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粉末冶金制备碳纳米管增强铜基复合材料研究进展

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中南大学学报（自然科学版） 2024年第8期55卷 3165-3179页

作者：张运娜贾磊周永欣吕振林近藤勝義西安理工大学材料科学与工程学院陕西西安710048 大阪大学接合科学研究所日本大阪567-0047

碳纳米管具有优异的力学性能和导电、导热性能,作为增强体引入铜基体中有望开发出新一代高强、结构功能一体化的复合材料。然而,碳纳米管在铜基体中的分散性较差及其与铜的润湿性问题,成为制备碳纳米管增强铜基(CNTs/Cu)复合材料的主要... 详细信息

碳纳米管具有优异的力学性能和导电、导热性能,作为增强体引入铜基体中有望开发出新一代高强、结构功能一体化的复合材料。然而,碳纳米管在铜基体中的分散性较差及其与铜的润湿性问题,成为制备碳纳米管增强铜基(CNTs/Cu)复合材料的主要挑战,并显著影响了复合材料的性能。本文对目前有关制备碳纳米管增强铜基复合材料的主要方法包括碳纳米管前期预处理方法、碳纳米管在铜粉末中分散的方法、复合材料的烧结方法进行总结,概述复合材料的力学性能、摩擦磨损性能以及导电导热性能的研究进展,并提出思考和展望,以便为制备CNTs/Cu复合材料研究提供参考。

关键词：碳纳米管铜基复合材料分散性力学性能

Microstructure,Phase Transformation,Precipitation Behavior and Mechanical Properties of P/M Cu40Zn-1.0 wt%Ti Brass Alloy via Spark Plasma Sintering and Hot Extrusion

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Journal of Materials Science & Technology 2013年第11期29卷 1018-1024页

作者： Shufeng Li Hisashi Imai katsuyoshi kondoh Faculty of Materials Science and Engineering Xi'an University of Technology Joining and Welding Research Institute Osaka University

The effect of titanium addition on the microstructure and mechanical properties of brass Cu4OZn has been studied via the powder metallurgy （P/M） route. The water-atomized Cu4OZn-1.0 wt% Ti alloy powder was consolidated at different temperatures in the range of 400-600℃ using spark plasma sintering （SPS） and hot extrusion subsequently. Results show that the super-saturated solid solution titanium element in rapidly cooled brass Cu4OZn powder created high chemical potential for a precipitate reaction, showing significant grain refinement effects on the consolidated Cu4OZn matrix. Consequently, excellent mechanical properties were obtained by precipitation hardening and work hardening after sintering and extrusion, with yield strength of 390 MPa, ultimate tensile strength of 617 MPa, and Vickers micro-hardness of 192 HV, which are 28.7%, 23.4%, and 23.9% higher values than those of extruded Cu4OZn brass, respectively.

关键词： Brass Spark plasma sintering Extrusion Microstructure Mechanical property Precipitation Phase transformation

A thermal activation based constitutive model for the dynamic deformation of AA5083 processed by large-scale equal-channel angular pressing

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Chinese Journal of Aeronautics 2023年第5期36卷 499-507页

作者： Yunfei WANG Minjie WANG Biao CHEN Huijie SUN katsuyoshi kondoh Laszlo JKECSKES Jianghua SHEN School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China School of Materials Science and Engineering Northwestern Polytechnical UniversityXi’an 710072China Joining and Welding Research Institute Osaka University11-1 MihogaokaOsaka 567-0047Japan Hopkins Extreme Materials Institute Johns Hopkins UniversityBaltimore 21218USA Shaanxi Key Laboratory of Impact Dynamic and Its Engineering Application Xi’an 710072China

Aluminum alloy 5083(AA5083)processed by large-scale Equal-channel angular pressing(ECAP)is an excellent engineering material with great prospects for industrial *** accurate assessment of the underlying constitutive relationships with easily determined material constants is critical for the predictive design and informed processing of such structural *** develop such a design framework,uniaxial dynamic compressive tests over a wide range of temperatures(293-573 K)were carried out for an ECAP-processed AA5083 ***,the microstructure before and after dynamic loading was characterized by SEM and *** on the experimental results,a new dynamic constitutive model,based on thermal activation theory,was established to describe the plastic flow behavior of the AA5083 alloy that incorporates the effects of plastic strain,temperature,and strain *** input parameters of the new model were determined using a particle swarm optimization(PSO)*** model predictions show excellent agreement with experimental results,which suggests that the current predictive constitutive model is highly effective in reproducing the dynamic deformation behavior of the large-scale ECAP-processed AA5083.

关键词： Aluminum alloy 5083(AA5083) Constitutive models Dynamic response Equal channel angular pressing(ECAP) Thermal activation

Microstructure evolution and reaction behavior of Cu–Ni alloy and B4C powder system

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Progress in Natural Science:Materials International 2021年第1期31卷 55-62页

作者： Lei Jia Ming-fang Yang Zhen-lin Lu Jin Xu Hui Xie katsuyoshi kondoh School of Materials Science and Engineering Xi'an University of Technology School of Materials Engineering Xi'an Aeronautical University Joining and Welding Research Institute Osaka University

Microstructure evolution and reaction behavior of Cu–Ni alloy and B4C power system was studied by in-situ and static experimental investigations along with theoretical calculations. The reaction process was as follows. Firstly,B4C decomposed into B and C atoms, and then B atoms diffused into Cu–Ni matrix, leading to the formation of Ni2B particles. Subsequently, Ni atoms diffused into B4C, forming a loose mixture of Ni2B and amorphous C at the initial powder boundary. Finally, with the completion of reaction, Ni2B particles at the powder boundary grew into a monolithic block, and then C substance was excluded out and accumulated at the edge of this monolithic Ni2B block. It is believed that the formation of Ni2B phase is caused by the most negative change of Gibbs free energy among all the potential reactions between Ni–B and Ni–B4C systems.

关键词： Metal-matrix composites Reaction behavior Microstructure evolution Cu–Ni/B 4 C composite In-situ experiment

粉末冶金TC4-B_(4)C原位反应制备TiC+TiB增强TC4基复合材料的显微组织和力学性能

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中国有色金属学报 2023年第6期33卷 1769-1783页

作者：李少龙李树丰张鑫潘登刘磊陈彪贾磊 Umeda JUNKO kondoh katsuyoshi 西安理工大学材料科学与工程学院西安711048 西北工业大学材料科学与工程学院西安710072 Joining and Welding Research Institute Osaka UniversityOsaka 5670047Japan

以TC4和B_(4)C粉末为原料,通过放电等离子烧结法(SPS)并结合热挤压制备不同含量TiB和TiC增强TC4基复合材料,研究以TC4-B_(4)C为原位反应体系生成不同含量TiB和TiC对TMCs的微观组织和力学性能的影响规律及其高温力学性能。结果表明:原位... 详细信息

以TC4和B_(4)C粉末为原料,通过放电等离子烧结法(SPS)并结合热挤压制备不同含量TiB和TiC增强TC4基复合材料,研究以TC4-B_(4)C为原位反应体系生成不同含量TiB和TiC对TMCs的微观组织和力学性能的影响规律及其高温力学性能。结果表明:原位生成的TiC和TiB与基体结合牢固,TiC呈类球形颗粒状,TiB呈晶须状;增强相在基体中呈现出沿一次颗粒边界分布的三维网络状形貌;与未增强TC4合金相比较,复合材料基体晶粒显著细化,并存在较高的位错密度,TC4基复合材料的室温和高温性能得到显著提升;在室温拉伸下,当B_(4)C的含量(质量分数)为0.5%时,基体的连通性较好,表现出较高的强度(抗拉强度1246 MPa)和较好的伸长率(12.4%);在400℃下进行拉伸时,当B_(4)C的含量为1.64%时,TC4基复合材料的抗拉强度和伸长率分别为1112 MPa和6.9%。

关键词：钛基复合材料 TiC TiB 三维网状结构力学性能

Microstructure and superelastic properties of free forged Ti-Ni shape-memory alloy

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Transactions of Nonferrous Metals Society of China 2018年第3期28卷 502-514页

作者： Abdollah BAHADOR Esah HAMZAH katsuyoshi kondoh Tuty ASMA ABUBAKAR Farazila YUSOF Junko UMEDA Safaa N.SAUD Mustafa K.IBRAHIM Faculty of Mechanical Engineering Universiti Teknologi Malaysia JWRI Osaka University Department of Mechanical Engineering Faculty of EngineeringUniversity of Malaya Faculty of Information Science and Engineering Management and Science University

Elemental titanium(Ti)and nickel(Ni)powders were consolidated by spark plasma sintering(SPS)to fabricate Ti-51%Ni(mole fraction)shape-memory alloys(SMAs).The objective of this study is to enhance the superelasticity of SPS produced Ti-Ni alloy using free forging as a secondary *** from two processes(with and without free forging)were compared in terms of microstructure,transformation temperature and *** results showed that,free forging effectively improved the tensile and shape-memory *** increased from 6.8%to 9.2%after *** maximum strain during superelasticity increased from 5%to 7.5%and the strain recovery rate increased from 72%to 92%.The microstructure of produced Ti-51%Ni SMA consists of the cubic austenite(B2)matrix,monoclinic martensite(B19′),secondary phases(Ti3Ni4,Ti2Ni and TiNi3)and oxides(Ti4Ni2O and Ti3O5).There was a shift towards higher temperatures in the martensitic transformation of free forged specimen(aged at 500°C)due to the decrease in Ni content of B2 *** is related to the presence of Ti3Ni4 precipitates,which were observed using transmission electron microscope(TEM).In conclusion,free forging could improve superelasticity and mechanical properties of Ti-51%Ni SMA.

关键词： shape-memory alloy superelasticity spark-plasma sintering free forging

Efect of CNTs on Activation Volume and Mobile Dislocation Exhaustion Rate of CNTs/Al under Compression Loading

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Acta Metallurgica Sinica(English Letters) 2023年第1期36卷 127-132页

作者： Minjie Wang Jianghua Shen Biao Chen Umeda Junko katsuyoshi kondoh Yulong Li School of Aeronautics Northwestern Polytechnical UniversityXi’an 710000China Shaanxi Key Laboratory of Impact Dynamic and Its Engineering Application Xi’an 710000China School of Materials Science and Engineering Northwestern Polytechnical UniversityXi’an 710000China Joining and Welding Research Institute Osaka University11-1 MihogaokaOsaka 567-0047Japan School of Civil Aviation Northwestern Polytechnical UniversityXi’an 710000China Joint International Research Laboratory of Impact Dynamics and Its Engineering Applications Xi’an 710000China

In this study,stress relaxation compression tests were performed to investigate the strain rate sensitivity,activation volume and mobile dislocations in carbon nanotubes/aluminum(CNTs/Al)*** results reveal that,with the addition of CNTs,the strain rate sensitivity of CNTs/Al ***,a smaller V*of CNTs/Al compared with pure Al was attributed mainly to the CNT-Al interfaces and partly to the increased forest dislocations cutting activities in grain interior,which was related to the tendency of short ranges order formation during plastic *** incorporation of CNTs also improved the dislocation storage capability and reduced the dislocation velocity,leading to a lower mobile dislocation exhaustion rate.

关键词： Metal matrix composites Carbon nanotubes Strain rate sensitivity Activation volume Dislocations exhaustion

以稻壳为强化原料制备低成本钛合金的摩擦学性能

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稀有金属材料与工程 2020年第10期49卷 3309-3313页

作者：贾磊杨明芳陈江先吕振林近藤勝義谢辉西安理工大学陕西省电工材料与熔渗技术重点实验室陕西西安710048 大阪大学接合科学研究所日本大阪567-0047 西安航空学院陕西西安710077

以稻壳热解产物为SiO2源,通过粉末冶金法制备了Si和O固溶强化的低成本钛合金,并从磨损率、磨损表面形貌和磨屑成分等角度研究了其摩擦学性能和磨损机理。结果表明,随着SiO2加入量的增加,Ti合金的体积磨损率显著降低,与硬度的变化规律吻... 详细信息

以稻壳热解产物为SiO2源,通过粉末冶金法制备了Si和O固溶强化的低成本钛合金,并从磨损率、磨损表面形貌和磨屑成分等角度研究了其摩擦学性能和磨损机理。结果表明,随着SiO2加入量的增加,Ti合金的体积磨损率显著降低,与硬度的变化规律吻合良好,同时磨损表面有三处变化,即犁沟的深度变浅、塑性变形程度降低和磨屑的尺寸变小且数量减少。SiO2的加入使磨损机制从纯Ti的粘着磨损和磨料磨损转变为磨料磨损和氧化磨损,而磨屑尺寸的减小可归因于GCr15球和钛基体反复摩擦,导致磨屑的脆化。本研究提供了一种使用农业废稻壳生产具有优良综合性能的钛合金方法,在降低钛合金成本的同时也有益于生态环境的保护。

关键词：低成本钛合金稻壳分解物SiO2 摩擦学性能磨损机制

过饱和固溶合金元素在粉末冶金石墨黄铜中的析出强化

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材料研究学报 2018年第11期32卷 843-852页

作者：李树丰今井久志近藤胜义张鑫潘登付亚波西安理工大学材料科学与工程学院西安710048 大阪大学接合科学研究所台州大学物理与电子工程学院台州318000

用水雾化制备了含Cr、Fe、Sn、Ti多元过饱和固溶合金元素的Cu40Zn黄铜合金粉末,将其与石墨颗粒预混合后在适当的温度烧结,热挤压后得到棒材。观测挤压棒材中石墨黄铜的微观组织并测量其切削性能和拉伸性能,研究了合金元素和石墨颗粒对... 详细信息

用水雾化制备了含Cr、Fe、Sn、Ti多元过饱和固溶合金元素的Cu40Zn黄铜合金粉末,将其与石墨颗粒预混合后在适当的温度烧结,热挤压后得到棒材。观测挤压棒材中石墨黄铜的微观组织并测量其切削性能和拉伸性能,研究了合金元素和石墨颗粒对切削性能和力学性能的影响。结果表明:黄铜粉末中的过饱和固溶合金元素Cr、Fe、Sn、Ti在后续的热加工过程中以微/纳米尺寸微粒析出,表现出优良的强化效果;合金元素在石墨/黄铜界面的富集和反应促进了石墨/黄铜的界面结合,提高了黄铜的切削性能但是不降低其力学性能。

关键词：有色金属及其合金石墨黄铜粉末冶金无铅力学性能切削性能