DyHoErTm高熵合金的相组织和磁热性能研究
Study on Phase Structure and Magnetocaloric Properties of DyHoErTm High-Entropy Alloy
DOI: 10.12677/ms.2026.164078, PDF,    科研立项经费支持
作者: 方 凯, 程思瑜, 唐政煌, 邵艳艳*：南京理工大学材料科学与工程学院，江苏 南京；赵德伟：河北师范大学物理学院，河北 石家庄
关键词: DyHoErTm；高熵合金；磁相变；磁熵变；磁制冷；DyHoErTm； High-Entropy Alloy； Magnetic Phase Transition； Magnetic Entropy Change； Magnetic Refrigeration
摘要: 氢气作为替代传统化石能源的清洁载体，是构建绿色低碳能源体系的重要支柱。低温磁制冷技术凭借其高能效、低能耗与环境友好的优势，为氢气液化提供了变革性方案，而高性能磁热材料的研发成为攻克该技术瓶颈的关键。尽管多种磁热材料已在不同温区展现出优异性能，但工作温区狭窄、可调性差的共性问题，仍严重制约其实际应用，亟待解决。本文采用电弧熔炼法制备了DyHoErTm高熵合金，研究了其相组成、微观形貌和磁相变行为。在5 T磁场下，该合金最大磁熵变为8.63 J·kg−1·K−1，相对制冷功率达841.4 J·kg−1，在液氢温区磁制冷领域具有良好的应用潜力。
Abstract: Hydrogen, as a clean carrier to replace traditional fossil fuels, is a crucial pillar for building a green and low-carbon energy system. Low-temperature magnetic refrigeration technology, with its advantages of high energy efficiency, low energy consumption, and environmental friendliness, offers a transformative solution for hydrogen liquefaction. The development of high-performance magnetocaloric materials has become key to overcoming the bottleneck of this technology. Although various magnetocaloric materials have demonstrated excellent performance in different temperature ranges, the common issues of narrow operating temperature ranges and poor adjustability severely constrain their practical application, demanding an urgent solution. This paper reports on a DyHoErTm high-entropy alloy prepared by arc melting, investigating its phase composition, microstructure, and magnetic phase transition behavior. Under a magnetic field of 5 T, this alloy exhibits a maximum magnetic entropy change of 8.63 J·kg−1·K−1 and a relative cooling power of 841.4 J·kg−1, indicating promising potential for magnetic refrigeration applications in the liquid hydrogen temperature range.
文章引用：方凯, 程思瑜, 唐政煌, 赵德伟, 邵艳艳. DyHoErTm高熵合金的相组织和磁热性能研究[J]. 材料科学, 2026, 16(4): 110-117. https://doi.org/10.12677/ms.2026.164078

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