稀土掺杂全过渡族Ni37Co13Mn35Ti15-xRx(R=Er,Dy)合金条带的马氏体相变及磁热效应

doi:10.19976/j.cnki.43-1448/TF.2026003

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Abstract Amid the dual challenges of global warming and the energy crisis, magnetic refrigeration technology has emerged as a promising solution. Utilizing the magnetocaloric effect, this technology offers advantages such as high efficiency, energy conservation, and environmental friendliness, making it a potential alternative to conventional gas compression refrigeration. Among magnetocaloric materials, Heusler-type Ni-Mn-based alloys have attracted significant attention, primarily due to their tunable magnetic phase transitions and remarkable magnetocaloric effects. In this study, Heusler alloy Ni₃₇Co₁₃Mn₃₅Ti_15-_xR_x (x=0.3, 0.5, 0.7, 1.0) ribbons were prepared via the melt-spinning method, focusing on the effects of rare-earth Er and Dy doping on the martensitic transformation behavior and magnetocaloric properties. The results indicate that the martensitic transformation temperature (T_t) of the alloys initially increases and subsequently decreases with rising rare-earth content. Specifically, it rises significantly from 190 K (0.1 T) for the undoped Ni₃₇Co₁₃Mn₃₅Ti₁₅ to above room temperature, then declining back to the vicinity of room temperature at x=1.0. Overall, the T_t of Dy-doped samples are higher than those of Er-doped samples. Ni₃₇Co₁₃Mn₃₅Ti_14.5Dy_0.5 exhibits the optimal magnetocaloric performance, its maximum magnetic entropy change is superior to that of the undoped sample, reaching 15.31 J/(kg·K) under a magnetic field change of 0-5 T. For the Ni₃₇Co₁₃Mn₃₅Ti₁₄Dy₁, the peak of the magnetic entropy change shifts rapidly towards lower temperatures with increasing magnetic field, resulting in the widest refrigeration temperature window. Furthermore, clear lath-like martensitic microstructures are observed in Ni₃₇Co₁₃Mn₃₅Ti_14.5Dy_0.5, providing important structural evidence for understanding the variations in its properties.

Key words： Heusler-type Ni-Mn-based alloy magnetic refrigeration technology magnetocaloric effect Er doping Dy doping

Received: 12 January 2026 Published: 03 July 2026

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	LIU Meng
	CHEN Hanxiao
	WANG Zihan
	SHEN Bangpo
	XU Lei
	ZHANG Zhishuo
	HU Qiubo
	MA Shengcan

Cite this article:

LIU Meng,CHEN Hanxiao,WANG Zihan, et al. Martensitic transformation and magnetocaloric effect of rare earth-doped all-d-metal Ni₃₇Co₁₃Mn₃₅Ti_15-_xR_x (R=Er, Dy) alloy ribbons[J]. Materials Science and Engineering of Powder Metallurgy, 2026, 31(3): 283-296.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2026003 OR http://pmbjb.csu.edu.cn/EN/Y2026/V31/I3/283

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