Phase transition and magnetocaloric effect of Ni50Mn29Ga21-xTbx (0 ≤ x ≤ 1) alloys

被引：15

作者：

Wu, Yuye ^{[1
]}

Wang, Jingmin ^{[1
]}

Hua, Hui ^{[1
]}

Jiang, Chengbao ^{[1
]}

Xu, Huibin ^{[1
]}

机构：

[1] Beihang Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Aerosp Mat & Performance, Beijing 100191, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 632卷

基金：

北京市自然科学基金;

关键词：

Ni-Mn-Ga; Martensitic transformation; Magneto-structural transition; Magnetocaloric effect; MARTENSITIC-TRANSFORMATION; MAGNETIC-FIELD; MEMORY; MICROSTRUCTURE; TEMPERATURE;

D O I：

10.1016/j.jallcom.2015.01.279

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：

Ni50Mn29Ga21 Tb-x(x) (0 <= x <= 1) alloys were studied with the microstructure, phase transition, and magnetocaloric effect. Dual-phase microstructure containing the martensite matrix and Tb-rich precipitations were formed. The martensitic transformation was observed over the whole composition range, with the transformation temperature T-M significantly increased by the addition of terbium. The magnetic transition temperatures of the austenite and martensite, i.e. T-C(A) and T-C(M), were monitored for 0 <= x <= 0.16 and 0.27 <= x <= 1, respectively. Both T-C(A) and T-C(M) were slightly decreased by the addition of terbium. For 0.16 <= x <= 0.27 the martensitic transformation was coincided with the magnetic transition in case of T-M = T-C, giving rise to the coupled magneto-structural transition from ferromagnetic martensite to paramagnetic austenite. Sizable magnetic entropy change was induced by magnetic field in the vicinity of the coupled magneto-structural transition. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：681 / 685

页数：5

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