Microstructure of CoCrFeNiTiCuMoxVx High Entropy Alloy PowderPrepared by Mechanical Alloying
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摘要: 采用高能行星式球磨机对CoCrFeNiTiCuMoxVx（x=0.5，1.0，1.5，2.0，原子比）粉末进行机械合金化制备高熵合金粉末，利用X射线衍射、扫描电镜、透射电镜研究了钼和钒含量对合金粉末物相组成、晶粒尺寸、晶格应变的影响。结果表明：高能球磨后，纯金属相的衍射峰消失，得到了BCC+FCC双相结构的合金粉末；随着钼和钒含量的增加，BCC相含量增加，FCC相减少；合金粉末颗粒的尺寸在100~200 nm，颗粒呈扁平片状，随着钼和钒含量的增加，合金粉末的晶粒尺寸减小，晶格应变增大。Abstract: CoCrFeNiTiCuMoxVx(x=0.5,1.0,1.5,2.0, atomic ratio) powder was mechanically alloyed in a high-energy planetary ball mill to prepare high entropy alloy powder, and influence of molybdenum and vanadium content on the phase composition, grain size and lattice strain of the alloy powder was studied by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The results show that the diffraction peaks of pure metal phases disappeared, and the alloy powder with a dual-phase structure of BCC+FCC was obtained after high-energy ball milling. The content of BCC phase increased, FCC phase decreased with the increase of molybdenum and vanadium content. The alloy powder particle size was between 100-200 nm, and the particles were flat. The grain size of the alloy powder decreased and the lattice strain increased as the content of molybdenum and vanadium increased.
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Keywords:
- mechanical alloying /
- high entropy alloy powder /
- phase composition /
- grain size /
- lattice strain
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