Effect of nano-Y2O3 on microstructure and mechanical properties of W–Ni–Cu alloys. (22nd August 2018)

• Record Type: Journal Article
• Authors: Li, Wensheng; Dong, Hongfeng
• Is Part Of: Materials research express. Volume 5:Number 10(2018)
• Publication Date: 2018-08-22
• Subjects: W–Ni–Cu alloy -- nano-Y2O3 -- microstructure -- mechanical properties; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/aad996
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: The mechanical properties and microstructures of the W–Ni–Cu–Y2 O3 alloys with different Y2 O3 contents through cold pressing/sintering were investigated. The results demonstrated that the W–Ni–Cu–Y2 O3 alloys mainly included the W, (Ni, Cu) and Y2 O3 phases. As the Y2 O3 content increased, the wrapped W crystals of the W–Ni–Cu–(≤0.4%)Y2 O3 alloys were refined. When the Y2 O3 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–Y2 O3 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–Y2 O3 alloys, while the Y2 O3 aggregation would weaken the corresponding mechanical properties.