Influence of cooling rate on magneto-structural transition and magnetocaloric effect of Ni30Cu8Co12Mn37Ga13 alloy

被引：3
作者：
Jiang, Zhu-jun [1 ]
Wu, Yu-ye [1 ,2 ]
Wang, Jing-min [1 ]
Jiang, Cheng-bao [1 ]
机构：
[1] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
[2] Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China
来源：
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL | 2017年 / 24卷 / 07期
关键词：
Ferromagnetic shape memory alloy; Heat treatment; Martensitic transformation; Magnetocaloric effect; Cooling rate; Magneto-structural transition; SHAPE-MEMORY ALLOYS; MARTENSITIC-TRANSFORMATION; PHASE-TRANSFORMATION; MAGNETIC-PROPERTIES; RIBBONS; MICROSTRUCTURE; BEHAVIOR;
D O I：
10.1016/S1006-706X(17)30107-3
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The influence of heat treatment with different cooling rates on phase transition behaviors and magnetocaloric effect is systematically studied. Difference in atomic order is induced by changing cooling rates, where ordered phase is obtained in the furnace cooled (FC) sample while disordered phase is reserved in the water quenched (WQ) sample. The coupled magneto-structural transition is detected in both samples but the characteristic temperature significantly shifts to lower temperatures with increasing atomic order. Giant magnetic entropy change (Delta S-ma) derived from magnetic field induced martensitic transformation is confirmed for both samples, and can he remarkably enhanced by the atomic ordering. The largest Delta S-mag of 20. 9 J/(kg . K) is obtained at 307. 5 K under 5 T in the FC sample.
引用
收藏
页码：711 / 717
页数：7
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