Effect of nano-Y2O3 on microstructure and mechanical properties of W-Ni-Cu alloys

被引:15
作者
Li, Wensheng [1 ]
Dong, Hongfeng [1 ,2 ]
机构
[1] Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China
[2] Shaanxi Univ Technol, Sch Mat Sci & Engn, Hanzhong 723001, Peoples R China
基金
中国国家自然科学基金;
关键词
W-Ni-Cu alloy; nano-Y2O3; microstructure; mechanical properties; TUNGSTEN HEAVY ALLOY; DISPERSION; BEHAVIOR;
D O I
10.1088/2053-1591/aad996
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The mechanical properties and microstructures of the W-Ni-Cu-Y2O3 alloys with different Y2O3 contents through cold pressing/sintering were investigated. The results demonstrated that the W-Ni-Cu-Y2O3 alloys mainly included the W, (Ni, Cu) and Y2O3 phases. As the Y2O3 content increased, the wrapped W crystals of the W-Ni-Cu-(<= 0.4%)Y2O3 alloys were refined. When the Y2O3 content increased to 0.5%, the W crystals began to grow and the pores increased in amount. The densification, the bending strength and the micro-hardness of the W-Ni-Cu-Y2O3 alloys were higher compared to the W-Ni-Cu alloy. The refined and denser microstructure could enhance the mechanical properties of the W-Ni-Cu-Y2O3 alloys, while the Y2O3 aggregation would weaken the corresponding mechanical properties.
引用
收藏
页数:7
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