bluuebunny/crossref_metadata_2025_split huggingface dataset:
Thermodynamic Study of CoCrFeNiX (X=Cu, Ti) High-Entropy Alloy
Authors: Liu Zhennan , Liu Cong , Sun Ying , Zhang Songyuan , Cheng Yong , Yao Chunling 
Published: February 2025

Abstract
Thermodynamic properties play a crucial role in the design of high-entropy alloys, and using reliable thermodynamic models for theoretical calculations to obtain key thermodynamic data of alloys has become an important and effective approach. This study predicts the mixing Gibbs free energy, mixing enthalpy, mixing entropy, excess Gibbs free energy, and excess entropy of the solid solution of the transition metal high-entropy alloy CoCrFeNi-X (X=Cu, Ti) system using binary infinite dilution activity coefficients, Miedema theory, and modified M-MIVM, while considering the difference in atomic size. From a thermodynamic perspective, the possibility, phase stability, and structural stability composition of these high-entropy alloys are evaluated. The research results show that the CoCrFeNi-X (X=Cu, Ti) system meets the thermodynamic criteria for high-entropy alloys and can form a five-component high-entropy alloy. For the CoCrFeNiCu alloy system, with appropriately balanced component content, the system’s mixing free energy is more negative, and the alloy structure is more stable. This rule guides the alloy composition design, resulting in a better scheme for the Co0.20Cr0.20Fe0.23Ni0.22Cu0.15 alloy. For the CoCrFeNiTi alloy system, with appropriately high Ni and low Ti conditions, the system’s mixing free energy is more negative, and the alloy structure is more stable. This rule guides the alloy composition design, resulting in a better scheme for the Co0.20Cr0.17Fe0.21Ni0.28Ti0.14 alloy. At high temperatures, the mixing free energy of these alloy systems significantly decreases, enhancing the stability of the alloys. This study provides reliable thermodynamic data and theoretical guidance for the design of CoCrFeNi-X (X=Cu, Ti) high-entropy alloys.
Case Analysis and Influencing Factors Research of Reactor Internals Baffle-Former Bolts on Irradiation Assisted Stress Corrosion Cracking
Authors: Qin Wei , Xu Chaoliang , Liu Xiangbing , Yin Jian , Jin Xiao 
Published: February 2025

Abstract
In order to obtain the distribution characteristic of baffle-former bolts (BFBs) cracking due to irradiation assisted stress corrosion cracking (IASCC), the case analysis of 4 nuclear power plant (NPP) is carried out. Then a discussion about the irradiation damage, stress, temperature and water environment on IASCC is given. The analysis shows that a large number of BFBs are cracked. The BFBs in the middle domain are exposed to higher irradiation and cause more BFBs cracking in PB-2 NPP. Higher stress levels in the bottom and top domains with lower irradiation damage result in the BFBs fracture in G NPP. Higher irradiation temperatures will increase the BFBs swelling rate and alter the local water environment around BFBs, leading to more BFBs cracking in the T-1 NPP than in the D-1.
Preparation and Performance Research of Bio-based High Toughness Polylactic Acid Composites
Authors: Li Xinfang , Zhao Sufen , Wang Ziyang 
Published: February 2025

Abstract
The work aims to prepare the polylactic acid composites with high toughness by adding polybutylene succinate (PBS) with good toughening performance and acetyl tributyl citrate (ATBC) as an interface phase solvent and diisopropylbenzene peroxide (DCP) as a compatibilizer and polyamide compounds (TMC) as a nucleating agent. The bio-based polylactic acid composites are prepared by melt blending. The toughening agent and the effects of phase solvents and compatibilizers on the mechanical performances and transparency of PLA blends were studied. The research focused on investigating the effects of the toughening agent, compatibilizer, and interfacial compatibilizer on the mechanical performances and transparency of the PLA blends, with the aim of developing a high-toughness PLA preparation technology. The results indicated that when 0.4-0.6%. TMC was added to the PLA material, the crystallinity reached 32.7%, and the light transmittance exceeded 92%. Evidently, TMC can promote PLA nucleation and accelerate resin crystallization. The optimal mass ratio of each component in the PLA/PBS/ATBC/TMC/DCP blend was 80:20:10:0.4:0.3, resulting in a breaking elongation of 416.5%, which is 71 times higher than that of pure PLA, impact strength of 4.22 kJ/m2, an increase of 165% compared to pure PLA, a tensile strength of 44.3 MPa, and a light transmittance of 82%. Clearly, the compatibility of the PLA/PBS blend is optimal, with significant toughening and transparency enhancement, broadening its application in the field of transparent products.
Research on Surface Roughness and Surface Topography of TC4 Titanium Alloy Processed by High-Speed Turning
Authors: Tang Lianyao , Peng Peiming 
Published: February 2025

Abstract
Titanium alloy is a typical difficult to process material, in order to further improve the processing quality. In this study, the single factor experiment method was used to perform high-speed turning experiments on TC4 titanium alloy with TiAlSiN carbide coated blade. The experimental results show that the cutting speed (Vc), feed per tooth (fz), and cutting depth (ap) have certain effects on the surface roughness of TC4 titanium alloy. When the feed per tooth increases from 0.04 mm/r to 0.2 mm/r, the surface roughness value (Ra) increases by 7 times. In the cutting speed range of 40-200 m/min, the surface roughness value Ra is about 0.5-0.7 µm. In addition, the effect of depth of cutting (ap) on surface roughness (Ra) is relatively small. The reliability of the experimental results was further verified by observing the surface morphology with an ultra depth field microscope. This study will provide a theoretical basis for the cutting of titanium alloys.
Electrochemical Deposition of PEDOT/MXene Composite Films for Supercapacitor Electrodes
Authors: Zheng Shuhao , Sun Jiaqiang , Hu Wenzhu , Chen Kaiqi , Yang Siwen , Li Mengqian , An Haoran 
Published: February 2025

Abstract
PEDOT is a kind of electrode material for supercapacitors due to its excellent thermal stability, good film-forming properties, and electrical conductivity. However, PEDOT generates large volume changes during charging and discharging, resulting in structural collapse and hampering electrochemical performance. MXene, as a two-dimensional layered nanomaterial, is able to act as a support for PEDOT and reduce its volume change. In this study, PEDOT/Ti3C2Tx composite films were prepared on substrates by electrochemical deposition using cyclic voltammetry method and used as electrode materials for supercapacitors. The effects of different molar ratios of EDOT to PSSNa and the number of CV cycles of growth on the performance of PEDOT were investigated. It was found that the best performance of the prepared PEDOT was achieved when the number of CV cycles was 40 and the ratio of EDOT: PSSNa was 1:3. Under optimum experimental conditions, the PEDOT/Ti3C2Tx was obtained by in-situ polymerization and its specific capacity was up to 41.55 mF cm−2 at a current density of 1 mA cm−2.
Identification Characteristics of Natural and Synthetic Cinnabar
Authors: Yang Xihan , Huang Wei , Shen Jiani , Li Miao , Wu Jing , Luo Shiyun , Deng Junfa , Xiao Zhihao 
Published: February 2025

Abstract
Using gemstone microscope, infrared spectrometer, micro laser Raman spectrometer, and laser ablation inductively coupled plasma mass spectrometer (LA-ICP-MS) to test and analyze synthetic and natural cinnabar on the market. The results showed that when synthetic cinnabar was in block form, obvious needle like straight longitudinal stripes were visible, which had significant differences in morphology from natural cinnabar. The aggregation of natural cinnabar often contains white calcite associated minerals, which appear as white clumps or veins on the surface. The luster differs greatly from the diamond luster of the main cinnabar. At the same time, the Se element content of natural cinnabar is much higher than that of synthetic cinnabar, and the Se content can be used as a reference to distinguish the two.
Impact of Various Warm Mixing Agents on the Performance of Asphalt Mixture
Authors: Wang Fei , Zhang Xinyong , Peng Si , Wang Jia , Yu Jie 
Published: February 2025

Abstract
Rubber asphalt mixtures facilitate the recycling of waste materials and enhance road performance. Nevertheless, they present challenges, including elevated construction temperatures and compaction difficulties. Additives effectively mitigate these issues by lowering the mixing temperature and improving compaction at reduced temperatures. In this study, we evaluated the influence of three distinct additives on rubber asphalt mixture properties. These additives uniformly decreased the mixing temperature by approximately 20°C without compromising porosity. The resultant warm mix rubber asphalt composites satisfy standard pavement performance criteria. While the additives bolstered high-temperature stability and moisture resistance, they slightly impaired the low-temperature crack resistance of the mixtures.
Experimental Study on Milling BK7 Optical Glass Assisted by Longitudinal-Torsional Ultrasonic Vibration
Authors: Liu Zhe , Tong Jinglin , Zhao Bo 
Published: February 2025

Abstract
The purpose of this paper is to fully explore the cutting performance of BK7 optical glass. Two milling methods ordinary milling and ultrasonic vibration (UV) milling are used to conduct a cutting test on BK7 optical glass on a self-made test platform for milling assisted by longitudinal-torsional two-dimensional ultrasonic vibration and research influence law of milling speed, feed rate per tooth and milling depth on milling force (MF) and surface quality for purpose of fully exploring cutting properties of BK7 optical glass. Test results show that the MF in the process of milling assisted by longitudinal-torsional two-dimensional ultrasonic vibration is less than ordinary milling and the surface quality of Longitudinal-Torsional Ultrasonic Vibration (LTUV) milling is superior to ordinary milling under the same conditions.
Degradation Kinetics of Nitrobenzene and Aniline by Fe-N/BC Redox System
Authors: Zhou Ting , Yang Yang , Du Tianxing , Dong Wenyi , Wang Hongjie 
Published: February 2025

Abstract
This study was aimed to analysis the degradation kinetics of nitrobenzene and aniline by the Fe-N/BC redox system. Factors such as the initial pH of the solution, PMS/NaBH4 concentrations, and pollutant concentrations were investigated to explore the variations in pollutant degradation rates in the system. The results indicated that the Fe-N/BC-catalyzed NaBH4 reduction of nitrobenzene followed first-order kinetics, while the Fe-N/BC-catalyzed PMS oxidation of aniline followed pseudo-first-order kinetics. When the pH was alkaline, the reaction was inhibited. Increasing the addition of NaBH4 and PMS from 0.05 to 0.5 g/L resulted in the reaction rate constants for nitrobenzene and aniline increasing from 0.115, 0.120 min−1 to 0.743, 0.354 min−1, respectively. As the pollutant concentration gradually rose from 2 to 50 mg/L, the reactions were inhibited, with the reaction kinetics for nitrobenzene and aniline decreasing from 0.348, 0.288 min−1 to 0.147, 0.091 min−1, respectively.
Study on Bending Performance of Basalt Fiber Ultra-High Performance Concrete
Authors: Gao Fan , Wang Lihuan , Ren Yaning , Li Chu , Yang Jinyong , Wang Zuohu 
Published: February 2025

Abstract
In order to study the effect of basalt fiber on the flexural properties of ultra-high performance concrete (UHPC) slabs, basalt fiber UHPC containing coarse aggregate was prepared. The basic mechanical properties of basalt fiber UHPC were tested, and the bending test of four-sided simply supported two-way slabs was carried out. The effects of different fiber types, steel mesh, waterborne epoxy, and their mixture on the toughness and flexural strength of UHPC slabs were studied. The results show that the basalt fiber can significantly improve the basic mechanical properties of UHPC; Comparing the UHPC plates mixed with different types of basalt fiber, Compared to the plain UHPC plates, UHPC with higher tensile strength and shorter length exhibit higher bending resistance, The peak load increased by 154.7% and 196.6%, respectively, The maximum deflection increased by 38.1% and 326.2%, respectively; The ductility of the UHPC plate mixed with basalt fiber and steel wire mesh has been significantly improved, The maximum increase is 48.9%; Based on the assumption theory, the bidirectional theory is calculated and compared with the test value, and the results agree well.
Sol-gel Method Preparation and First-Principles Calculations of CaCu3Ti4O12 (CCTO)
Authors: Jiang Xiaofen , Chen Wenjie 
Published: February 2025

Abstract
Copper Calcium Titanate (CCTO) is widely used in high-dielectric applications, such as capacitors, where its exceptionally high dielectric constant enables the storage of large amounts of electrical energy in a small volume. In this paper, CCTO powder was successfully prepared using the sol-gel method. The morphology, composition, and crystalline state were characterized using X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM). The X-ray diffraction analysis indicated that the prepared powder had good crystallization, high purity, and quality comparable to commercially purchased CCTO powder. Scanning electron microscopy results showed that the grain boundaries of the powder were clear, and the particles were uniformly complete. The relationship between the dielectric constant and capacitance density of CCTO with frequency reveals that as the frequency increases, the dielectric constant (K value) of the electrode decreases rapidly at first and then the rate of decrease slows down, indicating that the dielectric constant is higher at lower frequencies. The capacitance density of the electrode also decreases rapidly at first and then more slowly as the frequency increases. Moreover, first-principles calculations were performed to study the electronic structure characteristics of CCTO. The band structure diagram indicates that CCTO has an indirect band gap structure. The density of states (DOS) showed that the Cu-O and Ti-O bonds in CCTO form the band structure near the Fermi surface, and it was also found that the contribution of calcium atoms to the band structure is relatively small. The study will provide experimental foundations and theoretical basis for the study of CCTO as a high-dielectric-constant ceramic material.
Research on the Isothermal Forging Process for TC6 Titanium Alloy Blades with Thin-Walled and Variable Cross-Section Characteristics
Authors: Chen Youhong , Sun Xing , Lan Bo 
Published: February 2025

Abstract
TC6 titanium alloy blades with thin-walled and variable cross-section characteristics are key components of aero-engine compressors. Conventional die forging methods for such parts have issues with low dimensional accuracy and poor microstructural uniformity. This study employs the DEFORM software for the simulation and optimization of preform design and investigates the effects of isothermal forging and heat treatment processes on the microstructure and properties of TC6 titanium alloy blade forgings. The process parameters were used to manufacture TC6 titanium alloy blades, and the microstructure and mechanical properties were characterized. The results indicate that an optimized preform is conducive to obtaining blade forgings with high dimensional precision. The forging temperature should be controlled at 45-75°C below the β phase transformation temperature, with a holding time of 60-120 minutes, a deformation speed of 0.01-0.1 mm/s, and a deformation degree of 25-50%. The heat treatment method and parameters significantly affect the content and morphology of primary α and secondary α in the blade forgings. The duplex annealing parameters of “850°C for 1 hour, air cooling + 600°C for 2 hours, air cooling” can achieve the optimal balance of strength and plasticity in the blade forgings.
Study on the Effect of a Modified Phosphorus Flame Retardant on the Properties of Epoxy Resin
Authors: Xiao Ling , Li Yu , Xin Jie , Wang Xuan 
Published: February 2025

Abstract
In this study, we designed and synthesized a phosphorus flame retardant based on DOPO (9,10-Dihydro-9-oxa-10-phosphaphenanthrene 10-oxide) and obtained a modified phosphorus flame retardant (MDOPO). We investigated how the amount of MDOPO affects the flame retardancy and mechanical properties of epoxy resin and characterized the material’s microstructure using SEM. The results demonstrated that the flame retardancy of MDOPO/E44 composites increased with increasing MDOPO content. When 11.43 g of MDOPO was added to 100 g of E44 matrix, the oxygen index of MDOPO/E44 composites increased by 24.7%. The oxygen index increased gradually with further increases in MDOPO content. When the phosphorus content in E44 was 0.6%, the oxygen index of MDOPO/E44, molten DOPO/E44, and powdered DOPO/E44 were 27.3%, 26.8%, and 25.8%, respectively, with tensile strengths of 39.43 MPa, 26.65 MPa, and 18.7 MPa, respectively. Scanning electron microscopy revealed no significant phase separation in the cross-section of MDOPO/E44 flame retardant material.
Design and Application of Efficient Ecological Combination Process in Advanced Treatment of Industrial Tailwater
Authors: Liu Yang , Wang Weimian , Luo Sushuang , Li Fangling , Lin Wu , Wang Xiaojiang , Han Qi 
Published: February 2025

Abstract
In order to solve the advanced treatment problem of industrial wastewater and simultaneously satisfy the needs of ecological and park mode construction, the process of “efficient three-dimensional ecology + constructed wetland” was designed and applied. The technological process, ecological design, operational effect, and technical and economic analysis of the project were systematically described. After stable operation for 12 months, the average removal rates of CODcr, BOD5, SS, NH3-N, TN, and TP were 86.13%, 81.19%, 90.86%, 97.97%, 84.03%, and 80.85%, respectively. The effluent of the system could meet the Class III standard requirements of “Environmental Quality Standards for Surface Water” (GB3838-2002), achieving high-quality effluent and resource utilization.
Ecological Stoichiometry of Carbon, Nitrogen and Phosphorus in Coffee Leaves and Soil from Different Origins in Yunnan Province
Authors: Lv Yu , Huang Qianrui , Meng Shirong , Zhou Xiaohua , Hou Mingxing , Bao Youxian , Zhu Duoju 
Published: February 2025

Abstract
This study examines the ecological stoichiometry of carbon(C), nitrogen(N) and phosphorus(P) in coffee from Baoshan, Pu’er, and Xishuangbanna in Yunnan. The results show that there are significant differences in soil carbon (C) content and C:N ratios among different regions, and the coffee leaves from Pu’er have the highest carbon content. The threshold analysis indicates that the growth of coffee in Pu’er is limited by both nitrogen and phosphorus, while the growth of coffee in Baoshan and Xishuangbanna is limited by phosphorus. The correlation analysis shows strong positive correlations between soil carbon and nitrogen, as well as between leaf carbon and soil nitrogen. Soil management should focus on N and P fertilizers for Pu’er, and P fertilizer for Baoshan and Xishuangbanna to enhance coffee growth and yield.
Research on Haze Pollution Network of Beijing-Tianjin-Hebei Region
Authors: Ma Yubo , Cai Siyu 
Published: February 2025

Abstract
To investigate the dynamic haze pollution correlation among cities in the Beijing-Tianjin-Hebei (BTH) region, a dynamic directed weighted network of BTH haze pollution is established. In this network, nodes represent nine cities in the BTH region, and the weight of the edge is the haze pollution correlation between two cities, which is characterized by the proposed asymmetric upper-tail correlation coefficient formula based on the copula function. The evolution process of the dynamic network is analyzed through the network average weight, clustering coefficient, and network efficiency. The analysis of real haze pollution data shows that the overall correlation extent of the BTH haze pollution network is higher in the early and late stages of the entire time series. The general edge linking the state of the BTH haze pollution network reflects that the haze pollution from other cities has a positive impact on Tianjin and Cangzhou. In most periods, haze pollution from Baoding has affected most cities except Xingtai. Finally, this article gives some suggestions about the joint prevention and control of haze pollution based on the evolution of the haze pollution network.
Electrochemical-Activated Carbon Combined Process for Treating Municipal Landfill Leachate Membrane Concentrate: A Pilot Study
Authors: Yang Liping , Liang Zhaoqi , Han Qi 
Published: February 2025

Abstract
This study investigated the pilot treatment efficiency of the electrochemical-activated carbon combined process for the membrane concentrate of municipal landfill leachate in a southern city in China. The number of electrode plates, current density, and reaction time were optimized, and the stability of pollutant removal during continuous operation was examined. Based on this, the treatment effects and costs of the process were analyzed. The results show that, at the pilot scale, the optimal parameters for the electrochemical oxidation process are three pairs of electrode plates, a current density of 20 mA/cm2, and a reaction time of 30 minutes, resulting in an effluent COD of 573 mg/L and an energy consumption of 40.9 kW·h/kgCOD. During continuous operation treating the membrane concentrate, the effluent COD stabilized around 570 mg/L, conductivity around 19.4 mS/cm, and pH around 8.6. The pollutant removal effect was close to that from small-scale tests, indicating stable continuous operation. After treatment with the electrochemical oxidation-activated carbon combined process, the effluent meets MVR inflow standards, with a treatment cost of 19.95 yuan/t of water.
Research on Land Use and Pollution Source Distribution in the Sanjiang Plain, China
Authors: Wang Shaohua , Guo Lingfen , Huo Yuanxi 
Published: February 2025

Abstract
The Sanjiang Plain is a gathering area of the Heilongjiang River, Songhua River and Wusuli River basins. There are numerous rivers, lakes and wetlands within the Sanjiang Plain, and the urban population is dense. The Sanjiang Plain is one of the important agricultural production bases in China. It is of great significance to conduct research on the ecological environment in this region. This article uses remote sensing technology to monitor land use changes, surface water pollution status, pollution source types and distribution characteristics in the Sanjiang Plain using ETM+ data from 1999, and GF-1 and GF-2 data from 2023. It has shown that the main types of land use changes in the Sanjiang Plain region are arable land, swamp land and forest land in the past 20 years. Industrial, agricultural, and domestic pollution sources are relatively concentrated, and surface water pollution is more prominent. The proportion of Class IV and Class V water quality river sections is relatively high, accounting for 32.9% and 62.7% of the evaluated river length, respectively. The discharged wastewater is mainly industrial wastewater, followed by domestic wastewater.