bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Microstructure and Oxidation-Resistance of Superalloy Coating with Ni-Base Substituting for Co-Base
Authors: Hu Chun Lian , Hou Shang Lin
Published: October 2012

Microstructures, morphologies and energy spectrums of oxidized films and their cross sections of plasma sprayed alloy coating Co-02 with Co-base, Co-04 whose matrix is nickel partially instead of cobalt and NDCo-02 with Ni-base substituting for Co-base were investigated. The result indicates that the coatings of these three kinds of alloys are white austenite base and Cr7C3 and Cr7(C, B)3 eutectic; Co-02 produces Cr2O3 oxidation protection film, and there were distinct areas with shortage of chromium in Co-04 and NDCo-02 coatings where CoCr2O4 and NiCr2O4 oxidation protection films were produced with spinel structure, these efficiently improved oxidation resistance; these three kinds of alloys have super oxidation resistance which increases according to NDCo-02,Co-04 and Co-02 orderly. The level of oxidation resistance was assessed.
Using Ring Stiffness to Calculate the Elastic Modulus of Steel-Plastic Composite Pre-Insulated Pipe
Authors: Yang Cheng , Wang Fei , Wang Guo Wei
Published: October 2012

Elastic modulus of the pipe mill is one of the most important figures, which decides the character of the mechanics of materials. It is usually gained by experiments or finite element analysis. Combining computing formula of ring stiffness of buried pipeline and test results of ring stiffness of new straight buried thermal pipe (steel-plastic composite pre-insulated pipe), this article uses moment of inertia and equivalent section method to calculate elastic modulus of this pipe catalogue. By comparing with practical test results, the article testifies that this method could be probably used in directly buried installation.
Homogenization Analysis Model for Granule System by Introducing Shape Parameters
Authors: Wei Zhen Hai , Wang Meng Shu , Zhang Ding Li
Published: October 2012

The macroscopic static analysis of granule system performance in Literature [1] considered the position, direction and scale of the connection between granules in the system and other relevant physical properties. Taylor linear expansion was adopted to analyze the geometric displacement of the connection formed by granules. However, for the more complex granular connection in the form of network, the geometric position of granular connection in the statistical domain is linearly approximated, which may result in considerable calculation errors. In the complex network structure formed by granular connection, the displacement of connectors is discrete and discontinuous. In the presence of certain interactions among granular connections, there is the possibility to form spatial granular chain, with increased heterogeneity of deformation in the statistical domain. The accuracy of analysis will be affected if linear approximation is adopted. Shape parameter-based method proposed in this paper is a more universal method, which considers the influence of both the parameter of geometric location distribution of connectors and structural morphology of networks formed by granules. The core idea of this method is to introduce a corrected shape parameter vector for the non-linear part on the basis of linear approximation, to correct the displacement of connectors in geometric space so that the original linear analysis will better adapt to non-linear problems such as the network of connection formed by granules.
Interfacial Assembly and Coordination of a Series of Schiff Base Compounds with Aromatic Spacer
Authors: Zhou Jing Xin , Jiao Ti Feng , Li Adan , Li Xu Hui , Bai Xu Duo
Published: October 2012

A series of Schiff bases derivatives with aromatic spacer have been designed and their interfacial phase behaviors and coordination with Cu(II) ions were investigated. It has been found that on the subphase containing Cu(II) ions, all of the Schiff bases can coordinate with Cu(II) in situ in the spreading films, especially for NSB-C16 with the obvious conformational change of alkyl chains. The in situ Cu(II)-coordinated films could be transferred onto solid substrates and subsequently characterized by various spectroscopic methods such as UV-vis and Fourier transform infrared spectra as well as the morphological characterization with atomic force microscopy measurement. Depending on the different groups, these amphiphiles showed different aggregation behaviors in the Langmuir-Blodgett films.
Preparation and Characterization of CaSiO3 /Natural Rubber Composite
Authors: Zhao Ming , Xu Pei , Chen Ye
Published: October 2012

A series of calcium silicate/rubber composites with different CaSiO3 contents was prepared. micro-morphology, vulcanizing properties and mechanical properties of CaSiO3/rubber were were characterized. It can be observed that mean particle size of CaSiO3 was 2.627 µm. The micro-morphology of particles were honeycomb structure on the particles of CaSiO3. As compared with NR, the least torque enhanced wtih increasing CaSiO3 content. Curing rate reduced with a rise of CaSiO3 content. The tensile strength and the elongation of composites was increased with increasing CaSiO3 content.
Reinforcement of NR with ENR Modified RHA
Authors: Zeng Zong Qiang , Liu Hong Chao , Yu He Ping
Published: October 2012

The rice husk ash (RHA) was first modified with epoxidized natural rubber latex (ENRL) and then blended with natural rubber latex (NRL) to prepare NR/RHA composite. The morphological structure, thermal stability and dynamic properties were studied with multiple instruments. FTIR and TGA analysis showed that ENR was grafted onto the surface of RHA. The composite prepared with modified RHA showed better dispersity and reinforcement compared to the composite with unmodified RHA, and the glass-transition temperature tended to be higher.
Research on LB Films of Two Schiff Base Compounds with Alkyl Chains and Different Azobenzene Substituted Groups
Authors: Zhou Jing Xin , Jiao Ti Feng , Li Xu Hui , Wang Feng Yan
Published: October 2012

In order to investigate the supramolecular assembly and interfacial coordination of special amphiphile, two Schiff Base compounds with alkyl chains and different azobenzene substituted groups were designed and synthesized, and their supramolecular assembly and interfacial properties were investigated by spectral and morphological measurements. It was found that the Schiff base compounds can be spread on water surface to form stable monolayer. When on the Cu(II) ions subphase, an in situ coordination can occur for all ligands. In addition, for the coordination process of C16SB-Me-Azo with Cu(II), there are obvious spectral changes for the alkyl chains. For all process, the headgroups in all amphiphiles have predominant effect in regulating the aggregation mode and spectral changes in organized molecular films.
Stress Intensity Factor of Thermal Fatigue Crack in High Temperature
Authors: Yan Ming , Li Hao Chuan , Li Lin
Published: October 2012

Stress intensity factor of thermal fatigue crack was calculated within one cycle by using finite element method in consideration of the multi-linear kinematic hardening characteristic of a material. The affection of loading sequence to stress intensity factor was studied under circularly variational temperature by comparing to that in one cycle. The low temperature cycle can not affect the stress intensity factor of latter cycles with high temperature; but high temperature cycle can affect the stress intensity factor of latter cycles with low temperature, and make it be equal to that of the high temperature cycle.
Study of an Inorganic Ion Exchanger Mg0.5Ti1.25O3
Authors: Jiang Jin He
Published: October 2012

The ion-exchanger Mg0.5Ti1.25O3 was prepared by a solid state reaction crystallization method. The extraction/insertion reaction with this material was investigation by X-ray, saturation capacity of exchange, and Kd measurement. The acid treatments of Mg0.5Ti1.25O3 caused Mg2+ extractions of more than 72%, while the dissolutions of Ti4+ were less than 7.1%. The experimental results have proved that the acid-treated sample has a capacity of exchange 5.4mmol•g-1 for Li+ in the solution.
Study on Cu2+ Absorption Characteristics of Bentonite - Acrylic Acid Resin
Authors: Zuo Ke Sheng , Liu Jian Chao , Shang Peng
Published: October 2012

Bentonite has better heavy metallic ion adsorption capacity than most of other minerals. But bentonite suspension is stalbe and it makes the solid-liquid separation very difficult. To solve this problem, bentonite was fixed into the resin by copolymerizing with acrylic acid. The reaction mechanism and the effect of bentonite on the properties of the resin were studied. The results show that the addition of bentonite has similar effect on the water-absorption and Cu2+ adsorption properties of the resin. When the mass ratio of bentonite to acrylic acid is below 1∶2, the addition of bentonite improve the water absorption and Cu2+ adsorption properties, and the water absorption and Cu2+ adsorption properties decline with more bentonite added.
Study on Gas-Liquid Inclusions in Quartz Sand under Microwave Field
Authors: Hou Qing Lin , Li Jing , Yin Rui Ming , Chen Lin Zhang , Li Lu , Ji Fu Bao
Published: October 2012

The impurities and gas-liquid inclusions in quartz sand, which are from our country and UNIMIN Corporation respectively, were analyzed by Inductive Coupling Plasma Emission Spectrograph（ICP-AES）and Fourier Transform Infrared Spectroscopy (FT-IR). The results showed that the biggest difference between them was the content of gas-liquid inclusions. Thus, in order to improve the quality of our country high purity quartz sand, development of new technology to remove gas-liquid inclusions has been imperative. Method for removal of gas-liquid inclusions, using microwave radiation, was studied in this project. Meanwhile, the change of microscopic morphology of gas-liquid inclusion was observed by polarizing microscope. And the change of water content in gas-liquid inclusion was investigated by Fourier Transform Infrared Spectroscopy. Our results showed that micro-crack could be produced on the surface of gas-liquid inclusion under microwave treatment. The results also showed that new water molecules and liquid inclusions could be generated in the process. Furthermore, these liquid inclusions could be removed and H2O could be reduced by HF acid leaching.
Study on Kinetics of Reaction between ZrNi5 and Water Vapor
Authors: Yao Yong , Luo De Li , Huang Zhi Yong , Song Jiang Feng
Published: October 2012

In order to evaluate the feasibility of tritium recovery from tritiated water by thermochemical decomposition using ZrNi5, the kinetics of reaction between ZrNi5 and water vapor was studied by thermogravimetric method in the temperature range from 673K to 823K. The result shows that reaction rate increased significantly with the increasing of temperature and H2O concentration; the reaction mechanism for ZrNi5 can be described by the first-order chemical reaction, and the reaction is first order for H2O concentration. The reaction activation energy of ZrNi5 is 55.8kJ/mol calculated from the Arrhenius equation.
Characteristic Improvement of Carbon Coating by Furan Resin on Natural Graphite as Anode for Lithium Ion Batteries
Authors: Wu Yu Shiang
Published: October 2012

Natural graphite and carbonaceous materials are the most promising materials as the anode for lithium ion batteries. Carbon coating on natural graphite can inhibit the insertion of lithium complex into graphite and reduce its irreversibility. This study verifies that furan resin can be used as a carbon-coating material to enhance the electrochemistry of the charging and discharging cycles. Furan resin changes into amorphous carbon after heat treatment at 1100°C. It is determined that the 40 wt.% furan resin/natural graphite combination material clearly improves the electrochemical properties by electrical cycling tests. The surface properties have been investigated by Raman spectroscopy profiles and the bulk analyzed by X-ray diffraction (XRD) measurements.
Effect of Carrier Surface Modification on the Resultant Antibody to Folic Acid
Authors: Tang Qiu Shi , Lei Hong Tao , Huang Long Bin , Sun Yuan Ming , Yang Jin Yi
Published: October 2012

For the generation of antibodies against small hapten molecules, the hapten is cross-linked with some carrier protein to make it immunogenic. However, it was rarely systematically studied about the effect of modified carrier protein on the obtained antibody nature. In this study, folic acid as the model hapten was coupled to natural and surface-modified bovine serum albumin (BSA) using modifying agent amidocaproic acid (ACA) and hexamethylene diamine (HDA). The three immunogens of FA-BSA, FA-ACA-BSA, FA-HDA-BSA were confirmed by SDS-PAGE and ultraviolet spectrum (UV). The Balb/C mice were immunized with the artificial antigen to obtain three specific antibody with indirect competitive enzyme-linked immunosorbent assay (icELISA) method to compare the performance of antibodies obtained based on different imunogen. The results indicate that the conjugates were successfully synthesized and the coupling ratio from the high to the low was HDA-BSA > ACA-BSA > BSA, while the titer of antibody was ACA-BSA > BSA >HDA-BSA and the IC50was HDA-BSA < ACA-BSA < BSA. This suggests that sensitivity of antibody was improved by cationizing the carrier protein.
Effect of Heat Treatment on Microstructure and Corrosion Resistance of Ni-Cr-Mo-Fe Alloys
Authors: Ding Er Chao , Man Zhen Yong , Yang Xin Xin , Zhao Jing Tai
Published: October 2012

The effects of heat treatment on microstructure and corrosion resistance of Ni-Cr-Mo-Fe nickel-based alloys were investigated by X-ray diffraction (XRD), metallographic microscope (MM), scanning electron microscopy (SEM) and electrochemical analysis, respectively. Experimental results indicated that the samples which were prepared via electric arc melting shielded by argon were pure solid solutions with homogeneous microstructure. Segregation of chromium element and slightly smaller grain size were found after heat treatment. Better corrosion resistance of samples was achieved after heat treatment, due to improvement of microstructure, morphology and distribution of elements.
Effect of Hydrogen Content on Structure and Properties of Sintering Body Utilizing TC21 Hydrogenated Powder
Authors: Tian Ya Qiang , Wei Ying Li , Hou Hong Liang , Ren Xue Ping
Published: October 2012

The effect of hydrogenation on structure and properties of TC21 alloy by die forming and sintering using hydrogenated powder was researched by means of the room-temperature die forming and sintering in protection air to produce titanium alloy. The results show that the structure of TC21 titanium sintered body using hydrogenated powder with hydrogen content of 0.39 wt% by die forming and sintering is thinner and the density is higher than the others. The compression strength and compressive yield strength of TC21 sintered body with hydrogen content of 0.39 wt% are well. With hydrogen content increasing, the structure of TC21 production using hydrogenated powder by die forming and sintering gets well and the grain size becomes smaller. After annealing, the structure of TC21 titanium production gets more uniformity and refinement obviously, and the hydrogen content of TC21 alloy safety state is achieved. In the end, the density and mechanical property of TC21 titanium alloy sintered body with hydrogen content of 0.39wt % is the best.
The Effect of Suspension Casting on the Properties of Fly-Ash Particle Reinforced Al Matrix Composites
Authors: Jiang Zheng Wu , Luo Hong Feng , Li Zhu Jun
Published: October 2012

The effect of suspension casting on the properties of fly-ash particle reinforced aluminum matrix composites is studied in this paper. The result shows that adding suspending agent with the same composition of aluminum matrix ,can improve the microstructure of aluminum matrix composites contain 5vol% fly-ash particle when addition temperature is 800°Cand addition quantity of suspending agent is 3%. The hardness and wear-resistance of fly-ash particle reinforced aluminum matrix composites can be increased by 13.10% and 20.10%.
Crystallization Behavior during Preparation of Glass-Ceramics from BF Slag of Baotou Iron and Steel Company
Authors: Wang Yi Ci , Zhang Jian Liang , Jiang Qi , Luo Guo Ping , Yu Wen Wu
Published: October 2012

In this paper, the crystallization behavior including crystallization temperature, nucleation temperature, microstructure of glass-ceramics and crystal phase composition during preparation of glass-ceramics by melting method from blast furnace(BF) slag of Baotou iron and steel company, quartz sand and other materials was investigated using differential thermal analysis, X-ray diffraction and scanning electron microscopy. The results show that the crystallization peak temperatures of the parent glasses are 962~966°C when the ratio of blast furnace slag changes from 20% to 50%, and uniform, compact grains in the prepared glass-ceramics are obtained, whose diameters are about 0.2-0.5μm. In addition, the major crystalline phases are identified as diopside(Ca(Mg,Al)(Si,Al)2O6）and diopside containing aluminum(Ca(Mg0.5Al0.5)(Al0.5Si1.5O6), and the mechanical properties of glass-ceramics are good, among which the flexural strength is more than 110Mpa. The results have theoretical guidance meaning and practical reference value for realizing industrial production of preparation of glass-ceramics from BF slag of Baotou iron and steel company.
Effect of Hot-Rolling Parameters on Microstructure and Mechanical Properties of 72LXA Steel Wire Rod
Authors: Zeng Jian Hua , Li Yi Chang , Zhou Zheng , Chen Jun
Published: October 2012

Effect of the laying head temperature and controlled cooling process on microstructure and mechanical properties of 72LXA wire rod were investigated．The results show that under the same cooling process，with the raising laying temperature and increasing sorbitizing rate and decreasing proeutectoid ferrite，the steel rod strength is improving，proeutectoid ferrite and sorbitizing rate are the critical impact factors on steel rod properties；indentifying cooling after perlite forming can restrain the dissolve of lamellar cementite；the mechanical properties of whole rod coil are improved by the proper rolling rate and air cooling．The high strength of 1050 MPa of steel rod was obtained，that shows the defined hot rolling process can conform to the steel rod properties requirement．
Experimental Study of Floatation on Non-Independent Copper Oxide Ore from Jilin Province in China
Authors: Deng Rong Dong , Liu Quan Jun , Yang Xiao Feng , Hu Ting , Ye Feng Hong
Published: October 2012

Through the processing of mineralogical study on a copper ore from Jilin province in China, it found that the copper exist mostly with the form of chalcopyrite, and others exist with the form of copper oxide minerals which with complex ingredient. The copper oxide minerals are due to the altered of the edge of chalcopyrite, and have not formed the independent copper oxide ore. It belongs to unconventional hard-to-beneficiate copper ore. Coarse grinding fineness and bulk floatation was used to recover the copper oxide ore and copper sulfide ore by using amino double phosphoric acid and butylamine dithiophosphate as the collector. This process was similar to the carrier flotation and achieved an effective processing of the copper oxide ore and obtained a high-grade copper concentrate assaying 15.8% with a high recovery of 82.4%.
Inclusion Control of Oil Drilling Steel SAE4137
Authors: Chen Liang , Chen Tian Ming , Chen Yong , Zeng Yao Xian , Li Ping Fan
Published: October 2012

In consideration of inclusion control in smelting drilling steel SAE4137 by convert process, the software FACTSAGE is applied on the deoxidation technology, composition of ladle slag and calcium treatment technology. The tests show that the deoxidation technology is reasonable and the oxygen content of molten steel is not more than 5×10-6 and 3.2×10-6 on average. The inclusion of bar is less and like a ball. The effect of calcium treatment is good. The inclusion is transformed in refining process, the absorbing ability to inclusion of ladle slag is strong. The level of any type of inclusion is not more than 1.5. The mechanical performance of SAE4137 bar meets the requirements, and the inclusion control technology does not influence the mechanical performance of bars.
Influence of the Mechanical Activation on the Reactivity of Germanium-Containing Zinc Neutral Leaching Residue
Authors: Liu Chen , He Hang Jun , Liang Duo Qiang , Huang Han , Man Lu Man , Song Yu , Luo Si Qiang
Published: October 2012

Zinc neutral leaching residue from conventional roast-leach-electrowin often contains a considerable content of germanium. In two-stage leaching process (weak acid leaching and hot acid leaching), dissolution yield of germanium as well as zinc is low due to the compact structure of the residue. In the paper, an attempt of increasing their dissolution yield was made by pretreatment of mechanical activation. The experimental results obtained show that the activated residue has much faster leaching kinetics, and that according to current technical standard operating in Yunnan Chihong Zinc & Germanium Co., Ltd, dissolution of germanium and zinc is increased by 18.12% and 22.93%, respectively. The increase may mainly be due to the structure deformation of the residue by further investigation.
Numerical Simulation on Temperature Drop of Molten steel in 210 t Ladle
Authors: Tian Shi Long , Yang Zhi Li
Published: October 2012

By establishing finite element mathematical model for heat transfer in the ladle to simulate transient temperature distribution field, this paper, with typical value method and energy conservation method, studies effect of ladle preheating temperature and insular linings of the ladle on molten steel temperature drop in the 210 t ladle used by Chongqing Iron & steel Co., Ltd. Furthermore, decrease rate of molten steel temperature is forecasted under different working conditions. These predicted results are compared to those obtained by temperature measurements on the site, which shows that ladle preheating temperature affects the rate of molten steel temperature drop a lot, and the decrease rate of molten steel temperature in casting state is greater than in holding state of molten steel. Actual temperature decrease rate of molten steel on the site is between one obtained by energy conservation method and one obtained by typical value method. These studied conclusions provide good reference for molten steel temperature control in Chongqing Iron & Steel Co, Ltd.
Utilization of Steelmaking Dry-Dedusting Dust
Authors: Chen Lian
Published: October 2012

Based on the composition and characteristics of steelmaking precipitator dust, cold briquetting ores were processed with scale and applied to converter vanadium recover. The research results show that the use of cold briquetting ores, molten iron carbon oxidation rate increased from 15.01% to 17.68%, vanadium oxidation rate increased from 79.47% to 82.07%, the TFe content of vanadium slag reduced, the consumption of iron and steel materials decreased. In the process of converter vanadium recover, the amount of coolant could cut down.
Optimization of Secondary Cooling on Rectangular Bloom Based on Subproblem Approximation Method
Authors: Chen Wei , Feng Yong Ping , Zheng Na , Chen Ying
Published: October 2012

For understanding the surface and internal defects of Q195 steel of 150mm×220mm rectangular bloom, a solidification heat transfer mathematics model based on temperature measuring is established. Meanwhile, the secondary cooling water is optimized according to the metallurgical criteria by means of subproblem approximation method. The results showed that: after the optimizing result is applied in actual production, the water consumption is reduced 8.2~11.5%, the quality of bloom improved obviously, and the defects such as central pipe, center porosity and internal cracks are reduced respectively.
Effect of Heat Treatment on Microstructure and Properties of Cr15 Super Martensitic Stainless Steel
Authors: Jiang Wen , Zhao Kun Yu , Ye Dong , Li Jun , Li Zhi Dong , Li Shao Hong , Su Jie , Yong Qi Long , Han Xiao Chen
Published: October 2012

The microstructure and mechanical properties of Cr15 super martensitic stainless steel after different heat treatment were studied by SEM and XRD. The results show that the microstructure of steel A and B are lath martensite and retained austenite after quenching. The original austenite grain size increases with the increasing quenching temperature. The microstructure is composed by tempered martensite and reversed austenite after tempering. The amount of reversed austenite in both steels increases first and then decreases with the increasing tempering temperature. Both of the tested steels have the best mechanical properties at 650°C tempering temperature.
Study on Inclusions of Low Carbon Steel Slabs Produced in Different Casting Stages
Authors: Peng Qi Chun , Xiong Wei , Yu Xue Sen , Zou Jian , Peng Sheng , Sheng Xi Song
Published: October 2012

Through studying the inclusions of low carbon steel slabs produced in different casting stages, the results are dawn as follow. The reoxidation of liquid steel is very serious in casting starting,but the casting ending is not. Most of large-inclusions containe K or Na are found in the first and final slabs, which may relate to serious slag entrapment in the mould in the casting starting and ending. Many MgO-Al2O3 and Al2O3-CaO-SiO2-MgO inclusions suggest the serious entrapment of the tundish in the casting ending.
Flotation of Copper Oxide Minerals Using Ethylene Phosphate as Activators
Authors: Yang Xiao Feng , Liu Quan Jun , Deng Rong Dong
Published: October 2012

Studying on difficulty of copper oxide`s flotation, the activation of new pharmaceutical KLY refractory copper oxide ore achieves better test results than the other activator. The final recovery rate of copper ore is 83.99% and the copper grade of concentrate is 22.87%.Through the mechanism of the test shows that the improved ethylene phosphate plays a major role for the activation, which not only has strong chelation, good activation effect but also reduces the amount of sodium sulfide; moreover, it develops good test indicators.
Study on Composite Properties of a Novel Unsymmetrical Diarylethene with Benzene Unit
Authors: Geng Wei Wei , Cui Shi Qiang , Pu Shou Zhi
Published: October 2012

A novel photochromic diarylethene 1-{[2-methyl-5-formyl-3-thienyl]}-2-[2-methyl-5-(4-cyanophenyl)-3- thienyl]perﬂuorocyclopentene(1a) has been synthesized for the examination of its properties including photochromism， fluorescence properties and optical recording. Diarylethene 1a changed the color from colorless to cadet blue upon irradiation with 297 nm UV light, in which absorption maxima were observed at 600 nm in hexane and at 610 nm in PMMA film, respectively. The open-ring isomer of the diarylethene 1 exhibited good fluorescence switch in hexane solution. In hexane solution, the open-ring isomer of the diarylethene 1a exhibited relatively fluorescence at 383 nm when excited at 310 nm.
Synthesis and Application of a New Diarylethene with Composite Properties for Polarization Holographic Recording
Authors: He Shang Hua , Liu Gang , Cui Shi Qiang
Published: October 2012

A new unsymmetrical photochromic diarylethene bearing a benfuran and a thiophene aryl unit 1-(2-methyl-3-benfuran)-2-{2-methyl-5-[2-(1,3-dioxolane)]-3-thienyl}perfluorocyclopentene (1o) has been synthesized. It’s optoelectronic properties, such as photochromism in solution as well as in polymethylmethacrylate(PMMA) amorphous films, fluorescence and photon-mode polarization multiplexing holographic recording were investigated. Diarylethene 1o changed the color from colorless to red upon irradiation with 313 nm UV light, in which absorption maxima were observed at 509 nm in hexane and at 520 nm in PMMA amorphous film, respectively. This new photochromic system also exhibited remarkable fluorescence intensity and clear fluorescent switches by photo irradiation in solution. Finally, rewritable holographic optical storage using 1a was performed.
Photochromic Composite Properties and Application in Optical Memory of a Diarylethene with Benzofuran Unit
Authors: Jing Shu Hong , Cui Shi Qiang , Pu Shou Zhi
Published: October 2012

A new photochromic diarylethene, 1-[2-methyl-(5-(4- dioxolane)phenyl)-3-thienyl]-2-(2-methyl-3-benzofuran) perfluorocyclopentene (1o), was synthesized and its photochromic and fluorescent properties were investigated.The product has been characterized by elemental analyses, NMR spectrometry, UV/vis spectrophotometry and Fluorescence spectrophotometry. This diarylethene exhibited reversible photochromism and notable fluorescence photoswitches both in solution and in PMMA films, changing from colorless to pink after irradiation with 297 nm UV light.
Study on Advanced Composite Synthesis of a New Photochromic Diarylethene Materials with Bearing Thiophene Units
Authors: Li Hui , Tu Yuan Ming , Liu Gang
Published: October 2012

A novel unsymmetrical photochromic diarylethene bearing bisthiophene moiety 1-[2,5-dimethyl-3-thienyl]-2-[2-methyl-5-(2-methylphenyl)-3-thienyl]perfluoroyclopentene (1o) was synthesized and its photochromic, fluorescent and optical storage properties were also investigated. The compounds exhibited remarkable photochromism both in solution and in PMMA film. The result indicated that the diarylethene 1o changed the color from colorless to purple upon irradiation with 297 nm UV light, in which absorption maxima were observed at 527 and 541 nm in hexane and PMMA film, respectively. The open-ring isomer of the diarylethene 1 also exhibited relatively strong fluorescence both in hexane and PMMA film. The fluorescence intensity declined along with the photochromism upon irradiation with 297 nm light. In addition, optical recording using diarylethene 1c as recording medium was carried out successfully.
Synthesis, Photochromism and Optical Recording Properties of a Diarylethene Materials Bearing an Isoxazole Unit
Authors: Li Xiao Ting , Li Hui , Liu Gang
Published: October 2012

A new unsymmetrical photochromic diarylethene, 1-(3,5-dimethyl-4-isoxazolyl)-2-[2-methyl-5-(4-formylphenyl)-3- thienyl]perfluorocyclopentene(1a) were synthesized, and its properties, such as photochromism and fluorescence properties, were investigated in detail. The results showed that this compound had good thermal stability and exhibited reversible photochromism, changing from colorless to darkred after irradiation with UV light both in solution and in PMMA amorphous film, the maxima absorption of its closed-ring isomer 1b are 529 nm and 541 nm respectively. The open-ring isomer of the diarylethene 1a exhibited relatively strong fluorescence at 492 nm in hexane solution (2 × 10-5 mol/L) when excited at 418 nm. The fluorescence intensity decreased along with the photochromism upon irradiation with 297 nm light. This new photochromic system also exhibited remarkable optical storage character.
Application of ANSYS in Electric Field Distribution of Ti-Al Layered Composite Materials
Authors: Zhou Sheng Gang , Zhu Pei Xian
Published: October 2012

This paper changed the matrix structure model of traditional electrode materials from the the composition of the internal structure of the matrix, used solid-solid compound method of hot pressing diffusion welding for sandwich type structure Ti-Al layered composite materials, The Ti/IrO2-Ta2O5 were got by typical oxygen evolution model coating ingredient(mole ratio of Ir to Ta was 7:3). Microstructure of the layered composite materials was studied by scanning electron microscope (SEM) and Energy Dispersive Spectrometer (EDS), and then the current distribution performance as the anode material for nickel electrowinning in NiSO4-H2SO4 system was characterized by electric analysis module of ANSYS program . The results showed that, The findings indicate that the interface formation of Ti-Al layered composite materials was a reaction-diffusion process. In the technology conditions of this subject, the phase of interface was Al3Ti. Compared with the traditional DSA (Dimensionally Stable Anode) titanium anode, the Ti-Al layered composite anode showed a more uniform current distribution performance.
Study on Composite Optics Properties of FeCl2·4H2O Crystal in Material Engineering
Authors: Miao Feng , Huang Yi
Published: October 2012

Crystal material has an important role in material engineering. FeCl2•4H2O crystal has broad prospects in composite which has been used in energy filed, water treatment field and chemstry industry. To investigate the relationship between properties and construction, absorption spectra has been researched.Considering the crystal structure parameters and average covalent factor N, the energy levels of Fe2+ in FeCl2•4H2O crystal are calculated by diagonalizing the energy matrix of d6. When the value of N is 0.9, the calculated results are in good agreement with the results of experiment. By investigating absorption spectra, the peaks at 5600 cm-1can be assigned as the splitting from1A1 to 5T2. The peak belongs to spin-forbidden transition. The peaks at 6300 cm-1 and 6600 cm-1 can be assigned as the splitting from 3T1 to 5T2 and 5E to 5T2 respectively, which belong to spin-forbidden transition and spin-allowed transition .The peak at 9100 cm-1can be assigned as the splitting from 3T2 to 5T2. The peak at 14800 cm-1 can be assigned as the splitting from 3T1 to 5T2. All results can be used for the production of optical devices.
Production of Composite Glass with Increased Mechanical Properties
Authors: Respondek Zbigniew
Published: October 2012

This paper presents production technology of composite glass and laminated glass composites. These products have mechanical properties better than unmodified glass and they are widely used in: civil engineering, motorization industry, furniture production and in domestic appliances glazing. Glass with improved mechanical properties can be obtained by thermally or chemically treating standard glass. Glass is obtained in this way that has improved flexural strength and greater resistance to thermal loads associated with the uneven heating of the structure. Another way to improve the mechanical properties of glass is to laminate the glass with a foil PVB or resin. The resulting product meets the performance criteria for its use as a protective glazing, with improved sound or fire insulation.
Synthesis and Performance of LiNi0.45Mn0.55O2 as Cathodes for Li-Ion Batteries with the Composite Properties of Materials
Authors: Zhao Li Zhu , Chang Xiao Kai , Wu Chun Fang , Zhang Jin Cheng
Published: October 2012

A compound as the lithium ion battery cathode materials were synthesized by high temperature solid phase synthesis method. The material is mainly the hexagonal structure and space group, and there is a little other phase. The XPS spectra display in the materials the Mn element existed by Mn4+ and the Ni element existed by the mix valent state between Ni2+ and Ni3+; the energy loss spectrum and ICP results are consistent, to ensure that the compounds is LiNi0.45Mn0.55O2 which we need; SEM figure shows it has a loose structure, particle size is about 0.2μm. At a current density 30mA/g at room temperature AC impedance analysis results show that an initial discharge capacity of 298 mAh/g ,which is higher than theoretical capacity of LiMnO2 285 mAh/g, that may be because of the synthesis LiNi0.45 Mn0.55 O2 is composite materials.After 13 circles it dropped to 93.2mAh/g and was steady, the efficiency reached 91.3%.
Study of Flame-Retardant Cotton Stalk Bast Fibers Reinforced Polylactic Acid Composites
Authors: Wu Zheng , Wei Chun Yan , Cui Yong Zhu , Lv Li Hua , Xiao Wang
Published: October 2012

As PLA composites are easy to kindle, making flame-retardant composites is particularly important. PLA can be widely used after improvement. In the process of making cotton stalk bast fibers reinforced PLA composites, adding APP/PER a type of flame-retardants in the experiment produces a kind of composites with good flame-retardant property. Orthogonal experiment table including length and mass fraction of fibers, molding temperature and addition of flame-retardants was devised. Then the study focused on the flame-retardant property of the composites and the analysis of range and variance were done. The optimal processing condition was obtained: length of fibers was 8mm, mass fraction of fibers was 30%, molding temperature was 175°C and addition of flame-retardants was 10%. Fibers reinforced PLA composites with APP/PER got better flame-retardant property than the composites without APP/PER, with the LOI rising 6.61. This kind of composite can be extensively applied in many fields.
Structural and Magnetic Properties of Different Temperature Sintering La-Substituted Barium Ferrite
Authors: Li Jie , Zhang Huai Wu , Li Yuan Xun , Li Qiang , Ma Yan Bing
Published: October 2012

The Ba1-xLaxFe12O19 (0.0≤x≤0.6) ferrite materials were prepared by the standard solid state reaction technique method and sintered at 920 °C with 4 wt% Bi2O3 and at 1150 °C without Bi2O3 in air. The influence of La3+ contents on the microstructure, density, and magnetic properties were studied. The XRD results showed essentially single phase spinel structure. The SEM images of the samples had no obvious relationship with the substituting value. Saturation magnetization continuously decreased from 59.37 emu/g to 57.93 emu/g with sintering temperature from 1150 °C to 920 °C. However, coercive force reached the value of 4547.0 Oe when x=0.6 at 920 °C. The density of the samples also decreased monotonously with increasing x value.
The Research on D107 Electrode Repairment of Weld Surface Defects of Steel Sphere in Material Engineering
Authors: Zhao Dong Mei , Liu Xue Peng
Published: October 2012

Spherical surface weld defects greatly reduce the potential effects of corrosion, produce sliding deformation, and cause the breaking of passivation film; the IGSCC has been finally caused by the solution of the Cr Poor zone under the field environment with high CI content. D107 electrode has low carbon content, the less strain concentration at the grain boundary due to without sliding deformation in the grain under the action of welding residual stress, and less stress corrosion cracking. 2-layers of the D107 weld metal should be welded at least when grinding which has good stress corrosion resistance performance in material engineering
Preparation and Properties of Magnesium-Aluminum Matrix Composites Reinforced with Silicon Carbon Particles
Authors: Zhou Tan Wei , Liu Xiang Rong , Zhang Run Lan , Su Zhuang Zhuang
Published: October 2012

Mg-5wt.%Al alloy based composites reinforced with 0wt.%, 1wt.%, 2wt.% silicon carbon (SiC) particles (average particle size about 3.5µm) were prepared under flux protection conditions. The microstructures, textures, components and hardness of the above composites were investigated through optical microscope, scanning electron microscope, X-ray diffraction and sclerometer. The results indicate that SiC particles are distributed along grain boundaries, limiting grain growth and conducing to the refinement of the matrix. The hardness of composites increases with the increase of SiC particles addition amount. The presences of Mg2Si and the binary carbide Al4C3 were observed in the composites. The Al4C3 phase has a crystal structure closer to that of Mg than to that of SiC, which can be act as a potential nucleant for Mg-5wt.%Al alloy.
Power Spinning Study of Thin-Walled 5A06 Aluminum Alloy Cylinder with Longitudinal and Hoop Inner Ribs for Manufacturing Engineering
Authors: Xu Heng Qiu , Li Ming Zhe , Li Lin Lin , Zhang Rui , Wang Da Li , Liang Wei , Shen Yu Jiang
Published: October 2012

In this paper, a three-dimensional finite element model of power spinning 5A06 aluminum alloy cylinder with longitudinal and hoop ribs is established. It reveals the laws of the stress and strain distribution of the longitudinal and hoop ribs in the spinning process, provides a theoretical guidance for the further optimization of process parameters for manufacturing engineering. The 5A06 aluminum alloy cylinder validated testes are through three stages. The first is to study spinning forming of the ten longitudinal ribs. The second is to study spinning forming ten longitudinal ribs and a hoop combined rib. The third is to study spinning forming qualified samples with ten longitudinal ribs and four hoop combined ribs. Optimization aspect of the aluminum alloy reinforced spinning parameters are obtained through simulation analysis and experimental verification, to provide an ideal theoretical guidance for further material application and production.
Dynamic Compressive Properties of Vulcanized Rubber Material from a Split Hopkinson Pressure Bar Experiment in Rubber Manufacturing
Authors: Ye Pei , Wu Chang He , Liu Zhan Fang
Published: October 2012

In this paper, an attempt has been made to study the dynamic mechanic properties of vulcanized rubber material which is used for industrial structure. A split Hopkinson pressure bar (SHPB) is utilized to obtain uniaxial compression response of the vulcanized rubber material under different strain-rate and temperatures loading conditions. The stress-strain curves under different conditions are obtained, which can be used as a basis for the data analysis procedure. It is found that the dynamic compressive strength of vulcanized rubber improves with the increase of strain-rate. And it is also significantly higher at low temperature than that at normal temperature，which is opposite from stiffness. Vulcanized rubber exhibits excellent superelasticity at temperature of -40°C that is noted as well.
Facile Preparation of the Superhydrophobic Surface on Aluminum Alloy by PP-Coating
Authors: Liu Wen Yong , Sun Lin Yu , Luo Yu Ting , Wu Ruo Mei , Jiang Hai Yun , Liu Yue Jun
Published: October 2012

We investigated the preparation of the superhydrophobic surface on aluminum alloy by PP coating. The effects of PP concentration and duration on the surface were discussed. The contact angle (CA) was measured by an optical contact angle meter and the morphology of the surface was observed by a scanning electron microscope. The result showed that the superhydrophobic surface on aluminum alloy could be facilely fabricated by direct PP coating with a suitable concentration. It was confirmed by SEM that the superhydrophobic surface was resulted from the micro/nano-structure of PP. However, the CA became much lower as time went on. It was indicated that the duration of the superhydrophobic surface on aluminum alloy by direct PP coating was poor and a suitable method for improving the duration should be adopted.
A Simple and Rapid Synthetic Route to Nanocrystalline TiO2 by Microwave Irradiation
Authors: Xu Ling , Xu Hai Yan , Wang Hao
Published: October 2012

Well-dispersed nanocrystalline TiO2 powders with the average size of about 4 nm have been synthesized by a simple and rapid microwave irradiation method. The as-obtained TiO2 nanoparticles displayed obvious quantum size effects characterized by Raman spectroscopy.
The Analysis of Fe Synthesis Catalyst Influence Factors in Material Engineering
Authors: Zhao Dong Mei , Liu Xue Peng
Published: October 2012

for the problem of the heterotopy particle during the Fe catalyst material manufacturing，the influence fact of hemorphology and size distribution of the catalyst is analyzed by cold numerical simulation and pilot test. It includes that the morphology of catalyst particle, the catalyst-synthesis recipe, solvent system of magnesium chloride (MgCl2), the rate of temperature rising, the ester/Ti and lavation treatments for the catalyst
The Electrical Resistivity of B4C Modified Phenol-Formaldehyde Resin Matrix Composite Materials Pyrolyzed at Different Temperatures
Authors: Jiang Hai Yun , Wang Ji Gang , Wu Shen Qing , Zhang Wei Li
Published: October 2012

The electrical resistivity is studied when B4C modified phenol-formaldehyde (PF) resin is heat-treated at temperatures of 300-1500 °C, and then the X-ray diffraction (XRD) spectra are also investigated. The results indicate that the electrical resistivity is elevated with the increase of pyrolytic temperature of PF resin. The addition of B4C decreases the electrical resistivity efficiently when the temperature is range of 700-1000 °C. Especially the composite is treated at tmperatures of 1000-1500 °C. The analysis of XRD spectra suggests that the addition of B4C promotes the arrangement of residue at high temperature. The arrangement reaction has not a direct effect on the electrical resistivity.
The Analysis of Synthetic Al-ZSM-5 in Material Engineering
Authors: Zhao Dong Mei , Liu Xue Peng
Published: October 2012

XRD，XRF，BET，Mossbauer spectrum, TEM and 27AI 29SiMAS NMR is used to characterize the samples in material engineering. Samples of heterocrystalline synthesis show almost the same activity as those prepared by solid-state ion exchange. Both are superior to the samples by traditional methods. In NH3-SCR，Al-ZSM-5 exhibits a similar activity of deNOx to Cu-ZSM-5，while with C3H8 as reducing agent Cu-ZSM-5 is much better than Al-ZSM-5
Fabrication of Super-Hydrophobic Film on Tinplate’s Surface by a Simple Casting Method in Material Engineering and its Application
Authors: Liu Qi Long , Chen Hong , Jiang Hai Yun , Wu Ruo Mei , Yuan Zhi Qing , Li Du Xin
Published: October 2012

A simple, cheap and environmental double thin super-hydrophobic composite film was prepared on the surface of tinplate by a simple casting method. The contact angle and sliding angle were measured by an optical contact angle meter. And the major factors that influenced the super-hydrophobic effect of the composite film were studied in our work. The results showed that when the melting temperature was 120°C, the weight radio of PP and PP-g-MAH was 1:4, the drying time was 24h, the dosage of ethanol was 0.4ml, the composite film showed a satisfactory super-hydrophobicity and its water contact angles reached a maximum value of 156.6° while the sliding angle reached a minimum value of 2°. Because of anti-oxidation, moisture-proof and anticorrosion performance of super-hydrophobic tinplate, it has potential practical applications in packaging material engineering.
Effect of DC and AC Magnetic Fields on the Solidification Structure of Commercially Pure Aluminium
Authors: Ban Chun Yan , Jiang Dan Dan , Liu Lian , Cui Jian Zhong
Published: October 2012

The effect of DC and AC magnetic fields on the macrostructure, morphology and distribution of the iron-containing intermetallics in the commercially pure Al was investigated. It is found that, at a cooling rate of 3°C/min, the grain is very coarse when the alloy solidifies both with and without magnetic fields. Comparing with the sample solidifies without magnetic field, the solidification structure has almost no change when it solidifies under DC magnetic field, while AC magnetic field changes the solidification structure obviously and makes grains show radial columnar crystals. The intermetallics is dominated by long needle-like phase when the sample solidifies under the condition of no magnetic field. Under AC magnetic field, the intermetallics is refined and accumulated towards the center of sample, and the amount of bone-like α-AlFeSi phase is increased remarkably. The mechanism of the effect of magnetic fields was discussed.
Electrochemical Analysis and Applications of New Carbon Materials with Properties of Composite Materials
Authors: Hua Xin , Shen Gui Jun , Du Yu
Published: October 2012

New carbon materials such as carbon nanotube and graphene will play very important roles in the future life. All of the electrochemical properties and applications of these materials as well as electrochemical analysis applications of physical and chemically modified electrodes based on them would be reviewed. Hence, the scope of the current review is limited to analytical electrochemistry using these two carbon materials, and 60 references are cited.