摘要
通过机械合金化和放电等离子烧结制备Cu-Y_(2)O_(3)和Cu-Y_(2)O_(3)-Zr复合材料,并采用光学显微镜、扫描电镜、透射电镜、电导率和拉伸实验对其组织和性能进行系统研究。研究发现,复合材料的显微组织对其力学性能和电导率具有很大影响。电学性能的改善可归因于共格Y4Zr_(3)O_(12)粒子的形成和Cu_(4)Zr相的优先成核,它们分别改善了Y_(2)O_(3)和Cu基体之间的界面以及降低了位错密度。此外,Cu-Y_(2)O_(3)-Zr复合材料的屈服强度为265.6MPa,极限抗拉强度为301.0MPa,伸长率为23.6%,电导率达到92.0%(IACS)。
Cu-Y_(2)O_(3) and Cu-Y_(2)O_(3)-Zr composites were prepared via mechanical alloying and spark plasma sintering,and their microstructure and properties were systematically studied by using optical metalloscope,scanning electron microscope,transmission electron microscope,conductivity and tensile tests.It is found that the microstructure of the composites greatly affects mechanical behavior and electrical conductivity.The improvement of electrical property can be attributed to the formation of coherent Y4Zr_(3)O_(12) particles and the preferential nucleation of Cu_(4)Zr phase,which improves the interface between Y_(2)O_(3) and Cu matrix,and reduces the dislocation density,respectively.In addition,the Cu-Y_(2)O_(3)-Zr composites can achieve 265.6 MPa of yield strength,301.0 MPa of ultimate tensile strength,23.6%of elongation,and 92.0%(IACS)of electrical conductivity.
作者
秦永强
庄翌
罗来马
张一帆
吴玉程
Yong-qiang QIN;Yi ZHUANG;Lai-ma LUO;Yi-fan ZHANG;Yu-cheng WU(School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China;National-Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology,Hefei 230009,China;Engineering Research Center of High Performance Copper Alloy Materials and Processing,Ministry of Education,Hefei 230009,China)
基金
supported by the National Key Research and Development Program of China(No.2019YFE03120002)
the Natural Science Foundation of Anhui Province,China(Nos.2108085J21,S202202a04021990)
the National Key Research and Development Program of Anhui Province,China(No.202103a05020002)
the Higher Education Discipline Innovation Project(No.B18018).
