Martensitic transformation, structure and magnetic properties of Co-Ni-Ga ferromagnetic shape memory alloys

被引：2
|
作者：
Kostrubiec, B. [1 ]
Prusik, K. [1 ]
Madej, L. [1 ]
Morawiec, H. [1 ]
机构：
[1] Silesian Univ, Inst Mat Sci, 12 Bankowa, PL-40007 Katowice, Poland
来源：
APPLIED CRYSTALLOGRAPHY XX | 2007年 / 130卷
关键词：
FSMA; ferromagnetic shape memory alloys; two phase; gamma phase;
D O I：
10.4028/www.scientific.net/SSP.130.141
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
In the present paper the effect of heat treatment on microstructure, martensitic transformation temperatures and magnetic properties behavior of Co-Ni-Ga pollycrystal was discussed in detail. Microscopic observations revealed two types of two phase polycrystalline alloys: i) martensite with gamma-precipitates and ii) parent phase with gamma-precipitates. Making use of Xray and electron diffraction methods the crystal structure of martensite phase was identified as bet structure (with c(o)/a(o) about 1.2). Annealing of Co-Ni-Ga alloy at 1223K/40 min causes a separation of martensitic and magnetic transformation and an increase of the Curie temperature by about 70K, after this annealing any significant structural changes in the parent (martensitic) and gamma phase are not observed.
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页码：141 / +
页数：2
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