Ma Siyao, Zhang Xuexi, Zheng Guangping, Qian Mingfang, Geng Lin
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong, China.
Materials (Basel). 2023 Aug 21;16(16):5725. doi: 10.3390/ma16165725.
Solid-state refrigeration technology is expected to replace conventional gas compression refrigeration technology because it is environmentally friendly and highly efficient. Among various solid-state magnetocaloric materials, Ni-Mn-based ferromagnetic shape memory alloys (SMAs) have attracted widespread attention due to their multifunctional properties, such as their magnetocaloric effect, elastocaloric effect, barocaloric effect, magnetoresistance, magnetic field-induced strain, etc. Recently, a series of in-depth studies on the thermal effects of Ni-Mn-based magnetic SMAs have been carried out, and numerous research results have been obtained. It has been found that poor toughness and cyclic stability greatly limit the practical application of magnetic SMAs in solid-state refrigeration. In this review, the influences of element doping, microstructure design, and the size effect on the strength and toughness of Ni-Mn-based ferromagnetic SMAs and their underlying mechanisms are systematically summarized. The pros and cons of different methods in enhancing the toughness of Ni-Mn-based SMAs are compared, and the unresolved issues are analyzed. The main research directions of Ni-Mn-based ferromagnetic SMAs are proposed and discussed, which are of scientific and technological significance and could promote the application of Ni-Mn-based ferromagnetic SMAs in various fields.
固态制冷技术有望取代传统的气体压缩制冷技术，因为它环保且高效。在各种固态磁热材料中，镍锰基铁磁形状记忆合金（SMAs）因其多功能特性，如磁热效应、弹热效应、压热效应、磁阻、磁场诱导应变等，而受到广泛关注。近年来，对镍锰基磁性形状记忆合金的热效应进行了一系列深入研究，并取得了众多研究成果。研究发现，韧性差和循环稳定性低极大地限制了磁性形状记忆合金在固态制冷中的实际应用。在这篇综述中，系统总结了元素掺杂、微观结构设计和尺寸效应对镍锰基铁磁形状记忆合金强度和韧性的影响及其潜在机制。比较了不同方法在提高镍锰基形状记忆合金韧性方面的优缺点，并分析了尚未解决的问题。提出并讨论了镍锰基铁磁形状记忆合金的主要研究方向，这些研究方向具有科学技术意义，能够促进镍锰基铁磁形状记忆合金在各个领域的应用。
