强磁场对AlCoCrCuFeNi高熵合金磁性能的影响  

Effect of High Magnetic Field on Magnetic Property of AlCoCrCuFeNi High-Entropy Alloy

作　　者：邓妮 闫育洁 赵勇 魏晨 贺一轩 王军[1] DENG Ni;YAN Yujie;ZHAO Yong;WEI Chen;HE Yixuan;WANG Jun(State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710072,China)

机构地区：[1]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《铸造技术》2022年第8期600-604,I0030,共6页Foundry Technology

基　　金：国家自然科学基金(52174275);陕西省创新能力支撑计划(2020KJXX-073);凝固技术国家重点实验室自主课题(2021-TS-01)。

摘　　要：以Al CoCrCuFeNi高熵合金为对象,研究了磁场热处理过程中合金组织结构及磁性能的变化,从原子固溶和相转变两方面分析了磁性变化的原因。结果表明,磁场热处理相对于无磁场能在更短时间内显著优化合金的磁性能。在双相Al CoCrCuFeNi高熵合金中,施加磁场热处理相对于无磁场不会导致FCC相和BCC相晶格常数的变化。磁场热处理后合金各相中磁性元素含量相对无磁场变化不超过1%。但是磁场热处理相对无磁场促进了FCC-BCC相变及改变原子间距。磁场热处理30 h时,饱和磁化强度可达35.87 emu/g,相对无磁场提高了约24.9%。The microstructure and magnetic properties of Al CoCrCuFeNi high-entropy alloy during magnetic field heat treatment were studied.The reason of magnetic property change was analyzed in terms of atomic solution and phase transition.The results show that magnetic field heat treatment can significantly optimize the magnetic properties of the alloy in a shorter time than that without magnetic field.In the dual-phase Al CoCrCuFeNi high-entropy alloy,applying magnetic field heat treatment does not lead to the change of lattice constants of FCC phase and BCC phase and the change of magnetic elements content in each phase is less than 1%compared with that heat treated without magnetic field.However,applying magnetic field heat treatment promotes the FCC-BCC phase transition and changes the atomic spacing compared with non-magnetic field heat treatment.The saturation magnetization reaches 35.87 emu/g when the alloy is heat treated for30 h with 10 T magnetic field,which is about 24.9%higher than that without magnetic field.

关 键 词：高熵合金 磁场热处理 磁性能 相变 

分 类 号：TG156.97[金属学及工艺—热处理]