Phase transformation behaviours of Ti-Ni and Ti-Ni-Cu shape memory alloy powders fabricated by mechanical alloying

被引：0

作者：

Nam, TH ^{[1
]}

Hur, SG ^{[1
]}

Ahn, IS ^{[1
]}

机构：

[1] Gyeong Sang Natl Univ, Dept Mat & Met Engn, Chinju 660701, Gyeong Nam, South Korea

来源：

ADVANCES IN POWDER METALLURGY & PARTICULATE MATERIALS - 1997 | 1997年

关键词：

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ti-Ni and Ti-Ni-Cu alloy powders have been fabricated by mechanical alloying, and then phase transformation behaviours were investigated by means of X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis and transmision electron microscopy. The size of Ti-Ni-Cu alloy powders obtained decreased by increasing Cu-content. The powders of as-milled Ti-Ni and Ti-Ni-Cu alloys whose Cu-contents are less than 5 ato/o were amorphous, whereas those of as-milled Ti-Ni-Cu alloys whose Cu-content is more than 10 at% were crystalline. This means that Cu addition tends to suppress amorphization of Ti-Ni based alloy powders. The monoclinic B19' martensite is formed in the Ti-Ni-Cu alloy powders whose Cu-content is less than 10 at%, whereas the orthorhombic B19 martensite is formed in those whose Cu-content is more than 10 at%. The Fe contamination is reduced by decreasing rotating speed from 350 rpm to 250 rpm.

引用

页码：1143 / 1154

页数：12