Effect of Co addition on the martensitic transformation and magnetocaloric effect of Ni-Mn-Al ferromagnetic shape memory alloys

被引：43

作者：

Xuan, H. C. ^{[1
]}

Chen, F. H. ^{[2
]}

Han, P. D. ^{[1
]}

Wang, D. H. ^{[3
,4
]}

Du, Y. W. ^{[3
,4
]}

机构：

[1] Taiyuan Univ Technol, Coll Mat Sci & Engn, Taiyuan 030024, Peoples R China

[2] Taiyuan Univ Sci & Technol, Dept Phys, Taiyuan 030024, Peoples R China

[3] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[4] Nanjing Univ, Key Lab Nanomat Jiang Su Prov, Nanjing 210093, Jiangsu, Peoples R China

来源：

INTERMETALLICS | 2014年 / 47卷

基金：

高等学校博士学科点专项科研基金;

关键词：

Magnetic intermetallics; Magnetic properties; Martensitic transformation; FIELD-INDUCED STRAINS; MAGNETIC-PROPERTIES; HEUSLER ALLOYS; TRANSITIONS; ORDER;

D O I：

10.1016/j.intermet.2013.12.007

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：

A series of Ni50-xCoxMn32Al18 (x = 3, 4, 5, 6, 7, and 8) alloys were prepared by the arc melting method. The martensitic transformation (MT) shifts to a lower temperature with increasing Co concentration and can be tuned to occur from a ferromagnetic austenite to a weak-magnetic martensite in the range of 6 <= x <= 8. The field-induced metarnagnetic behavior was realized in Ni42Co8Mn32Al18 sample in which a large magnetic entropy change of 7.7 j/kg K and an effective refrigerant capacity value of 112 J/kg were obtained under the field of 60 kOe. The large magnetocaloric effect and adjustable MT temperature suggest that Ni-Co-Mn Al alloys should have promising potential as magnetic refrigerants. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：31 / 35

页数：5

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