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Critical state-induced emergence of superior magnetic performances in an iron-based amorphous soft magnetic composite

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Materials Futures 2024年第2期3卷 149-160页

作者： Liliang Shao Rongsheng Bai Yanxue Wu Jing Zhou Xing Tong Hailong Peng Tao Liang Zongzhen Li Qiaoshi Zeng Bo Zhang Haibo Ke weihua Wang Songshan Lake Materials Laboratory Dongguan 523808People’s Republic of China institute of Physics Chinese Academy of SciencesBeijing 100190People’s Republic of China School of energy Power and Mechanical EngineeringNorth China Electric Power UniversityBeijing 100096People’s Republic of China School of Materials Science and Engineering Central South UniversityChangsha 410083People’s Republic of China Center for High Pressure Science and Technology Advanced research Shanghai 201203People’s Republic of China Jiangsu JITRI Advanced energy Materials research institute Co. LtdChangzhou 213000People’s Republic of China

Soft magnetic composites(SMCs)play a pivotal role in the development of high-frequency,miniaturization and complex forming of modern ***,they usually suffer from a trade-off between high magnetization and good magnetic softness(high permeability and low core loss).In this work,utilizing the order modulation strategy,a critical state in a FeSiBCCr amorphous soft magnetic composite(ASMC),consisting of massive crystal-like orders(CLOs,∼1 nm in size)with the feature ofα-Fe,is *** critical-state structure endows the amorphous powder with the enhanced ferromagnetic exchange interactions and the optimized magnetic domains with uniform orientation and fewer micro-vortex *** comprehensive soft magnetic properties at high frequency emerge in the ASMC,such as a high saturation magnetization(Ms)of 170 emu g^(-1)and effective permeability(µ_(e))of 65 combined with a core loss(Pcv)as low as 70 mW cm^(-3)(0.01 T,1 MHz).This study provides a new strategy for the development of high-frequency ASMCs,possessing suitable comprehensive soft magnetic performance to match the requirements of the modern magnetic devices used in the third-generation semiconductors and new energy fields.

关键词： amorphous soft magnetic composites critical state soft magnetic property rotating magnetic field annealing magnetic domain

Emerging high-entropy material electrodes for metal-ion batteries

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SusMat 2024年第4期4卷 152-174页

作者： Jianyu Shen Zhen Zeng weihua Tang College of Materials Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM)Institute of Flexible Electronics(Future Technologies)Xiamen UniversityXiamenChina

High-entropy materials(HEMs)have recently attracted extensive research *** unique structural characteristics and excellent mechan-ical/chemical properties,HEMs(especially high-entropy alloys and oxides)emerge as promising electrode materials for electrochemical energy *** herein present a critical review to update the recent progress in develop-ing new HEMs electrodes for various metal-ion *** design principle is discussed along with the preparation,characterization,and electrochemical performance as electrode *** current state-of-the-art HEM electrodes is presented,covering good capacity,rate capacity,and long-term cycle stability in ion *** addressing both the success and challenges associated with HEM development,this review contributes to the recent research efforts toward achieving higher capacity and more stable ion batteries.

关键词： high-entropy electrodes metal-ion battery energy storage

Metal organic frameworks-based cathode materials for advanced Li-S batteries: A comprehensive review

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Nano research 2024年第4期17卷 2592-2618页

作者： Zhengkun Xie Boyong Cao Xiyan Yue Ruixue Wang Ziqian Xue Jiajia Wang Guoqing Guan weihua Chen College of Chemistry Zhengzhou UniversityZhengzhou 450001China School of Ecology and Environment Zhengzhou UniversityZhengzhou 450001China School of Materials Science and Engineering Henan Polytechnic UniversityJiaozuo 454003China Laboratory of energy Conversion Engineering Institute of Regional InnovationHirosaki University3 Bunkyo-choHirosakiAomori 036-8561Japan institute for Integrated Cell-Material Sciences(iCeMS) Kyoto UniversitySakyo-kuKyoto 606-8501Japan Key Laboratory of Advanced energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071China

Li-S batteries(LSBs)have been considering as new and promising energy storage systems because of the high theoretical energy density and low ***,their practical application is inhibited by several factors,including poor electrical conductivity of electrode materials,greatly volumetric variation,as well as the polysulfide formation upon the *** address these problems,it is imperative to develop and design effective and suitable sulfur host anode *** organic frameworks(MOFs)-based cathode materials,possessing their good conductivity and easy morphology design,have been extensively studied and exhibited enormously potential in *** this review,a comprehensive overview of MOFs-based sulfur host materials is provided,including their electrochemical reaction mechanisms,related evaluation parameters,and their performances used in LSBs in the past few *** particular,the recent advances using in-situ characterization technologies for investigating the electrochemical reaction mechanism in LSBs are presented and ***,the challenges and prospects associated with future research on MOF-related sulfur host materials are *** is anticipated to offer the guidance for the identification of suitable MOFs-based sulfur cathode materials for high-performance LSBs,thereby contributing for the achievement of a sustainable and renewable society.

关键词： lithium metal anode sulfur cathode metal organic frameworks host energy density in-situ characterization

Cross section measurement for the^(232)Th(n,f)reaction in the 4.50−5.40 MeV region using a time projection chamber

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Chinese Physics C 2024年第10期48卷 157-167页

作者： Haofan Bai Han Yi Yankun Sun Yiwei Hu Jie Liu Zepeng Wu Cong Xia Wenkai Ren Wentian Cao Tieshuan Fan Guohui Zhang Ruirui Fan Yang Li Wei Jiang Yonghao Chen You Lv Changjun Ning weihua Jia Zhiyong Zhang Haolei Chen Zhen Chen Maoyuan Zhao Changqing Feng Shubin Liu State Key Laboratory of Nuclear Physics and Technology Institute of Heavy Ion PhysicsPeking UniversityBeijing 100871China institute of High energy Physics Chinese Academy of SciencesBeijing 100049China Spallation Neutron Source Science Center Dongguan 523803China National Key Laboratory of Intense Pulsed Radiation Simulation and Effect Northwest Institute of Nuclear TechnologyXi'an 710024China Department of Nuclear Science and Technology School of Energy and Power EngineeringXi’an Jiaotong UniversityXi’an 710049China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China

Accurate cross sections of neutron induced fission reactions are required in the design of advanced nuclear systems and the development of fission *** projection chambers(TPCs),with their track reconstruction and particle identification capabilities,are considered the best detectors for high-precision fission cross section *** TPC developed by the back-streaming white neutron source(Back-n)team of the China Spallation Neutron Source(CSNS)was used as the fission fragment detector in *** this study,the cross sections of the ^(232)Th(n,f)reaction at five neutron energies in the 4.50−5.40 MeV region were *** fission fragments and α particles were well identified using our TPC,which led to a higher detection efficiency of the fission fragments and smaller uncertainty of the measured cross *** is the first measurement of the ^(232)Th(n,f)reaction using a TPC for the detection of fission *** uncertainties less than 5%,our cross sections are consistent with the data in different evaluation libraries,including JENDL-4.0,ROSFOND-2010,CENDL-3.2,ENDF/B-VⅢ.0,and BROND-3.1,whose uncertainties can be reduced after future improvement of the measurement.

关键词： ^(232)Th(n,f)fission cross section time projection chamber(TPC) ^(232)Th

Polyzwitterionic cross-linked double network hydrogel electrolyte enabling high-stable Zn anode

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Nano research 2024年第6期17卷 5278-5287页

作者： Mengyu Shi Junlong Zhang Guochuan Tang Ben Wang Sen Wang Xiaoxian Ren Guojie Li weihua Chen Chuntai Liu Changyu Shen State Key Laboratory of Structural Analysis Optimization and CAE Software for Industrial EquipmentNational Engineering Research Center for Advanced Polymer Processing TechnologyZhengzhou UniversityZhengzhou 450002China College of Chemistry and Green Catalysis Center Zhengzhou UniversityZhengzhou 450001China research institute of Interdisciplinary Science and School of Materials Science and Engineering Dongguan University of TechnologyDongguan 523808China

Zn metal anode suffers from dendrite issues and passive byproducts,which severely plagues the practical application of aqueous Zn metal ***,a polyzwitterionic cross-linked double network hydrogel electrolyte composed of physical crosslinking(hyaluronic acid)and chemical crosslinking(synthetic zwitterionic monomer copolymerized with acrylamide)is introduced to overcome these *** the one hand,highly hydrophilic physical network provides an energy dissipation channel to buffer stress and builds a H_(2)O-poor interface to avoid side *** the other hand,the charged groups(sulfonic and imidazolyl)in chemical crosslinking structure build anion/cation transport channels to boost ions’kinetics migration and regulate the typical solvent structure[Zn(H_(2)O)_(6)]^(2+)to R-SO_(3)^(−)[Zn(H_(2)O)_(4)]^(2+),with uniform electric field distribution and significant resistance to dendrites and parasitic *** on the above functions,the symmetric zinc cell exhibits superior cycle stability for more than 420 h at a high current density of 5 mA·cm^(−2),and Zn||MnO_(2)full cell has a reversible specific capacity of 150 mAh·g^(−1)after 1000 cycles at 2 C with this hydrogel ***,the pouch cell delivers impressive flexibility and cyclability for energy-storage applications.

关键词： Zn anode dendrites parasitic reactions polyzwitterion double network hydrogel electrolyte

Einstein Probe discovery of EP240408a:A peculiar X-ray transient with an intermediate timescale

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Science China(Physics,Mechanics & Astronomy) 2024年

作者： Wenda Zhang Weimin Yuan Zhixing Ling Yong Chen Nanda Rea Arne Rau Zhiming Cai Huaqing Cheng Francesco Coti Zelati Lixin Dai Jingwei Hu Shumei Jia Chichuan Jin Dongyue Li Paul O’Brien Rongfeng Shen Xinwen Shu Shengli Sun Xiaojin Sun Xiaofeng Wang Lei Yang Bing Zhang Chen Zhang Shuang-Nan Zhang Yonghe Zhang Jie An David Buckley Alexis Coleiro Bertrand Cordier Liming Dou Rob Eyles-Ferris Zhou Fan Hua Feng Shaoyu Fu Johan P. U. Fynbo Lluis Galbany Saurabh W. Jha Shuaiqing Jiang Albert Kong Erik Kuulkers weihua Lei Wenxiong Li Bifang Liu Mingjun Liu Xing Liu Yuan Liu Zhu Liu Chandreyee Maitra Alessio Marino Itumeleng Monageng Kirpal Nandra Jeremy Sanders Roberto Soria Lian Tao Junfeng Wang Song Wang Tinggui Wang Zhongxiang Wang Qingwen Wu Xuefeng Wu Dong Xu Yanjun Xu Suijian Xue Yongquan Xue Zijian Zhang Zipei Zhu Hu Zou Congying Bao Fansheng Chen Houlei Chen Tianxiang Chen Wei Chen Yehai Chen Yifan Chen Chenzhou Cui Weiwei Cui Yanfeng Dai Dongwei Fan Ju Guan Dawei Han Dongjie Hou Haibo Hu Maohai Huang Jia Huo Zhenqing Jia Bowen Jiang Ge Jin Chengkui Li Junfei Li Longhui Li Maoshun Li Wei Li Zhengda Li Tianying Lian Congzhan Liu Heyang Liu Huaqiu Liu Fangjun Lu Laidan Luo Jia Ma Xuan Mao Haiwu Pan Xin Pan Liming Song Hui Sun Yunyin Tan Qingjun Tang Yihan Tao Hao Wang Juan Wang Lei Wang Wenxin Wang Yilong Wang Yusa Wang Qinyu Wu Haitao Xu Jingjing Xu Xinpeng Xu Yunfei Xu Zhao Xu Changbin Xue Yulong Xue Ailiang Yan Haonan Yang Xiongtao Yang Yanji Yang Juan Zhang Mo Zhang Wenjie Zhang Zhen Zhang Zhen Zhang Ziliang Zhang Donghua Zhao Haisheng Zhao Xiaofan Zhao Zijian Zhao Hongyan Zhou Yilin Zhou Yuxuan Zhu Zhencai Zhu Institut d’Estudis Espacials de Catalunya (IEEC) Max Planck institute for Extraterrestrial Physics Innovation Academy for Microsatellites Chinese Academy of Sciences Department of Physics University of Hong Kong School of Physics and Astronomy University of Leicester School of Physics and Astronomy Sun Yat-sen University National Astronomical Observatories Department of Physics Anhui Normal University Shanghai institute of Technical Physics Chinese Academy of Sciences Physics Department Tsinghua University Nevada Center for Astrophysics University of Nevada Las Vegas Department of Physics and Astronomy University of Nevada Las Vegas Chinese Academy of Sciences South African Astronomical Observatory Department of Astronomy University of Cape Town Department of Physics University of the Free State Universite' Paris Cite' CNRS Astroparticule et Cosmologie Universite' Paris Cite' CEA Paris-Saclay School of Astronomy and Space Sciences IRFU/DAp-AIM Department of Astronomy Guangzhou University Cosmic Dawn Center (DAWN) Niels Bohr institute University of Copenhagen Department of Physics and Astronomy Rutgers the State University of New Jersey institute for Cosmic Ray research University of Chinese Academy of Sciences The University of Tokyo ESA/ESTEC Noordwijk 2201 AZ The Netherlands Department of Astronomy School of Physics Huazhong University of Science and Technology INAF-Osservatorio Astrofisico di Torino Sydney institute for Astronomy School of Physics Key Laboratory of Particle Astrophysics The University of Sydney Department of Astronomy Xiamen University institute for Frontiers in Astronomy and Astrophysics Beijing Normal University Department of Astronomy University of Science and Technology Hefei School of Astronomy and Space Sciences University of Science and Technology of China institute of High energy Physics institute of Deep Space Sciences Deep Space Exploration Laboratory Department of Astronomy School of Physics and Astronomy Yunnan University Shanghai Astronomical Observatory Chinese Academy of Science

We report the discovery of a peculiar X-ray transient,EP240408a,by Einstein Probe （EP） and follow-up studies made with EP,Swift,NICER,GROND,ATCA and other ground-based multiwavelength *** new transient was first detected with Wide-field X-ray Telescope （WXT） on board EP on April 8th,2024,manifested in an intense yet brief X-ray flare lasting for *** flare reached a peak flux of 3.9×10-9erg cm-2s-1in 0.5-4 keV,300 times brighter than the underlying X-ray emission detected throughout the *** and more precise follow-up observations by EP/FXT,Swift and NICER confirmed the finding of this new *** X-ray spectrum is non-thermal in 0.5-10 keV,with a power-law photon index varying *** X-ray light curve shows a plateau lasting for4d,followed by a steep decay till becoming undetectable10 d after the initial *** on its temporal property and constraints from previous EP observations,an unusual timescale in the range of 7-23 d is found for EP240408a,which is intermediate between the commonly found fast and long-term *** counterparts have been found in optical and near-infrared,with the earliest observation at 17 h after the initial X-ray detection,suggestive of intrinsically weak emission in these *** demonstrate that the remarkable properties of EP240408a are inconsistent with any of the transient types known so far,by comparison with,in particular,jetted tidal disruption events,gamma-ray bursts,X-ray binaries and fast blue optical *** nature of EP240408a thus remains an *** suggest that EP240408a may represent a new type of transients with intermediate timescales of the order of10 *** detection and follow-ups of more of such objects are essential for revealing their origin.

关键词：

research progresses of nanomaterials as lubricant additives

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Friction 2024年第7期12卷 1347-1391页

作者： Zhengquan JIANG Yankun SUN Bokang LIU Laigui YU Yuping TONG Mingming YAN Zhongzheng YANG Yongxing HAO Linjian SHANGGUAN Shengmao ZHANG weihua LI School of Materials Science and Engineering North China University of Water Resources and Electric PowerZhengzhou 450045China institute of Special Friction and Lubricating Materials North China University of Water Resources and Electric PowerZhengzhou 450045China Nanomaterials Engineering research Center Henan UniversityKaifeng 475001China School of Mechanical Engineering North China University of Water Resources and Electric PowerZhengzhou 450045China

Friction and wear are unavoidable in mechanical *** use of lubricants with nano-additives can effectively reduce friction and wear,which is of great significance to saving energy and protecting the *** present,great progress has been made in the scientific research and industrial application of nano-additives for *** paper mainly introduces the types of nano-additives for lubricants(such as carbon nanomaterials,nano-metals,nano-oxides,sulfides,complexes,polymers,etc.),the tribological properties of lubricants with different components of nano-additives,and the lubrication mechanisms of the nano-additives(including tribofilm formation,rolling ball bearing effect,repairing effect,polishing effect,and synergistic effect).It also deals with the dispersion of nano-additives in lubricants and the influences of their particle size and microstructure on the tribological properties of *** review outlines the performance requirements of nano-additives in different lubrication states,discusses the use of nano-additives in challenging working conditions,and identifies various industrial oil nano-additives with reference to the appropriate options in diverse working ***,the existing problems of nano-additives and their application prospects are *** review,hopefully,would help to shed light on the design and synthesis of novel high-performance nano-additives and promote their application in engineering.

关键词： nanomaterials lubricant additive lubrication mechanism research progress

低温热循环加速非晶合金剪切带在室温的结构弛豫

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Science China Materials 2024年第3期67卷 974-982页

作者：魏玉锋潘杰孙永昊李宁张诚汪卫华柳林 School of Materials Science and Engineering State Key Lab for Materials Processing and Die&Mold TechnologyHuazhong University of Science and TechnologyWuhan 430074China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China institute of Physics Chinese Academy of SciencesBeijing 100190China Songshan Lake Materials Laboratory Dongguan 523808China

低温热循环是实现非晶合金结构回春的一种简单有效方法,但某些非晶合金在低温热循环处理后发生弛豫而不是回春.本研究通过在非晶合金中引入剪切带,在同一块样品上获得了不同区域初始能量不同的非晶合金,系统地研究了不同初始状态对低温... 详细信息

低温热循环是实现非晶合金结构回春的一种简单有效方法,但某些非晶合金在低温热循环处理后发生弛豫而不是回春.本研究通过在非晶合金中引入剪切带,在同一块样品上获得了不同区域初始能量不同的非晶合金,系统地研究了不同初始状态对低温热循环处理效果的影响.研究结果发现,在经过低温热循环处理后,同一试样中的剪切带发生结构弛豫,而基体发生结构回春.类似的双向变化趋势还可以从显微硬度、纳米压痕曲线以及压痕形状的变化上得到验证.经历了100次低温热循环处理后,剪切带和基体的焓和硬度均收敛到一个平衡值.低温热循环能够加速剪切带的结构弛豫,实现了在低温热循环的上限温度上做长时间退火所达不到的状态.文中还采用自由体积模型对实验结果进行分析,阐明了非晶合金的初始状态影响其结构演化方向的机理.本研究为低温热循环处理非晶合金提供了新见解,阐明非晶合金初始状态在其焓变方向上的关键作用.

关键词： metallic glasses cryogenic thermal-cycling rejuvenation relaxation energy state

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A novel algorithm for transmission image reconstruction of tomographic gamma scaners

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Nuclear Science and Techniques 2010年第3期21卷 177-181页

作者： ZHANG Quanhu HUI weihua WANG Dong HE Bin GU Zhongmao LI Ze QIAN Shaojun Xi'an research institute of High-Tech Xi'an 710025 China China institute of Atomic energy Beijing 102413 China

It is difficult to develop image reconstruction algorithms for tomographic gamma scanning based on drummed radioactive residues or *** this paper,a novel reconstruction algorithm of transmission image for tomographic gamma scanning is *** is based on the conventional transmission equation and equivalent gamma-ray track length modified by a Monte Carlo *** algorithm is implemented by simulating the samples on the established *** the verification experiments of the algorithm,several cubic voxel samples were designed and *** tests were *** tomographic gamma scanning of transmission images is compared with the linear attenuation coefficients by the simulated values and experimental data with the algorithm and the reference *** results show that the absolute relative errors of the reconstructed images are less than 5%.

关键词：图像重建算法层析γ扫描传输方程蒙特卡罗方法线性衰减系数模拟平台扫描算法伽玛射线

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