speed is used to obtain the cumulative energy distribution loading spectrum. The total cumulative energy of the customer roads and each customer under the failure probability of 90% is calculated by combining the customer survey according to the straight line equation of the Weibull distribution probability paper and the mathematical model of the powertrain cumulative energy, and then the Monte-Carlo method is used to simulate the total energy output of the powertrain of 90% customer. Optimization calculation is conducted on the cumulative energy of THMA and 90% customer to obtain the enhancement coefficient and reliability test procedures of THMA so as to provide an important basis for scientific evaluation and assessment of the powertrain reliability.
Design and Analysis on Powder Sorting Machine
Authors: Yang Jia
Published: February 2012

The powder of different mixed with crushed the grain size. The grading of the rubber powder processing of screening is a process. Plane in the screening of the sieve powder in the process of main problems is sticky sieve. Can not reach the powder screening requirements. The drum sieve first screening fine powder to reduce the adhesion of vibrating sieve plane phenomenon.
Discussion on Application of the Multifunctional Jack-Up Platform
Authors: Yang Yan Hua , Jin Shu Cheng , Zhang Yong Tao
Published: February 2012

With the rapid rise of the marine industry, it is urgent need to develop the existing marine equipments. In order to meet the development of offshore wind power market and the construction of large-scale bridge over sea, marine machinery is melting towards large-scale, science, profession, intelligence, and multi-function. The study and development of the multifunction jack-up platform has a wide prospect, which integrating with piling, clear base, leveling, lifting, wind power installation, setting and providing life support for maritime and engineering. This article introduces our research status of existing multi-platform, illuminates the trends and application prospects, and puts forward a new multi-function jack-up platform for reference.