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Formation of novel TRIP-ductilized bulk metallic glass composites by manipulating nucleation kinetics via minor alloying

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Rare Metals 2023年第7期42卷 2182-2188页

作者： Xi-Lai Jiang Wen-Li Song Ming Yang Yuan-Bo Zhou Yan Huang Zhi-Chao Lu Yi-Bo Zhang Jie Dong Liang Wang Bo Peng Chun-Ming Hu jin-kui zhao Sheng-Zhong Kou Dong Ma School of Materials Science and Engineering Lanzhou University of TechnologyLanzhou730050China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing100049China Spallation Neutron Source Science Center Dongguan523803China Neutron Science Platform Songshan Lake Materials LaboratoryDongguan523808China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing100083China Institute of Physics Chinese Academy of Sciences(CAS)Beijing100190China

A series of conical bulk metallic glass composites(BMGCs)with compositions of Zr_(47)Cu_(47-x)Al_(5)Ag_(1)Ga_(x)(x=0,1,2,4;at%)were synthesized using the minor alloying method to investigate the effect of Ga addition ... 详细信息

关键词： alloying properties glass

介孔SBA-15/SiO_2气凝胶硅--硅复合材料的制备和性能

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工程科学学报 2016年第2期38卷 270-275页

作者：彭超豪杨穆栾奕金召奎谭僖北京科技大学材料科学与工程学院北京100083

以有序介孔二氧化硅颗粒SBA-15为添加剂,利用酸碱两步法制备SBA-15/SiO_2气凝胶硅-硅复合材料.研究SBA-15添加量对气凝胶复合材料的形成过程和性能的影响,采用扫描电镜和氮气吸附-脱附对样品的结构进行表征,并测试其力学性能和热导率.... 详细信息

以有序介孔二氧化硅颗粒SBA-15为添加剂,利用酸碱两步法制备SBA-15/SiO_2气凝胶硅-硅复合材料.研究SBA-15添加量对气凝胶复合材料的形成过程和性能的影响,采用扫描电镜和氮气吸附-脱附对样品的结构进行表征,并测试其力学性能和热导率.结果表明:少量有序介孔二氧化硅材料SBA-15的加入能大大缩短二氧化硅气凝胶形成时间,提高气凝胶复合材料的力学性能,并保持较低的热导率,而材料的比表面积仅略有下降.

关键词：气凝胶二氧化硅介孔材料制备方法力学性能热导率

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本安型交换机电源抗辐射设计

煤矿机械 2018年第3期39卷 15-17页

作者：张金豪贺奎赵光绪中煤科工集团重庆研究院有限公司重庆400039 瓦斯灾害监控与应急技术国家重点实验室重庆400037

针对煤矿井下本安型交换机受到电磁辐射干扰使电源产生瞬间电压跌落,导致交换机重启或者死机等问题,研制了一种升压降压电源模块,通过升压后再降压的方式,消除电磁辐射对交换机的影响。该电源电路从输入电压范围、输入本安电源的保护、... 详细信息

针对煤矿井下本安型交换机受到电磁辐射干扰使电源产生瞬间电压跌落,导致交换机重启或者死机等问题,研制了一种升压降压电源模块,通过升压后再降压的方式,消除电磁辐射对交换机的影响。该电源电路从输入电压范围、输入本安电源的保护、升压电路、降压电路以及电路保护研究,采用模块灌封的模式。通过试验发现,该电路负载的本质安全型交换机能抵抗多种角度4级电磁辐射干扰,保证本质安型交换机的正常运行,保证了煤矿井下数据通信的正常运行。

关键词：抗辐射升降压电路本安参数磁环过压保护

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历史虚无主义的表征、根源及防范化解研究

新疆师范大学学报（哲学社会科学版） 2025年第2期46卷 152-158页

作者：赵军魁甘肃政法大学马克思主义学院甘肃兰州730070 甘肃政法大学思想政治教育研究中心甘肃兰州730070

历史虚无主义以误导性的历史观及价值取向对历史理解和民族文化自信构成消解与威胁。文本坚持历史唯物主义和大历史观,深入探讨历史虚无主义的表征、根源及其对社会文化的危害,并提出相应的防范化解策略。通过加强历史教育与研究、坚持... 详细信息

历史虚无主义以误导性的历史观及价值取向对历史理解和民族文化自信构成消解与威胁。文本坚持历史唯物主义和大历史观,深入探讨历史虚无主义的表征、根源及其对社会文化的危害,并提出相应的防范化解策略。通过加强历史教育与研究、坚持文化传承与创新、抓好媒体监管与引导、重视国际交流与合作等途径有效防范化解历史虚无主义,以正确的理论和舆论引领社会思潮,筑牢全国各族人民共同思想政治基础,增强道路自信、理论自信、制度自信和文化自信。

关键词：历史虚无主义表现形态根源与危害应对策略

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纤维复合二氧化硅气凝胶材料的制备

功能材料 2014年第16期45卷 16139-16142页

作者：谭僖杨穆高鸿毅栾奕金召奎阿南冯妍卉冯黛丽北京科技大学材料科学与工程学院北京100083 北京科技大学机械工程学院北京100083

二氧化硅气凝胶是一种轻质多孔结构材料,具有良好的绝热性能,但其存在机械性能较差的缺点。在溶胶-凝胶法制备气凝胶的过程中,通过对凝胶时间的调控,将高纯二氧化硅玻璃纤维复合于二氧化硅气凝胶中,然后分别采用常压干燥和超临界干燥两... 详细信息

二氧化硅气凝胶是一种轻质多孔结构材料,具有良好的绝热性能,但其存在机械性能较差的缺点。在溶胶-凝胶法制备气凝胶的过程中,通过对凝胶时间的调控,将高纯二氧化硅玻璃纤维复合于二氧化硅气凝胶中,然后分别采用常压干燥和超临界干燥两种方法制备了气凝胶块体样品。通过X射线衍射(XRD)、比表面积测试(BET)、压汞法(MIP)、场发射扫描电镜(FESEM)、热导率等实验手段对制得的样品进行表征和分析,并与纯二氧化硅气凝胶进行对照。结果表明,复合材料在保持较高比表面积、低密度和低热导率的同时,有效地改善了气凝胶的抗弯曲性能。

关键词：纤维二氧化硅气凝胶复合材料低热导率低密度

Unlocking the stable interface in aqueous zinc-ion battery with multifunctional xylose-based electrolyte additives

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Journal of Energy Chemistry 2025年第1期100卷 770-778页

作者： Xiaoqin Li Jian Xiang Lu Qiu Xiaohan Chen Yinkun zhao Yujue Wang Qu Yue Taotao Gao Wenlong Liu Dan Xiao zhaoyu jin Panpan Li Institute for Advanced Study Chengdu University School of Mechanical Engineering Chengdu University College of Food and Biological Engineering Chengdu University Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China College of Materials Science and Engineering Sichuan University

The growth of dendrites and the side reactions occurring at the Zn anode pose significant challenges to the commercialization of aqueous Zn-ion batteries（AZIBs）. These challenges arise from the inherent conflict between mass transfer and electrochemical kinetics. In this study, we propose the use of a multifunctional electrolyte additive based on the xylose（Xylo） molecule to address these issues by modulating the solvation structure and electrode/electrolyte interface, thereby stabilizing the Zn anode. The introduction of the additive alters the solvation structure, creating steric hindrance that impedes charge transfer and then reduces electrochemical kinetics. Furthermore, in-situ analyses demonstrate that the reconstructed electrode/electrolyte interface facilitates stable and rapid Zn2+ion migration and suppresses corrosion and hydrogen evolution reactions. As a result, symmetric cells incorporating the Xylo additive exhibit significantly enhanced reversibility during the Zn plating/stripping process, with an impressively long lifespan of up to 1986 h, compared to cells using pure ZnSO4electrolyte. When combined with a polyaniline cathode, the full cells demonstrate improved capacity and long-term cyclic stability. This work offers an effective direction for improving the stability of Zn anode via electrolyte design, as well as highperformance AZIBs.

关键词： Solvation

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

A mechanical reinforced and antifreezing polyacrylate hydrogel electrolyte for high-performance zinc-ion batteries

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Nano Research 2025年第1期18卷 341-350页

作者： Zili Zhang Ruolin Wang Hongfei Lu Di Zhang Yu zhao jing Xu Bin Sun Zhi-Min Dang Yang jin School of Electrical and Information Engineering Zheng Zhou UniversityZhengzhou 450001China State Key Lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

The operation of aqueous zinc-ion batteries in flexible energy storage field is plagued by the uncontrollable growth of Zn-dendrite and inevitable freeze of water below 0 ℃.Therefore,it is necessary to design a hydrogel electrolyte with good mechanical property and freezing resistance to uniform the Zn-deposition and resist flexibility loss at low *** find that the mechanical property(strength and toughness)of hydrogel electrolyte has a significant impact on the suppression of dendrite growth and the uniform deposition of zinc ***,a polyacrylate hydrogel is prepared in one step by ultraviolet(UV)curing method with Zn(CF_(3)SO_(3))_(2)salt and polyvinyl alcohol(PVA)addition to increase the antifreezing ability and mechanical *** adsorption of water molecules by 2-hydroxyethyl acrylate(HEA)and PVA reduces the freezing point of the hydrogel,which is beneficial for enhancing the electrochemical stability at low *** this basis,the Zn-symmetrical battery with hydrogel electrolyte has a long lifespan of 4710 h at 0.5 mA·cm^(-2)and 0.5 mAh·cm^(-2)at room ***,the hydrogel electrolyte exhibits an outstanding stability at low temperature of^(-2)0 ℃,the lifespan of symmetrical battery reaches to 4000 h at 0.5 mA·cm^(-2)and 0.5 mAh·cm^(-2).The assembled full cell with NaV3O8·1.5H_(2)O(NVO)cathode and hydrogel electrolyte possesses a high capacity retention ratio of 77%after 10,000 cycles at^(-2)0 ℃.The flexible cell can power light-emitting diode(LED)lamp under bending,warping and cutting without liquid leakage and an electronic watch at the operating temperature of^(-2)0 ℃.

关键词： zinc ion battery hydrogel electrolyte mechanical enhancement freezing resistance

Dember effect induced photovoltage in Oxide p-n junctions

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Dember effect induced photovoltage in Oxide p-n junctions