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Microstructural characteristics and stability of high-purity silver strips prepared by hot-rolling, cold-rolling, and cryo-rolling

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Journal of materials science: materials in Electronics 2025年第14期36卷 1-13页

作者： Yao, Yingjun Yan, Shuaijiang Wen, Jing Wang, Richu Peng, Xiang Cai, Zhiyong School of Materials Science and Engineering Central South University Changsha410083 China Key Laboratory of Nonferrous Metal Materials Science and Engineering Ministry of Education Central South University Changsha410083 China

Microstructures and hardness of high-purity silver strips prepared by hot-rolling, cold-rolling, cryo-rolling were investigated, along with their stability during annealing at various temperatures. The results indicate that the rolling effectively refines the grains, with mean grain sizes decreasing progressively as the deformation temperature decreases. Transmission electron microscopy (TEM) observations reveal a gradual increase in dislocation density and twin formation with decreasing rolling temperature. The high density of dislocations provides additional driving forces for recrystallization, leading to an increase in recrystallization degree as the rolling temperature decreases. The hardness of the strips decreases gradually with increasing annealing temperature. Notably, the hardness of the cryo-rolled strip remains consistently higher than that of the cold-rolled and hot-rolled strips. At 25 °C annealing, a high density of dislocations persists in the strips. As the annealing temperature increases, the dislocation density gradually diminishes, while the mean grain size increases. Dislocations are scarcely observable after annealing at 250 °C, indicating significant recrystallization in the strips. © The Author(s), under exclusive licence to Springer science+Business Media, LLC, part of Springer Nature 2025.

关键词： Recrystallization (metallurgy)

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Co-based MoF derived metal catalysts: from nano-level to atom-level

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Tungsten 2023年第2期5卷 201-216页

作者： Yuan-Xin Du Yan-Ting Zhou Man-Zhou Zhu College of Materials Science and Engineering and Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials Department of Chemistry and Center for Atomic Engineering of Advanced MaterialsKey Laboratory of Structure and Functional Regulation of Hybrid Materials of the Ministry of EducationAnhui UniversityHefei 230601China

Co-based metal-organic framework(MOF),a kind of porous crystal material composed of Co ions and organic linkers,is a common type of *** not only has the intrinsic properties of MOF,such as structural diversity,functional adjustability,and high surface area,but more importantly,it contains Co metal species,which are considered by many reports to be active catalytic centers for many ***,metal catalysts always received wide and sustained *** combi-nation of the two types of catalysts can enhance the catalytic performance and achieve the"1+1>2"*** this review,we mainly overview the synthesis methods of Co-based MOF-derived metal catalysts from nano-to atom-level and their applications in the catalysis field in recent years and put forward our own views and prospects for this research direction.

关键词： Metal-organic framework Cobalt Catalysis Nanoparticle Nanocluster Single-atom catalyst

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Enhancing corrosion resistance of Mg-Al-Mn-Ca-Y dilute alloy via novel core-shell structured Al_(8)Mn_(4)Y-Al_(2)Ca and controllable solute segregation

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Journal of Magnesium and Alloys 2025年第1期13卷 172-192页

作者： Xiaorui Dong Min Zha Dawei Wang Siqing Wang Yajie Yang Hailong Jia State Key Laboratory of Superhard Materials Jilin UniversityChangchun 130012China Key Laboratory of Automobile Materials of Ministry of Education&School of Materials Science and Engineering Nanling CampusJilin UniversityNo.5988 Renmin StreetChangchun 130025China International Center of Future Science Jilin UniversityChangchun 130012China

A novel core-shell structured Al_(8)Mn_(4)Y-Al_(2)Ca phase and controllable solute-segregation are elaborately designed in dilute Mg-0.6Al-0.5Mn-0.1Ca-0.1Y alloy(wt.%),via incomplete peritectic transformation during twin-roll *** soaked in 3.5 wt.%NaCl solution,Al_(2)Ca shell with a low electrochemical potential prevents direct contact of noble Al_(8)Mn_(4)Y with Mg matrix,mitigating the micro-galvanic corrosion and meanwhile accelerating the formation of uniform corrosion ***,solute(Al,Ca)-segregation motivates the formation of heterogeneous multilayered corrosion product films,enhancing corrosion resistance and even achieving self-healing upon long-term ***,the dilute Mg alloy exhibits a corrosion rate as low as 0.22±0.05 mm·y^(−1).

关键词： Mg-Al-Mn-based alloys Core-shell structure Solute segregation Corrosion behavior Protective film

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COF-derived Co nanoparticles@N-doped carbon electrocatalysts for high performance Zn-air batteries

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Chinese Journal of Chemical engineering 2023年第11期63卷 43-50页

作者： Jie Wei Chengcai Zhao Ming Chen Fengying Liu Limin Zhao Hui Zhao Zhong-Yong Yuan School of Materials Science and Engineering Liaocheng UniversityLiaocheng 252000China College of Chemistry and Chemical Engineering Xinyang Normal UniversityXinyang 464000China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) School of Materials Science and EngineeringNankai UniversityTianjin 300350China

Precise modulation of the structure and composition of electrocatalysts is critical for promoting the kinetically sluggish process of oxygen reduction reaction(ORR)and oxygen evolution reaction(OER).Covalent organic frameworks(COF)offer a novel way to create highly efficient electrocatalysts due to their tunable composition,structure and surface ***,we report a high-efficiency bifunctional electrocatalyst comprising Co nanoparticles embedded within N-doped carbons(Co@NCs)for Zn-air batteries(ZABs).The Co@NC is yielded via the coordination of a triazine COF with Co-containing precursors and subsequent calcination under inert *** as-prepared Co@NC exhibits remarkable ORR/OER performance and great potential in rechargeable *** liquid ZAB constructed with Co@NC provides both high specific capacity and power ***,the ZAB exhibits a voltage gap of 0.8 V during discharge and charge cycles and high stability for 220 h compared to the Pt/C-assembled *** strategy for regulating electrocatalytic activities of COF-derived carbon materials could be expanded for creating various carbon catalysts.

关键词： COF Co@NC Composites Electrochemistry Catalysis Zn-air battery

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Influences of substituting of(Ni_(1/3)Nb(2/3))for Ti^(4+)on the phase compositions,microstructures,and dielectric properties of Li_(2)Zn[Ti_(1-x)(Ni_(1/3)Nb_(2/3))_(x)]_(3)O_(8)(0<≤x≤0.3)microwave ceramics

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Journal of advanced Ceramics 2023年第4期12卷 760-777页

作者： Jiamao Li Zexing Wang Yunfeng Guo Songlin Rana School of Materials Science and Engineering Anhui University of TechnologyMaanshan 243032China Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials Ministry of EducationAnhui University of TechnologyMaanshan 243002China

Complex ion substitution is gaining more attention as an appealing method of modifying the structure and performance of microwave *** this work,Li_(2)Zn[Ti_(1-x)(Ni_(1/3)Nb_(2/3))_(x)]_(3)O_(8),0≤x≤0.3ceramics were designed based on the complex ion substitution strategy,following the substitution rule of radius and valence to investigate the relationship among phase compositions(containing oxygen vacancies and Ti^(3+)ions),microstructures,and microwave dielectric characteristics of the LZTNNx *** samples maintained a single Li_(2)ZnTi_(3)O_(8)solid solution phase as x≤0.2,whereas the sample of x=0.3 produced a second phase with the LiNbO_(3)*** appropriate amount of(Ni_(1/3)Nb_(2/3))^(4+)substitution could slightly improve the densification of the LZTNNx ceramics due to the formation of the LiZnTi_(3)O_(8)solid solution accompanied by a decrease in the average grain *** presence of a new Aig Raman active band at about 848 cm^(-1)indicated that local symmetry changed,affecting atomic interactions of the LZTNNx *** variation of the relative dielectric constant(εr)was closely related to the molar volume ionic polarizability(α_(D)^(T)),and the temperature coefficient of the resonant frequency(τ_(f))was related to the bond valence(V_(1))of *** increase in density,the absence of the Ti3+ions and oxygen vacancies,and the reduction in damping behavior were responsible for the decreased dielectric *** LZTNNO.2 ceramics sintered at 1120℃exhibited favorable microwave dielectric properties:εr=22.13,quality factor(Q×f)=97,350 GHz,andτ_(f)=-18.60 ppm/C,which might be a promising candidate for wireless communication applications in highly selective electronics.

关键词： Li_(2)ZnTi_(3)O_(8)ceramics microwave dielectric properties microstructure Raman spectroscopy X-ray photoclcctron spectroscopy(XPS)

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Plasma-assisted fabrication of multiscale materials for electrochemical energy conversion and storage

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Carbon Energy 2025年第2期7卷 144-171页

作者： Chen Li Tengfei Zhang Zhong Qiu Beirong Ye Xinqi Liang Xin Liu Minghua Chen Xinhui Xia Chen Wang Wangjun Wan Yongqi Zhang Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengduChina Key Laboratory of Engineering Dielectric and Applications(Ministry of Education) School of Electrical and Electronic EngineeringHarbin University of Science and TechnologyHarbinChina State Key Laboratory of New Textile Materials and Advanced Processing Technology Wuhan Textile UniversityWuhanChina College of Materials Science and Engineering Zhejiang University of TechnologyHangzhouChina School of Materials Science and Engineering Zhejiang UniversityHangzhouChina Zhejiang Academy of Science and Technology for Inspection and Quarantine HangzhouChina

Plasma,the fourth state of matter,is characterized by the presence of charged particles,including ions and *** has been shown to induce unique physical and chemical ***,there have been increased applications of plasma technology in the field of multiscale functional materials'preparation,with a number of interesting *** review will begin by introducing the basic knowledge of plasma,including the definition,typical parameters,and classification of plasma *** this,we will provide a comprehensive review and summary of the applications(phase conversion,doping,deposition,etching,exfoliation,and surface treatment)of plasma in common energy conversion and storage systems,such as electrocatalytic conversion of small molecules,batteries,fuel cells,and *** article summarizes the structure-performance relationships of electrochemical energy conversion and storage materials(ECSMs)that have been prepared or modified by *** also provides an overview of the challenges and perspectives of plasma technology,which could lead to a new approach for designing and modifying electrode materials in ECSMs.

关键词： electrocatalysts energy conversion and storage nanomaterials plasma

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Mn/S diatomic sites in C_(3)N_(4) to enhance O_(2) activation for photocatalytic elimination of emerging pollutants

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Journal of Environmental sciences 2025年第3期149卷 512-523页

作者： Chengji Sui Zixuan Nie Xiaobin Xie Yifeng Wang Lingshuai Kong Shou-Qing Ni Jinhua Zhan Key Laboratory for Colloid&Interface Chemistry of Education Ministry School of Chemistry and Chemical EngineeringShandong UniversityJinan 250100China Institute of Eco-Environmental Forensics School of Environmental Science and EngineeringShandong UniversityQingdao 266237China

Oxygen activation leading to the generation of reactive oxygen species(ROS)is essential for photocatalytic environmental *** limited efficiency of O_(2)adsorption and reductive activation significantly limits the production of ROS when employing C_(3)N_(4)for the degradation of emerging *** with metal single atoms may lead to unsatisfactory efficiency,due to the recombination of photogenerated electron-hole ***,Mn and S single atoms were introduced into C_(3)N_(4),resulting in the excellent photocatalytic ***/S-C_(3)N_(4)achieved 100%removal of bisphenol A,with a rate constant 11 times that of pristine C_(3)N_(4).According to the experimental results and theoretical simulations,Satoms restrict holes,facilitating the photo-generated carriers’***-atom Mn acts as the O_(2)adsorption site,enhancing the adsorption and activation of O_(2),resulting the generation of *** study presents a novel approach for developing highly effective photocatalysts that follows a new mechanism to eliminate organic pollutants from water.

关键词： Photocatalytic degradation O_(2)activation Reactive oxygen species Emerging pollutants Single-atom catalyst

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Formation and solute segregation for an asymmetric tilt boundary on{1012}twin boundaries

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Journal of Magnesium and Alloys 2025年第2期13卷 583-591页

作者： Qiang Yang Shuhui Lv Peng Chen Zefeng Xie Shuo Zhou Xin Qiu State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022PR China School of Materials Science and Engineering Changchun University of Science and Technology130022PR China Key Laboratory of Automobile Materials of Ministry of Education&School of Materials Science and Engineering Jilin UniversityChangchun130025PR China

Asymmetric tilt boundaries on conventional twin boundaries(TBs)are significant for understanding the role of twins on coordinating plastic deformation in many metallic ***,the formation modes of many asymmetric tilt boundaries are hard to be accounted for based on traditional theoretical models,and the corresponding solute segregation is ***,atomic structures of a specific asymmetric boundary on{1012}TBs were reveled using aberration-corrected high-angle annular dark-field scanning transmission electron microscopy(HAADF-STEM),molecular dynamics(MD)and density functional theory(DFT)*** betweenM dislocations and the{1012}TB can generate a~61°/25°asymmetric tilt *** segregation of Gd and Zn atoms is closely related to the aggregateddislocations and the interfacial interstices of the asymmetric tilt boundary,which is energetically favorable in reducing the total system energy.

关键词： Magnesium alloy Transmission electron microscopy Twin boundary Dislocation Segregation

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The strength-ductility synergy of magnesium matrix nanocomposite achieved by a dual-heterostructure

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材料科学技术（英文版） 2025年第12期215卷 296-314页

作者： Lingling Fan Yukai Xiong Ying Zeng Ran Ni Yuwenxi Zhang Lingbao Ren Hajo Dieringa Yuanding Huang Gaofeng Quan Xu Zhang School of Mechanical Engineering Chengdu UniversityChengdu 610106China Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Material Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China School of Mechanics and Aerospace Engineering Southwest Jiaotong UniversityChengdu 610031China Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Material Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Center for Advancing Materials Performance from the Nanoscale State Key Laboratory for Mechanical Behavior of MaterialsXi'an Jiaotong UniversityXi'an 710049China Institute of Material and Process Design Helmholtz-Zentrum HereonGeesthacht 21502Germany Institute of Metallic Biomaterials Helmholtz-Zentrum HereonGeesthacht 21502Germany

This study aims to achieve a synergy of strength and ductility in magnesium-based nanocomposite ma-terials through the design of a *** ball milling and hot extrusion,a nano-TiC/AZ61 composite featuring particle-rare coarse grain(CG)and particle-rich fine grain(FG)zones was successfully *** results demonstrated that compared with the homogeneous struc-ture,the dual-heterostructure composite achieved a significant increase in elongation by 116％and a remarkable 165％improvement in the strength-ductility product(SDP),while maintaining a high ulti-mate tensile strength(UTS)of 417±4 *** substantial performance enhancement is primarily at-tributed to the additional strain hardening induced by hetero-deformation-induced(HDI)strain harden-ing and crack-blunting capabilities,as elucidated by microstructural characterization and crystal plasticity finite element modeling(CPFEM).Notably,the strain hardening contribution from the CG zones at the early stage of deformation(≤ 45％of total plastic deformation amount)is minimal but increases sig-nificantly during the subsequent deformation *** dislocation increment rate in CG zones(219％)is observed to be more than double that in FG zones(95％),attributed to the large grain size and low dislocation density in CG zones,which provide more space for dislocation *** addition,the aggravated deformation inhomogeneity as deformation progresses leads to an increase in geometrically necessary dislocations(GNDs)generation near the heterogeneous interface,thereby enhancing HDI *** mechanism analysis indicated that the cracks mainly initiate in the FG region and are effectively blunted upon their propagation to the CG region,necessitating increased energy consumption and indicating higher fracture toughness for the dual-heterostructure *** study validates the effectiveness of the dual-heterostructure design in magnesium-based composites,providing a novel u

关键词： Heterostructure Strengthening mechanism Strength-ductility synergy Fracture mechanism Magnesium

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Recent progress and challenges in interdigital microbatteries:Fabrication, functionalization and integration

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Journal of Energy Chemistry 2023年第3期78卷 294-314,I0009页

作者： Li Song Xuting Jin Chunlong Dai Yuyang Han Jiatao Zhang Yang Zhao Zhipan Zhang Liangti Qu Key Laboratory of Cluster Science Ministry of Education of ChinaKey Laboratory of Photoelectronic/Electrophotonic Conversion MaterialsSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education School of Chemical EngineeringZhengzhou UniversityZhengzhou 450001Henan China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education Department of ChemistryTsinghua UniversityBeijing 100084China

Currently,the increasing demands for portable,implantable,and wearable electronics have triggered the interest in miniaturized energy storage *** from conventional energy storage devices,interdigital microbatteries(IMBs) are free of separators and prepared on a single substrate,potentially achieving a short ionic diffusion path and better ***,they can be easily fabricated and integrated into on-chip miniaturized electronics,holding the promise to provide long-lasting power for advanced microelectronic *** date,while many seminal works have been reviewed the topic of microbatteries,there is no work that systematically summarizes the development of IMBs of high energy density and stable voltage platforms from fabrication,functionalization to *** current review focuses on the most recent progress in IMBs,discussing advanced micromachining techniques with compatible features to construct high-performance IMBs with smart functions and intelligent integrated *** future opportunities and challenges of IMBs are also highlighted,calling for more efforts in this dynamic and fast-growing research field.

关键词： Interdigital microbatteries Fabrication Functionalization

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