【摘要】 以Sm₅Co₂合金为例,提出了富Sm型单相纳米晶结构的Sm-Co合金的制备方法.物相分析和显微组织观测表明,Sm₅Co₂合金只含有纯净的单斜结构Sm₅Co₂相,晶粒组织细小均匀,平均晶粒尺寸约为10 nm.在此基础上,对制备的单相Sm₅Co₂纳米晶合金块体材料的磁性能和力学性能进行了全面表征和分析.结果表明,与同种成分的粗晶合金相比,纳米晶Sm₅Co₂合金的磁性能明显提高.且硬度和弹性模量均有不同程度增加.更多还原

【Abstract】 In the present work,a novel way has been developed to prepare the single-phase nanocrystalline Sm₅Co₂ alloy.The microstructure and phase constitution were characterized,and it was showed that the nanocrystalline Sm₅Co₂ alloy has ultra-fine and homogenous nanograin structure with an average grain size of about 10 nm.Moreover,the magnetic and mechanical properties of the Sm₅Co₂ nanocrystalline bulk were characterized in details,and both properties were enhanced as compared with those of the conventional polycrystalline counterparts.更多还原