Influence of cooling rate on magneto-structural transition and magnetocaloric effect of Ni30 Cu8 Co12 Mn37 Ga13 alloy

IF 3.1 2区 材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING
Zhu-jun Jiang , Yu-ye Wu , Jing-min Wang , Cheng-bao Jiang
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引用次数: 3

Abstract

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 (ΔSmag) derived from magnetic field induced martensitic transformation is confirmed for both samples, and can be remarkably enhanced by the atomic ordering. The largest ΔSmag of 20. 9 J/(kg · K) is obtained at 307. 5 K under 5 T in the FC sample.

冷却速率对Ni30 Cu8 Co12 Mn37 Ga13合金磁结构转变及磁热效应的影响
系统研究了不同冷却速率热处理对相变行为和磁热效应的影响。原子有序的差异是由冷却速率的变化引起的,其中在炉冷(FC)样品中得到有序相,而在水淬(WQ)样品中保留无序相。在两种样品中都检测到耦合磁结构转变,但随着原子有序度的增加,特征温度明显向较低的温度转移。两种样品均证实了磁场诱导马氏体相变引起的巨磁熵变化(ΔSmag),并可通过原子有序度显著增强。最大的ΔSmag 20。在307时得到9 J/(kg·K)。在FC样品中5k在5t下。
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来源期刊
CiteScore
4.30
自引率
0.00%
发文量
2879
审稿时长
3.0 months
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