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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
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- DOI:
- 作者:
- 邓妮,闫育洁,梁航,魏晨,贺一轩,王军
DENG Ni, YAN Yujie, LIANG Hang, WEI Chen,HE Yixuan
- 作者单位:
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China
- 关键词:
- 高熵合金;磁场热处理;磁性能;相变
High-entropy alloy; Magnetic field heat treatment; Magnetic property; Phase transition
- 摘要:
- 以AlCoCrCuFeNi高熵合金为研究对象,研究了磁场热处理过程中合金组织结构及磁性的变化。研究表明,磁场热处理相对于无磁场能够在更短的时间内显著优化合金的磁性能。从原子固溶和相转变两方面分析了磁性变化的原因。主要结果如下:在双相AlCoCrCuFeNi高熵合金中,施加磁场热处理相对于无磁场不会导致衍射峰的移动及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 property of AlCoCrCuFeNi high-entropy alloy heat treated with magnetic field were studied. It is shown that magnetic field heat treatment can significantly optimize the magnetic properties of alloy in a shorter time than without magnetic field. The reason for magnetic property change is analyzed from the aspects of atomic solid solution and phase transition. The main results are as follows: in the dual-phase AlCoCrCuFeNi high-entropy alloy, the application of magnetic field does not lead to the shift of diffraction peaks and the change of lattice constants of FCC and BCC phases compared with heat treated without magnetic field. Applying magnetic field does not change the content of magnetic elements in each phase. However, applying magnetic field promotes the FCC-BCC phase transition and changes the atomic spacing. When the alloy is heat treated with 10 T magnetic field for 30 h, the saturation magnetization reaches 35.87 emu/g, which is 24.9% higher than without magnetic field.