熔体快淬与高能球磨法相结合制备TbCu7型单相Sm-Fe-Zr-Nb合金
RARE METAL MATERIALS AND ENGINEERING（2021）
Abstract
研究了 Sm-Fe-Zr-Nb合金粉末在高能球磨过程中获得完全非晶态的相变过程.采用X射线衍射、扫描电镜和高分辨率透射电镜分析了研磨时间对Sm-Fe-Zr-Nb合金粉末的相组成及形貌的影响.结果表明:球磨2.5 h左右可得到完整的非晶态微观结构,球磨3h以上,非晶态基体中析出尺寸约5nm的α-Fe相,短程有序原子团数量增加.对球磨2.5 h后的非晶合金进行晶化处理后,得到了微观组织均匀的TbCu7型单相合金,等轴晶尺寸约30nm.该微观组织调控对改善氮化后的磁性能起关键作用.
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Key words
high-energy ball milling, amorphous, phase transformation, energy barrier, annealing crystallization
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