Enhanced magnetic entropy change and working temperature interval in Ni–Mn–In–Co alloys
作者： Xuexi Zhang , Mingfang Qian , Shengpei Miao , Ruizhe Su , Yanfen Liu
DOI: 10.1016/J.JALLCOM.2015.09.212
关键词: Martensite 、 Austenite 、 Annealing (metallurgy) 、 Alloy 、 Magnetic refrigeration 、 Thermodynamics 、 Magnetization 、 Metallurgy 、 Magnetic shape-memory alloy 、 Magnetic field 、 Materials science 、 Mechanical engineering 、 Materials Chemistry 、 Mechanics of Materials 、 Metals and Alloys
摘要: Abstract High magnetic entropy change and wide working temperature interval are both of great importance for the application refrigerant materials. Here Ni–Mn–In–Co alloys with oligocrystalline structure were produced by annealing heat treatment giant magnetocaloric effect large confirmed. The increases magnetization difference ΔM between martensite austenite. annealed alloy subjects to a reverse austenite an intermediate phase transformation upon heating. two-stage field-induced transformation, contribute maximum 37.1 J/kgK at 309 K under field 50000 Oe, observed first time. In addition, broadened ∼22 K was obtained owing transformation. room-temperature MCE in quaternary is promising refrigeration.
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