Phase equilibria and magnetic properties in Mn-Ga-Cu ternary alloys

被引：6

作者：

Minakuchi, Kazuhiro ^{[1
]}

Sasaki, Masahiro ^{[2
]}

Ito, Wataru ^{[2
]}

Nagasako, Makoto ^{[3
]}

Kainuma, Ryosuke ^{[1
]}

机构：

[1] Tohoku Univ, Grad Sch Engn, Dept Mat Sci, Sendai, Miyagi 9808579, Japan

[2] Sendai Natl Coll Technol, Natori, Miyagi 9811239, Japan

[3] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 611卷

基金：

日本学术振兴会;

关键词：

Phase equilibria; Martensitic transformation; Rear-earth free magnet; Coercivity; Mn3Ga; RICH PORTION; SYSTEM; TRANSFORMATION; BINARY;

D O I：

10.1016/j.jallcom.2014.05.107

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Phase equilibria at 600 and 800 degrees C and magnetic properties of some selected alloys in the low Ga portion of the Mn-Ga-Cu ternary system were investigated. It was clarified that the alpha-fcc (gamma Mn, Cu) and beta-bcc (delta Mn, Cu3Ga) phase exist in a wide composition range along the Ga-Cu side at 800 degrees C, while a very stable ternary compound, tau(2) (Cu5Ga3Mn4, hP12), appears in the center of the low Ga region at 600 degrees C. It was also confirmed that all the beta phase specimens quenched from 800 degrees C martensitically transform to the 2H, 2M or 6M phase with high density of stacking faults. In the Mn-19.0Ga-25.8Cu (at.%) martensite alloy followed by aging at 400 degrees C, a high coercivity of 11.7 kOe was detected, which may have resulted from the dispersion of the metastable ferrimagnetic Mn3Ga-D0(22) phase during the aging treatment. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：284 / 291

页数：8

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