Gong Yong, Miao Xuefei, Qian Fengjiao, Xu Feng, Caron Luana
School of Materials Science and Engineering, Nanjing University of Science and Technology, 210094 Nanjing, People's Republic of China.
College of Physics, Nanjing University of Aeronautics and Astronautics, 210016 Nanjing, People's Republic of China.
J Phys Condens Matter. 2024 Sep 27;36(50). doi: 10.1088/1361-648X/ad7cb3.
Magnetic cooling, a solid-state refrigeration technology based on the magnetocaloric effect, has attracted significant attention in space cooling due to its high energy-efficiency and environmental friendliness. Transition metal-based magnetocaloric materials (MCMs) with the merit of low-cost have emerged as promising candidates for efficient magnetic refrigeration applications. This review explores the intricate relationship between microstructure and multiple properties (e.g. magnetocaloric properties, mechanical stability, thermal conductivity, and functional reversibility) of these materials. A variety of microstructural manipulation approaches (e.g. crystallographic texture, precipitates, micropores, atomic-scale defects, size effect, and composites) are examined for their effects on the comprehensive performance of MCMs. We show that microstructure design provides an effective tool to achieve excellent performance in multiple aspects, which may facilitate the commercialization of transition-metal based MCMs.
磁制冷是一种基于磁热效应的固态制冷技术，因其高能效和环境友好性，在空间制冷领域备受关注。具有低成本优点的过渡金属基磁热材料已成为高效磁制冷应用的有前景候选材料。本综述探讨了这些材料的微观结构与多种性能（如磁热性能、机械稳定性、热导率和功能可逆性）之间的复杂关系。研究了各种微观结构调控方法（如晶体织构、析出物、微孔、原子尺度缺陷、尺寸效应和复合材料）对磁热材料综合性能的影响。我们表明，微观结构设计为在多个方面实现优异性能提供了有效工具，这可能有助于过渡金属基磁热材料的商业化。
