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Journal of Materials Science & Technology 2022年第17期112卷 291-300页

作者： Hongcan Chen Wei Xu Qun Luo Qian Li Yu Zhang Jingjing Wang kuo-chih chou State Key Laboratory of Advanced Special Steel&Shanghai Key Laboratory of Advanced Ferrometallurgy&School of Materials Science and Engineering Shanghai UniversityShanghai 200444China State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China National Engineering Research Center for Magnesium Alloy Chongqing UniversityChongqing 400044China Ansteel Beijing Research Institute Co. LtdBeijing 102211China

Martensitic transformation is significant to strengthen steels,but its thermodynamic prediction is restricted to simple systems due to lacking multicomponent interaction *** driving forces of martensitic transformation can be divided into chemical and non-chemical driving *** magnetic parameters are carefully optimized because it affects the magnetic Gibbs free energy of austenite and ferrite,and have big impact on the chemical driving *** dilatational strain energy provides major contribution to non-chemical driving force,thus the integrated-models for dilatational coefficient are constructed in a wide composition and temperature range based on the experimental dilatational *** expands the scope of application of thermodynamic model and improved prediction accuracy of martensitic transformation temperature(M_(s)).The prediction error reaches 5.6%for Fe-C-X(X=Ni,Mn,Si,Cr)and6.5%for Fe-C-Mn-Si-X(X=Cr,Ni)steels.

关键词： Martensitic transformation Thermodynamics Dilatational strain energy Linear expansion coefficient Fe-C-X(X=Ni,Mn,Si,Cr)system

Experimental investigation and thermodynamic assessment of La-Y-Ni ternary system in Ni-rich corner

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Rare Metals 2023年第4期42卷 1316-1331页

作者： Sheng-Xiang Wu Li Wang Hui-Ping Yuan Qun Luo Qian Li kuo-chih chou State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou Research Institute of Rare EarthsBaotou014030China State Key Laboratory of Advanced Special Steels Shanghai Key Laboratory of Advanced FerrometallurgySchool of Materials Science and EngineeringShanghai UniversityShanghai200444China GRIMAT Engineering Institute Co. Ltd.Beijing101407China National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing400044China

La-Y-Ni alloys exhibit high discharge capacity due to the formation of AB_(3-3.8)-type(A=La,Y;B=Ni)intermetallic ***,the stable composition and temperature range for this type of phase are rarely reported,which restrains the development of La-Y-Ni hydrogen storage alloys with stable structure and high *** paper focuses on the phase equilibria of the La-Y-Ni ternary system in Ni-rich *** phase constitution,microstructure,and equilibrated composition were experimentally determined at 1273 and 1148 K using X-ray diffraction(XRD),scanning electron microscopy(SEM),and energy-dispersive spectroscopy(EDS).The solubilities of La and Y in the binary compounds were *** ternary compounds,3R-LaY_(2)Ni_(9)with the structure of PuNi3 type and La_(0.5)Y_(0.5)Ni_(5)with the structure of CaCu5 type,existed at both *** on the experimental data,the thermodynamic description of LaY-Ni system was assessed by Calculation of Phase Diagram *** calculated isothermal sections agree with the experimental *** thermodynamic database is helpful for the design of La-Y-Ni hydrogen storage alloys.

关键词： La-Y-Ni system Phase equilibria Calculation of Phase Diagram(CALPHAD) Isothermal section Phase transformation

Identifying the origin of porous evolution of microsized bismuth in potassium-ion batteries

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Science China Chemistry 2024年第7期67卷 2234-2239页

作者： Shenxu Chu Kaixiang Lei Qian Yang Jiaxin Li Yuqing Zhao Mengjia Gu Lin Li Xing Hu Yu Zhang Zhuo Chen Shuo Shi Shulei chou Shijian Zheng Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology School of Materials Science and EngineeringHebei University of TechnologyTianjin 300401China Institute for Carbon Neutralization Technology College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China

Microsized bismuth(Bi)with in-situ constructed three-dimensional(3D)porous network has been considered as a promising anode for high-performance potassium-ion batteries(PIBs).However,the mechanism of the in-situ porous evolution of microsized Bi during the charge/discharge process is still ***,various electrolytes are employed to disclose the origin of porous evolution of microsized Bi in *** and theoretically,the 3D porous network originates from the uniform interfacial charge distribution on the Bi surface in the linear ether-based *** addition,the universality of the interfacial charge distribution mechanism was verified by microsized Sn and *** in-situ constructed 3D porous network of Bi enables a superior potassium storage performance in a wide temperature range from-40 to 40℃.More importantly,the K_(0.9)Mn_(0.7)Ni_(0.3)O_(2)||Bi full cell delivers excellent cycling stability(a high capacity retention of 88.44%even after 2,000 cycles)and good temperature *** work gives a distinct clarification of the origin of the porous evolution of microsized Bi during cycling,which is critical for developing high-performance PIBs.

关键词： potassium-ion batteries microsized Bi porous evolution linear ether-based electrolyte interfacial charge distribution

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钢液中电化学脱氧新方法

钢铁 2010年第5期45卷 30-32,37页

作者：张国华周国治李丽芬胡晓军北京科技大学冶金与生态工程学院北京100083

提供了一种新的钢液无污染脱氧的方法。对比研究了在钢液与CaO(35%)-Al2O3(55%)-MgO(10%)(质量分数)熔渣间不加电压(断路),外加电压U=0.5 V和U=1.0 V 3种条件下的脱氧情况,试验结果表明脱氧速率随着外加电压的增加而增加。此外,推导并... 详细信息

提供了一种新的钢液无污染脱氧的方法。对比研究了在钢液与CaO(35%)-Al2O3(55%)-MgO(10%)(质量分数)熔渣间不加电压(断路),外加电压U=0.5 V和U=1.0 V 3种条件下的脱氧情况,试验结果表明脱氧速率随着外加电压的增加而增加。此外,推导并分析了电化学脱氧的机制方程,发现可以通过增强钢液搅拌强度,加大外加电压,选择高电导率、高碱度、低黏度的渣系,降低外电路电阻等措施来加快电化学脱氧的速度。

关键词：无污染脱氧溶解氧氧化锆固体电解质熔渣

Oxidation resistance,thermal expansion and area specific resistance of Fe-Cr alloy interconnector for solid oxide fuel cell

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Journal of Iron and Steel Research International 2017年第1期24卷 77-83页

作者： Liu-zhen Bian Zhi-yuan Chen Li-jun Wang Fu-shen Li kuo-chih chou State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China

It is promising for metal especially ferritic stainless steel（FSS）to be used as interconnector when the solid oxide fuel cell（SOFC）is operated at temperature lower than 800℃.However,there are many challenges for FSS such as anti-oxidant,poisoning to cathode and high area specific resistance（ASR）when using as SOFC *** effect of Cr content（12-30 mass%）in Fe-Cr alloys on thermal expansion coefficient（TEC）,oxidation resistance,microstructure of oxidation scale and ASR was investigated by thermo-gravimetry,scanning electron microscopy,energy dispersive spectroscopy and four-probe DC *** TEC of Fe-Cr alloys is（11-13）×10^（-6） K^（-1）,which excellently matches with other SOFC *** have excellent oxidation resistance when Cr content exceeds 22mass% because of the formation of chromium on the surface of *** oxidation rate constants kdand ksdecrease rapidly with increasing the Cr content and then increase slowly when the Cr content is higher than 22mass%.The kinetic results indicate that Cr evaporation must be considered at high temperature for Fe-Cr *** the alloys were oxidized in air at 800℃ for500 h,log（ASR/T）（Tis the absolute temperature）presents linear relationship with 1/T and the conduct activation energy is 0.6-0.8eV（Cr16-30）.Optimal Cr content is 22-26mass%considering the oxidation resistance and ASR.

关键词： Interconnector High temperature oxidation Solid oxide fuel cell Stainless steel Fe-Cr alloy

Interdiffusion in the Fe_2O_3-TiO_2 system

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International Journal of Minerals,Metallurgy and Materials 2013年第3期20卷 273-278页

作者： Zhong-shan Ren Xiao-jun Hu Shen-yang Li Xiang-xin Xue kuo-chih chou State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing School of Metallurgical Ecological Engineering University of Science and Technology Beijing School of Materials and Metallurgy Northeastern University

Interdiffusion in the Fe203-TiO2 system was investigated by the diffusion couple method in the temperature range of 1323 to 1473 K. The diffusion concentration curves of Ti4＋ cations were obtained by electron probe microanalysis, according to which the Boltzmann-Matano method optimized by Broeder was used to calculate the interdiffusion coeffi- cients. The interdiffusion coefficients almost increased linearly with the mole fraction of Ti4＋ cations increasing, and they were in the range of 10-12-10-11cm2-s-1. The increase of temperature could also lead to the increase of the interdiffusion coefficients at a constant concentration of Ti4＋ cations. It was also found that the thickness growth of the diffusion layer obeyed the parabolic rate law.

关键词： interdiffusion titanium dioxide iron oxides diffusion couples electron probe microanalysis

Dissolution and diffusion of TiO_2 in the CaO-Al_2O_3-SiO_2 slag

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International Journal of Minerals,Metallurgy and Materials 2014年第4期21卷 345-352页

作者： Zhong-shan Ren Xiao-jun Hu Xin-mei Hou Xiang-xin Xue kuo-chih chou State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing School of Metallurgical and Ecological Engineering University of Science and Technology Beijing School of Materials and Metallurgy Northeastern University

The dissolution of TiO2 in the CaO-Al2O3-SiO2 slag under static conditions was studied in the temperature range from 1643 K to 1703 K. After TiO2 dissolved, the microstructure of the interface between TiO2 and the slag was observed by scanning electron microscopy, and the concentration profiles of Ti4＋and other ions across the TiO2/slag interfaces were analyzed by energy-dispersive X-ray spectroscopy. On the basis of these results, the dissolution behavior of TiO2 was evaluated, and the diffusivity of Ti4＋in the bulk slag was estimated. Ac-cording to the Stokes-Einstein relation, the viscosity calculated by a previously reported model gave a diffusivity of Ti4＋ions greater than that estimated by the concentration profiles of Ti4＋ions. The mechanism of TiO2 dissolution in the CaO-Al2O3-SiO2 slag is discussed in de-tail.

关键词： slags titanium dioxide dissolution diffusion interface

Synthesis of Al_(4)SiC_(4) powders via carbothermic reduction: Reaction and grain growth mechanisms

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Journal of Advanced Ceramics 2017年第4期6卷 351-359页

作者： Xinming XING Junhong CHEN Guoping BEI Bin LI kuo-chih chou Xinmei HOU School of Material Science and Technology University of Science and Technology BeijingBeijing 100083China Department of Materials Science and Engineering 3MEDelft University of TechnologyDelft2628CDthe Netherlands State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

Highly pure Al_(4)SiC_(4) powders were prepared by carbothermic reduction at 2173 K using Al_(2)O_(3),SiO_(2),and graphite as raw *** obtained Al_(4)SiC_(4) powders owned hexagonal plate-like grains with a diameter of about 200-300μm and a thickness of about 2-6μ*** on the experimental results,the reaction of Al_(4)SiC_(4) formation and grain evolution mechanisms were determined from thermodynamic and first-principles *** results indicated that the synthesis of Al_(4)SiC_(4) by the carbothermic reduction consisted of two parts,i.e.,solid-solid reactions initially followed by complex gas-solid and gas-gas *** grain growth mechanism of Al_(4)SiC_(4) featured a two-dimensional nucleation and growth *** gas phases formed during the sintering process favored the preferential grain growth of(0010)and(110)planes resulting in formation of hexagonal plate-like Al_(4)SiC_(4) grains.

关键词： Al_(4)SiC_(4) carbothermic reduction hexagonal plate-like growth mechanism

First principles application for mechanical properties of Ti-doped W particles enhanced U matrix composite

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Rare Metals 2018年第9期37卷 815-822页

作者： Jian-Bo Qi Li-Li Ru Guang-Xin Wu Jie-Yu Zhang kuo-chih chou State Key Laboratory of Advanced Special Steel Shanghai University Institute of Metallurgy China North Nuclear Fuel Co. Ltd Department of Physical Chemistry University of Science and Technology Beijing

The stability, bonding, work of adhesion and electronic structure of the U/W interface with and without Ti were investigated by first principles to explore the me- chanical properties of W particles enhanced U-Ti alloy matrix composite as a construction material. The calculated results indicate that the preferable orientation of the U/W interfacial structure is （001）U/（110）w crystallographic plane, Ti atoms originating from U slab are prone to diffuse into W slab through the interface, and additional Ti in U matrix is the stronger adhesion to W, with an ideal work of adhesion of 6.93 J.m-2 for U-Ti/W interface, relative to the value of 6.72 J.m-2 for clean U/W interface. The stronger adhesion performance is due to the increase in valence electron hybridization for U-Ti/W compared with U/W interface, as evidenced by the characteristic of the local density of states for the interfacial atoms.

关键词： First principles U/W interface Diffuse Work of adhesion Electronic structure

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孟子性善论的伦理使命

东南大学学报（哲学社会科学版） 2024年第5期26卷 22-31,148页

作者：任丑西南大学国家治理学院重庆400715

孟子性善论试图打通天道与人道、真与善、外在环境与内在自我之间的鸿沟。此宏大的理论抱负集中体现为三大伦理使命:(一)人性存在论确立人性的本体根据,断定人性是人人生而固有的先天之心;(二)人性价值论肯定人性善是人性先天具有的、... 详细信息

孟子性善论试图打通天道与人道、真与善、外在环境与内在自我之间的鸿沟。此宏大的理论抱负集中体现为三大伦理使命:(一)人性存在论确立人性的本体根据,断定人性是人人生而固有的先天之心;(二)人性价值论肯定人性善是人性先天具有的、源自“四心”的道德价值,是不受任何外在因素影响的内在善,是人之为人的内在价值;(三)人性方法论主张人性善的实践程序是天道通过君子实践人道,也就是说,君子秉承天道,自觉地保持善、追求善、彰显善。孟子性善论既有其生命力与合理性,亦有其不足之处。其伦理使命的当下践行,尚需注入新的时代要素。

关键词：性善论人性存在论人性价值论人性方法伦理使命

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