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Design of low-alloying and high-performance solid solution-strengthened copper alloys with element substitution for sustainable development

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International Journal of Minerals,Metallurgy and materials 2024年第5期31卷 826-832页

作者： Jiaqiang Li Hongtao Zhang Jingtai Sun Huadong Fu Jianxin Xie Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China Key Laboratory for Advanced Materials Processing(MOE) University of Science and Technology BeijingBeijing 100083China Beijing Laboratory of Metallic Materials and Processing for Modern Transportation University of Science and Technology BeijingBeijing 100083China Liaoning Academy of Materials Shenyang 110004China

Solid solution-strengthened copper alloys have the advantages of a simple composition and manufacturing process,high mechanical and electrical comprehensive performances,and low cost;thus,they are widely used in high-speed rail contact wires,electronic component connectors,and other *** the contradiction between low alloying and high performance is an important challenge in the development of solid solution-strengthened copper *** the typical solid solution-strengthened alloy Cu-4Zn-1Sn as the research object,we proposed using the element In to replace Zn and Sn to achieve low alloying in this *** new alloys,Cu-1.5Zn-1Sn-0.4In and Cu-1.5Zn-0.9Sn-0.6In,were designed and *** total weight percentage content of alloying elements decreased by 43%and 41%,respectively,while the product of ultimate tensile strength(UTS)and electrical conductivity(EC)of the annealed state increased by 14%and 15%.After cold rolling with a 90%reduction,the UTS of the two new alloys reached 576 and 627MPa,respectively,the EC was 44.9%IACS and 42.0%IACS,and the product of UTS and EC(UTS×EC)was 97%and 99%higher than that of the annealed state *** dislocations proliferated greatly in cold-rolled alloys,and the strengthening effects of dislocations reached 332 and 356 MPa,respectively,which is the main reason for the considerable improvement in mechanical properties.

关键词： element substitution copper alloy solid solution strengthening microstructure and performance

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In-situ observation and analysis of high temperature behavior of carbides in GCr15 bearing steel by confocal laser scanning microscopy

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Journal of Iron and Steel Research International 2025年第2期32卷 409-417页

作者： Jun Ren Yue Teng Xiang Liu Xi Xu Hui-gai Li Ke Han Qi-jie Zhai State Key Laboratory of Advanced Special Steel and Shanghai Key Laboratory of Advanced Ferrometallurgy and School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Center for Advanced Solidification Technology(CAST) School of Materials Science and EngineeringShanghai UniversityShanghai 200444China Ansteel Group Iron and Steel Research Institute Anshan 114000LiaoningChina National High Magnetic Field Laboratory Florida State UniversityTallahasseeFL 32310USA

The high-temperature dissolution behavior of primary carbides in samples taken from GCr15 continuous-casting bloom was observed in-situ by confocal laser scanning *** were fitted to the dissolution kinetics of primary carbides during either heating or *** of carbides proceeded in three stages(fast→slow→faster)as either temperature or holding time was *** the heating process and during the first and third stages of the soaking process,the original size of the carbides determined the steepness of the slope,but during the middle(“slow”)stage of the soaking process,the slope remained *** initial size of the carbides varied greatly,but their final dissolution temperature fell within the narrow range of 1210-1235℃,and the holding time remained within 50 *** analysis was used to study the morphological characteristics of small and medium-sized carbides during the dissolution *** to changes in the fractal dimension before and after soaking,the carbides tended to evolve towards a more regular morphology.

关键词： Bearing steel High-temperature confocal laser scanning microscope In-situ observation Primary carbide Fractal analysis

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Environment-friendly Emulsion Copolymerization of Chlorotrifluoroethylene and Vinyl Ethers

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Chinese Journal of Polymer science 2025年第5期43卷 738-744页

作者： Shu-Yu Liu Shu-Wen Peng Li-Jun Du Shu-Guang Yang State Key Laboratory of Advanced Fiber Materials Center for Advanced Low-Dimension MaterialsCollege of Material Science and EngineeringDonghua UniversityShanghai201620China Shanghai Huayi 3F New Materials Co. Ltd.Shanghai200025China

Copolymers of fluoroethylene and vinyl ethers(FEVE)are soluble and curable at relatively low temperature,and are used as high-performance coatings and ***,most market-available FEVE products obtained through solution polymerization contain a large fraction of organic solvent,and hence,volatile organic compound(VOC)emissions cause environmental *** this study,the emulsion copolymerization of chlorotrifluoroethylene(CTFE)and vinyl ethers using an environmentally friendly emulsification system to produce waterborne FEVE was *** addition to mixed nonionic and ionic surfactants,macromolecular monomer with double bond and polyoxyethylene segments were used in the emulsification *** effect of adding macromolecular monomer and polyoxyethylene segment length of the nonionic surfactant on emulsion copolymerization were *** optimized emulsifier system for FEVE is proposed,and the prepared FEVE latexes exhibit excellent storage stability and film formation ability.

关键词： Fluorocarbon polymer FEVE Emulsion polymerization Coating

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Multifunctional 3D electrodes for tunable high-performance hybrid zinc batteries

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Journal of materials science & Technology 2024年第11期178卷 155-161页

作者： Yiming Chen Minxuan Zhou Junpeng Wu Xidan Xiao Lin Xu School of Chemistry and Materials Science Hubei Engineering UniversityXiaogan 432000China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

The high energy density and long cycling life of zinc-based batteries are restricted by the single electro-chemical reaction *** improve the electrochemical performance of batteries,electrode materials,electrolytes and membranes are regularly modified,while the construction of battery systems is often ***,a multifunctional electrode was prepared via 3D printing,which successfully coupled the metal oxide/hydroxide-zinc battery(MZB)reaction and rechargeable zinc-air battery(RZAB)*** ultrathick hierarchical 3D electrode provided a tunable capacity for the MZB system,which enabled the possibility for feasible output regulation of this hybrid *** active material NiCoLDH was discov-ered to undergo structure reconstruction during cycling,which revealed the capacity fading *** delicate system design and discovery ensured a high-performance battery configuration and revealed the corresponding mechanism,opening a new avenue for developing high-performance zinc batteries.

关键词： Zinc battery Multifunctional electrode 3D printing Hierarchical 3D structure

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Emulsion Binders with Multiple Crosslinked Structures for High-Performance Lithium-Sulfur Batteries

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Chinese Journal of Polymer science 2023年第7期41卷 1027-1036页

作者： Ya-Fang Tan Wen-Qiang Wang Ling Gao Ai-Guo Guan Geng-Chao Wang Shanghai Key Laboratory of Advanced Polymeric Materials Shanghai Engineering Research Center of Hierarchical NanomaterialsSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China

Lithium-sulfur batteries suffer a lot from the huge volume change and the shuttle effect. However, conventional poly(vinylidene fluoride) binder has intrinsic drawbacks, such as low ion conductivity, weak polysulfide-trapping ability, poor mechanical properties, and requirement of organic solvents. Herein, we designed a functional emulsion binder with multi crosslinked structure. Such a structure was formed by the covalent crosslinking within and between the emulsion particles, which facilitates the adapting of the volume expansion of sulfur cathode, thereby ensuring the integrity of electrodes. Besides, the polar functional groups endow the binder with strong chemisorption of lithium polysulfide and fast lithium-ion migration ability. Thus, the assembled lithium-sulfur battery displayed a high initial discharge capacity of 1246 mAh·g^(−1) at 0.1 C, and a capacity fading rate of 0.04% per cycle after 500 cycles at 0.5 C. Even at a high sulfur mass loading of 4.8 mg·cm^(−2), a high capacity of 956 mAh·g^(−1) was still obtained at 0.2 C.

关键词： Acrylate copolymer Internal and external crosslinking Emulsion binders Lithium-sulfur batteries

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Ultrafine-grained LaB_(6)–ZrB_(2) composite ceramics with superior mechanical and thermionic emission properties prepared by highpressure sintering

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Journal of advanced Ceramics 2024年第12期13卷 2021-2029页

作者： Xiaogang Guo An Liu Lingjuan Hao Hang Zhou Shuai Chen Pan Ying Bing Liu Baozhong Li Yufei Gao Zhisheng Zhao Ling Kong Mengdong Ma Xinyu Yang Dongli Yu Center for High Pressure Science(CHiPS) State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004China State Key Laboratory of Crane Technology Yanshan UniversityQinhuangdao 066004China Handan key Laboratory of Intelligent Awareness and Application Handan UniversityHandan 056001China National Key Laboratory of Advanced Casting Technologies MIIT Key Laboratory of Advanced Metallic and Intermetallic Materials TechnologyEngineering Research Center of Materials Behavior and DesignMinistry of EducationNanjing University of Science and TechnologyNanjing 210094China School of Mechanical Engineering Yanshan UniversityQinhuangdao 066004China School of Materials Science and Engineering Hefei University of TechnologyHefei 230009China

In this study,ultrafine-grained LaB_(6)–ZrB_(2)composite ceramics were successfully synthesized by sintering a mixture of self-produced LaB_(6)nanopowder and commercial ZrB_(2)nanopowder under high *** with their coarse-grained counterparts,ultrafine-grained ceramics exhibit improved mechanical ***,the ultrafinegrained LaB_(6)–ZrB_(2)composite ceramic sintered at 4 GPa and 1673 K,with an average grain size of 286 nm,shows optimal mechanical performance characterized by a Vickers hardness of 25.6 GPa,a fracture toughness of 4.1 MPa·m^(1/2),and an elastic modulus of 338 ***,the ultrafine-grained LaB_(6)–ZrB_(2)composite ceramics displayed strong thermal emission,reaching a maximum current density of 27.5 A∙cm^(−2)at 1773 *** structural and functional advantages of ultrafine-grained LaB_(6)–ZrB_(2)composite ceramics render them suitable for potential use in thermionic emission cathodes.

关键词： LaB_(6)-ZrB_(2) ultrafine-grained high pressure mechanical properties thermal field emission

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Lamellar-assembled PdNi super-nanosheets as effective oxygen redox dual-electrocatalysts for rechargeable Zn-air batteries

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Nano Research 2023年第2期16卷 2163-2169页

作者： Luhong Fu Kai Liu Chao Zhen Yuxin Zhu Zixi Lyu Guifen Du Shuifen Xie Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing Instrumental Analysis CenterCollege of Materials Science and EngineeringHuaqiao UniversityXiamen 361021China

Exploration of bifunctional electrocatalysts toward effective oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)is pivotal for developing high-efficiency and rechargeable metal-air batteries but remains great *** we elaborately synthesize lamellar-assembled PdNi super-nanosheets(SNSs)with an optimized Pd/Ni molar ratio to serve as attractive ORR and OER bifunctional electrocatalysts for rechargeable high-powered Zn-air batteries(ZABs).The products are layer-by-layer stackings of ultrathin PdNi nanosheet *** the drastically extended two-dimensional(2D)surface,the inserted Ni atoms can substantially lower down the d-band center of surface Pd toward improved ORR kinetics and concurrently create oxytropic NiOx sites to adsorb–OH groups for promoting the reverse OER ***,the ORR mass activity and specific activity of the primary Pd_(92)Ni_(8)SNSs attain 2.5 A·mg^(−1)and 3.15 mA·cm^(−2),which are respectively 14 and 9 times those of commercial Pt/***,the OER activity and stability of Pd_(92)Ni_(8)SNSs/C distinctly outperform those of the RuO_(2)benchmark,suggesting excellent reversible oxygen *** power density of the ZAB with Pd_(92)Ni_(8)SNSs/C as the air cathode is 2.7 times higher than that by Pt/C ***,it can last for over 150 h without significant performance degradation during the charge–discharge cycle *** work showcases a feasible strategy for developing self-assembled multimetallic 2D nanomaterials with excellent bifunctional catalytic performances toward energy conversion applications.

关键词： Pd-based nanomaterials oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)bifunctional

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Molecular Dynamics Study on the Interactions of 1/2Edge Dislocations with Voids and Ni_(3)Al Precipitates in FCC Ni

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Acta Mechanica Solida Sinica 2025年第1期38卷 1-13页

作者： Wendong Cui Junfeng Nie Pandong Lin Lei He Institute of Nuclear and New Energy Technology Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of EducationTsinghua UniversityBeijing100084China Ministry of Education Key Laboratory for Liquid-Solid Structural Evolution and Processing of MaterialsSchool of Materials Science and EngineeringShandong UniversityJinan250061China

Nickel-based alloys are the primary structural materials in steam generators of high-temperature gas *** understand the irradiation effect of nickel-based alloys,it is necessary to examine dislocation movement and its interaction with irradiation defects at the *** due to voids and Ni_(3)Al precipitates may significantly impact irradiation damage in nickel-based *** paper employs the molecular dynamics method to analyze the interaction between edge dislocations and irradiation defects(void and Ni_(3)Al precipitates)in face-centered cubic *** effects of temperature and defect size on the interaction are also *** results show that the interaction process of the edge dislocation and irradiation defects can be divided into four stages:dislocation free slip,dislocation attracted,dislocation pinned,and dislocation *** modes include the formation of stair-rod dislocations and the climbing of extended dislocation bundles for voids,as well as the generation of stair-rod dislocation and dislocation shear for ***,the interactions of edge dislocations with voids and Ni_(3)Al precipitates are strongly influenced by temperature and defect size.

关键词： Void Ni_(3)Al precipitate Nickel Edge dislocation Molecular dynamics

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Carbon nanomaterials for aqueous zinc-ion capacitors:recent progress,challenges,and perspectives

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Rare Metals 2024年第12期43卷 6255-6287页

作者： Qing Wang Wei-Qing Yang Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu610031China Research Institute of Frontier Science Southwest Jiaotong UniversityChengdu610031China

Zinc-ion hybrid capacitors(ZHCs),integrating the high power density of supercapacitors and high energy density of batteries,are an emerging and sustainable electrochemical energy storage ***,the poor rate performance,low utilization of active sites and unsatisfactory cycling life of capacitive-type cathode are still current technical challenges,while the uneven deposition of zinc anode generates a large number of dendrites,which can easily penetrate the separator to cause device failure,greatly limiting the commercialization prospects of ***,this review systematically elaborates on the current research progress of cathode materials for ZHCs,including preparation methods and structural design of porous carbon and heteroatom-doped porous carbon,deeply analyzing and discussing the energy storage mechanism and electrochemical ***,this review analyzes the causes and inhibition mechanisms of zinc dendrites,including electrolyte modification,induced uniform deposition of zinc and zinc anode modification,systematically elaborating on the three directions of current modification strategies for zinc ***,the current challenges and future development of cathode materials and dendrite suppression were prospected,developing a high-performance ZHCs.

关键词： Zinc-ion hybrid capacitors Capacitive-type cathode Porous carbon Energy storage mechanism Dendrite suppression

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Synergistic ionic modification strategy enhances the stability of naphthalene diimide zwitterions for cost-effective aqueous organic redox flow batteries

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National science Review 2025年第5期12卷 347-361页

作者： Heng Zhang Chenjing Liu Zengrong Wang Xu Liu Zhikang Han Xuri Zhang Yawen Li Qing Zhao Gang He Frontier Institute of Science and Technology Interdisciplinary Research Center of Frontier Science and Technology State Key Laboratory for Strength and Vibration of Mechanical Structures Xi'an Jiaotong University Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai University Shaanxi Key Laboratory of New Conceptual Sensors and Molecular Materials Engineering Research Center of Key Materials for Efficient Utilization of Clean Energy of Shaanxi Province Xi'an Key Laboratory of Electronic Devices and Material ChemistryXi'an Jiaotong University

Aqueous organic redox flow batteries（AORFBs） hold significant promise for energy storage due to their unique advantages and ***,their development is hindered by the lack of decomposition resistance and cycle stability over long *** this study,we synthesized naphthalene diimide（NDI） derivatives with zwitterions in their side chains via the atmospheric pressure method,namely（CBu）2NDI and（SPr）*** electrostatic repulsion between（CBu）2NDI precis ely regulatesπ-π stacking into a parallel-staggered *** synergistic zwitterions strategy effectively mitigates the positive charge of N+in（CBu）2NDI compared with（NPr）2NDI and dex-NDI;this not only enhances the aromaticity of the naphthalene diimide core but also inhibits the side chain decomposition caused by the SN2 nucleophilic attack of hydroxyl ions（OH-） on the C=*** calculation of the single point energy proves that during the charging processes of（CBu）2ND I,the K+will be close to the naphthalene core to form dimers or monomers with lower energy configurations under electrostatic attraction.（CBu）2NDI achieved a water solubility up to 1.49 M,which can be paired with K4Fe（CN）6under two-electron transfer with total electrolyte costs as low as $6.58 *** 0.1 M battery maintains full capacity after 5070 ***,the battery delivers an impressive 100% capacity retention under 2 M e-during 220 cycles.

关键词： naphthalene diimide derivatives synergistic effect of zwitterions π-π interaction stable configuration decomposition resistance

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