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Journal of Wuhan University of Technology(Materials Science) 2019年第6期34卷 1421-1428页

作者： GAO Xianhui WU Jinjin zhao lianquan Analytical and Testing Center Huazhong University of Science and TechnologyWuhan 430074China

The grain refinement mechanism and texture evolution of electromagnetically formed polycrystalline Cu sheets were investigated using the electron back-scattered diffraction(EBSD) technique. It is found that the average grain size decreases from 35.88 μm to 8.77 μm. The grain refinement was mainly attributed to dynamic recrystallization(DRX) at the grain boundary regions of bulged Cu samples where the inhomogeneous dislocation density and the large lattice misorientation were observed. The DRX mechanisms at the grain boundaries were discussed with respect to the strain-induced grain boundary migration nucleation. Moreover, the orientation distribution function(ODF) of the sample with the strain of 50% demonstrated a strong {110} texture and a relatively weak {001} texture. The texture evolution was discussed using the plastic work values of the grains with various orientations, which were calculated according to the Taylor model and the virtual work principle. The experimental results show that the expended plastic work of the grains with {110} orientation is 9.69 MPa, which is distinctly higher than those of the grains with the {001} and {111} orientations. This indicates that the formation of the {110} orientated texture would be preferred with increasing strain in good agreement with the experimental result.

关键词： grain refinement texture electrom agnetic forming electron back-scattered diffraction

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用于煤气化CO_2还原反应的一种催化剂

燃料化学学报 1990年第4期18卷 382-384页

作者：赵连权储绍彬中国科学院化工冶金研究所

C+CO_2 2CO是煤气化中一个重要的基本反应,对该反应能否产生有效的催化作用是选择催化剂的重要依据。迄今,对K_2CO_3、Na_2CO_3等研究较多,它们具有很高的催化活性,但用量大,不易回收。碱土金属、过渡金属及其化合物用量少,价廉,但活性... 详细信息

C+CO_2 2CO是煤气化中一个重要的基本反应,对该反应能否产生有效的催化作用是选择催化剂的重要依据。迄今,对K_2CO_3、Na_2CO_3等研究较多,它们具有很高的催化活性,但用量大,不易回收。碱土金属、过渡金属及其化合物用量少,价廉,但活性低。近几年关于混合物对煤气化的催化作用有不少报道。

关键词：煤气化 CO2 还原反应催化剂

Q235、Q345和BC550钢在不同酸碱度溶液中的腐蚀和磨蚀研究

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上海金属 2020年第2期42卷 33-38页

作者：张欧张明明于俊赵连全骆毅李伟上海环境物流有限公司上海200063 上海交通大学材料科学与工程学院上海200240

目前,垃圾运输和处理设施主要采用Q235钢制作,因腐蚀而损坏的情况严重。为了研究不同的钢在不同腐蚀介质中的腐蚀行为,探索耐垃圾腐蚀的材料,除了采用扫描电镜和能谱分析检验显微组织、通过拉伸试验测定力学性能外,对Q235、Q345和BC550... 详细信息

目前,垃圾运输和处理设施主要采用Q235钢制作,因腐蚀而损坏的情况严重。为了研究不同的钢在不同腐蚀介质中的腐蚀行为,探索耐垃圾腐蚀的材料,除了采用扫描电镜和能谱分析检验显微组织、通过拉伸试验测定力学性能外,对Q235、Q345和BC550钢在3.5%NaCl溶液和3.5%NaCl+0.2 mol/L H2SO4混合液中进行了电化学腐蚀试验,在碱性、中性和酸性溶液中进行了摩擦磨损试验。结果表明:3种钢中耐蚀性能和力学性能最佳的是BC550钢,其腐蚀电流密度和抗拉强度分别为13.098μA·cm^-2和557 MPa。在中性和碱性介质中,Q235、Q345和BC550钢均具有良好的耐磨蚀性能;而在酸性介质中,BC550钢的摩擦磨损质量损失最小,为40.4 mg,耐磨蚀性最好。

关键词： Q235钢力学性能耐蚀性能磨蚀

Understanding the local structure and thermophysical behavior of Mg-La liquid alloys via machine learning potential

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 439-449页

作者： Jia zhao Taixi Feng Guimin Lu National Engineering Research Center for Integrated Utilization of Salt Lake Resource East China University of Science and TechnologyShanghai 200237China Joint International Laboratory for Potassium and Lithium Strategic Resources East China University of Science and TechnologyShanghai 200237China

The local structure and thermophysical behavior of Mg-La liquid alloys were in-depth understood using deep potential molecular dynamic(DPMD) simulation driven via machine learning to promote the development of Mg-La alloys. The robustness of the trained deep potential(DP) model was thoroughly evaluated through several aspects, including root-mean-square errors(RMSEs), energy and force data, and structural information comparison results;the results indicate the carefully trained DP model is reliable. The component and temperature dependence of the local structure in the Mg-La liquid alloy was analyzed. The effect of Mg content in the system on the first coordination shell of the atomic pairs is the same as that of temperature. The pre-peak demonstrated in the structure factor indicates the presence of a medium-range ordered structure in the Mg-La liquid alloy, which is particularly pronounced in the 80at% Mg system and disappears at elevated temperatures. The density, self-diffusion coefficient, and shear viscosity for the Mg-La liquid alloy were predicted via DPMD simulation, the evolution patterns with Mg content and temperature were subsequently discussed, and a database was established accordingly. Finally, the mixing enthalpy and elemental activity of the Mg-La liquid alloy at 1200 K were reliably evaluated,which provides new guidance for related studies.

关键词： magnesium-lanthanum liquid alloys local structure macroscopic properties thermodynamic behavior deep potential mo-lecular dynamic simulation

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稀土氧化物与二氧化硫反应的热力学研究

稀土 1997年第3期18卷 18-22页

作者：张世超刘葆俊李洪钟赵连权北京航空航天大学中国科学院化工冶金研究所

本文对稀土氧化物与ＳＯ２的气固相反应进行了系统的热力学计算研究，得到了系统化的含硫气体平衡分压曲线；研究表明，从热力学上讲，当温度低于２３７℃时，所有稀土氧化物都可作为烟道气干法脱硫的吸收剂；可以使用ＣｅＯ２通过干吸... 详细信息

本文对稀土氧化物与ＳＯ２的气固相反应进行了系统的热力学计算研究，得到了系统化的含硫气体平衡分压曲线；研究表明，从热力学上讲，当温度低于２３７℃时，所有稀土氧化物都可作为烟道气干法脱硫的吸收剂；可以使用ＣｅＯ２通过干吸收生成Ｃｅ（ＳＯ４）２和热再生循环过程实现固体再生干法脱除烟气中的ＳＯ２，其吸收ＳＯ２和再生ＣｅＯ２的温度范围分别为１００～４４０℃和７１５～８６５℃。

关键词：稀土氧化物二氧化硫热力学烟气脱硫干法

Unraveling the significance of cobalt on transformation kinetics,crystallography and impact toughness in high-strength steels

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 380-390页

作者： Yishuang Yu Jingxiao zhao Xuelin Wang Hui Guo Zhenjia Xie Chengjia Shang Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China

This work reveals the significant effects of cobalt(Co)on the microstructure and impact toughness of as-quenched highstrength steels by experimental characterizations and thermo-kinetic *** results show that the Co-bearing steel exhibits finer blocks and a lower ductile-brittle transition temperature than the steel without ***,the Co-bearing steel reveals higher transformation rates at the intermediate stage with bainite volume fraction ranging from around 0.1 to *** improved impact toughness of the Co-bearing steel results from the higher dense block boundaries dominated by the V1/V2 variant ***,the addition of Co induces a larger transformation driving force and a lower bainite start temperature(BS),thereby contributing to the refinement of blocks and the increase of the V1/V2 variant *** findings would be instructive for the composition,microstructure design,and property optimization of high-strength steels.

关键词： high-strength steel cobalt transformation kinetics crystallography impact toughness

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污泥填埋库区竖向堆高增容中试试验研究

环境卫生工程 2019年第6期27卷 49-52,56页

作者：张美兰毛忠荣张军唐文荣唐佶赵连全上海老港废弃物处置有限公司科信部上海老港废弃物处置有限公司上海201302 上海城投环境(集团)有限公司上海200333

针对上海市60%含水率污泥的填埋容量不足的问题,探索老港综合填埋场污泥填埋库区竖向堆高增容的关键技术问题。实施了中试试验,通过原位加固、土工格栅“蜂窝状”加固,提升已填埋污泥的强度和承载力;通过高强土工布分层加筋,提升竖向堆... 详细信息

针对上海市60%含水率污泥的填埋容量不足的问题,探索老港综合填埋场污泥填埋库区竖向堆高增容的关键技术问题。实施了中试试验,通过原位加固、土工格栅“蜂窝状”加固,提升已填埋污泥的强度和承载力;通过高强土工布分层加筋,提升竖向堆高污泥堆体的强度和稳定性,成功实现了竖向堆高10m作业。基于中试试验结果给出了稳定评估验算时各类污泥土体强度的建议取值,并提出了竖向堆高增容的设计思路。

关键词： 60%含水率污泥填埋竖向增容原位加固加筋

High-temperature-tolerant flexible supercapacitors: Gel polymer electrolytes and electrode materials

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Journal of Energy Chemistry 2025年第1期100卷 426-457页

作者： Chong Peng Xinyi Huang Mingwei zhao Shuling Liao Quanhong Yang Nianjun Yang Siyu Yu School of Chemistry & Chemical Engineering Southwest University Nanoyang Group Tianjin Key Laboratory of Advanced Carbon and Electrochemical Energy Storage School of Chemical Engineering and Technology and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin University Department of Chemistry & IMO-IMOMEC Hasselt University

The development of flexible supercapacitors(FSCs) capable of operating at high temperatures is crucial for expanding the application areas and operating conditions of supercapacitors. Gel polymer electrolytes and electrode materials stand as two key components that significantly impact the efficacy of hightemperature-tolerant FSCs(HT-FSCs). They should not only exhibit high electrochemical performance and excellent flexibility, but also withstand intense thermal stress. Considerable efforts have been devoted to enhancing their thermal stability while maintaining high electrochemical and mechanical performance. In this review, the fundamentals of HT-FSCs are outlined. A comprehensive overview of state-of-the-art progress and achievements in HT-FSCs, with a focus on thermally stable gel polymer electrolytes and electrode materials is provided. Finally, challenges and future perspectives regarding HT-FSCs are discussed, alongside strategies for elevating operational temperatures and *** review offers both theoretical foundations and practical guidelines for designing and manufacturing HT-FSCs, further promoting their widespread adoption across diverse fields.

关键词： Flexible supercapacitors High-temperature tolerance Gel polymer electrolytes Electrode materials

Decision making module based on stochastic magnetic tunnel junctions

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 202-209页

作者： Yifan Miao Li zhao Yajun Zhang Zhe Yuan Center for Advanced Quantum Studies and Department of Physics Beijing Normal University Institute for Nanoelectric Devices and Quantum Computing Fudan University Interdisciplinary Center for Theoretical Physics and Information Sciences Fudan University

In biological neural systems, noise is ubiquitous but does not affect the correct decisions made in the complex cognitive ***-making in biological neural system is typically achieved by accumulating input information over a period of *** by recent developments in neurosciences, we design a decision-making module based on spintronic devices, utilizing superparamagnetic tunnel junctions as artificial neurons. The feasibility of this decision-making module is verified through circuit simulations. Taking a multi-layer perceptron as an example, the module significantly improves the accuracy of the perceptron in the handwritten digit recognition task. Furthermore, the spintronic decision-making module offers advantages over the conventional pooling methods, such as adaptive decision time, high performance and the absence of analog-to-digital conversion. The decision-making module is flexible to be integrated into artificial neural networks and provides a general yet effective solution to enhance performance against device noise.

关键词： neuromorphic computing spintronics magnetic tunnel junction neural networks

Low-cost and fluoride-free synthesis of MFI zeolite nanosheets with enhanced stability for benzene alkylation with ethanol

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Journal of Energy Chemistry 2025年第1期100卷 458-468页

作者： Peng Zhu Cun Liu Yiren Yu Guoshu Gao Yumeng zhao Xiongfu Zhang Guodong Liu Guohui Yang State Key Laboratory of Fine Chemicals School of Chemical Engineering Dalian University of Technology State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences

Zeolite nanosheets with a short b-axis thickness are highly desirable in lots of catalytic reactions due to their reduced diffusion resistance. Nevertheless, conventional synthesis methods usually require expensive structure-directing agents(SDAs), pricey raw materials, and eco-unfriendly fluorine-containing additives. Here, we contributed a cost-effective and fluoride-free synthesis method for synthesizing high-quality MFI zeolite nanosheets through a Silicalite-1(Sil-1) seed suspension and urea cooperative strategy, only with inexpensive colloidal silica as the Si source. Our approach was effective for synthesizing both Sil-1 and aluminum-containing ZSM-5 nanosheets. By optimizing key synthesis parameters,including seed aging time, seed quantity, and urea concentration, we achieved precise control over the crystal face aspect ratio and b-axis thickness. We also revealed a non-classical oriented nanosheet growth mechanism, where Sil-1 seeds induced the formation of quasi-ordered precursor particles, and the(010)crystal planes of these particles facilitated urea adsorption, thereby promoting c-axis-oriented *** obtained ZSM-5 nanosheets exhibited exceptional catalytic performance in the benzene alkylation with ethanol, maintaining stability for over 500 h, which is 5 times longer than traditional ZSM-5 catalysts. Furthermore, large-scale production of ZSM-5 nanosheets was successfully carried out in a 3 L highpressure autoclave, yielding samples consistent with those from laboratory-scale synthesis. This work marks a significant step forward in the sustainable and efficient production of MFI nanosheets using inexpensive and environmentally friendly raw materials, offering the broad applicability in catalysis.

关键词： MFI zeolite ZSM-5 Nanosheets Scale-up synthesis Aromatic alkylation