镍-锰-镓-钴-钆微丝中的马氏体转变和反磁焦效应

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics Pub Date : 2024-04-01 DOI:10.1016/j.intermet.2024.108276

Shiwei Fu , Jiajie Gao , Kunyu Wang , Lin Ma , Jie Zhu

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引用次数: 0

摘要

镍锰镓钴钆微丝是通过玻璃涂层熔融纺丝法制造的，具有竹节状结构。本文主要研究了镍锰镓钴钆微丝的磁熵效应，该效应用麦克斯韦方程计算的等温磁熵变化来表示。具体来说，在 5 T 磁场下，Ni43Mn30Ga19.9Co7Gd0.1 微导线的最大熵变为 11.09 J/kg-K，普遍高于目前的 Ni-Mn-Ga 微导线。此外，与其他镍锰镓微线相比，镍43Mn30Ga19.9Co7Gd0.1微线的磁熵变化最大值所对应的温度更接近室温。此外，微丝较大的比表面积将促进其在磁制冷领域的应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Martensitic transformation and inverse magnetocaloric effect in Ni-Mn-Ga-Co-Gd microwires

Ni–Mn-Ga-Co-Gd microwires were fabricated by the glass-coated melt spinning method, resulting in a bamboo-grained structure. In this paper, the magnetocaloric effect of Ni–Mn-Ga-Co-Gd microwires is mainly investigated, which is represented by the isothermal magnetic entropy change calculated using Maxwell equation. Specifically, Ni₄₃Mn₃₀Ga_19.9Co₇Gd_0.1 microwires exhibit maximum entropy change of 11.09 J/kg·K under 5 T magnetic field, which is generally greater than that of the current Ni–Mn-Ga microwires. Additionally, Ni₄₃Mn₃₀Ga_19.9Co₇Gd_0.1 microwires show the temperature corresponding to the greatest magnetic entropy change nearer to room temperature compared to other Ni–Mn-Ga microwires. Furthermore, the larger specific surface area of microwires will facilitate their application in the field of magnetic refrigeration.

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来源期刊

Intermetallics 工程技术-材料科学：综合

CiteScore

7.80

自引率

9.10%

发文量

291

审稿时长

37 days

期刊介绍： This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys. The journal reports the science and engineering of metallic materials in the following aspects: Theories and experiments which address the relationship between property and structure in all length scales. Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations. Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties. Technological applications resulting from the understanding of property-structure relationship in materials. Novel and cutting-edge results warranting rapid communication. The journal also publishes special issues on selected topics and overviews by invitation only.