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对主要成分为Cr72Fe18Mn10的粉末混合物进行机械球磨。采用扫描电子显微镜、X射线衍射仪和Mssbauer谱仪对球磨不同时间的样品的结构进行研究。研究结果表明在球磨过程中,存在铁磁性的αFe及Fe基的超精细场分布组元和顺磁性的Cr基固溶体,球磨30h能形成顺磁性的纳米晶CrFeMn合金;样品的矫顽力随球磨时间的延长先增加后减小,球磨12h时样品的矫顽力最大,为17.313kA/m;球磨样品在高于Cr的奈尔温度退火后场冷却时的矫顽力大于相应的零场冷却时的矫顽力,主要由体系中的铁磁-反铁磁交换作用所引起,其强弱随球磨时间的不同而不同。
The powder mixture with the main composition Cr72Fe18Mn10 was mechanically ball milled. The structures of the samples milled at different times were studied by scanning electron microscopy, X-ray diffraction and Mssbauer spectrometer. The results show that in the milling process, there are ferromagnetic αFe and Fe-based ultra-fine field components and paramagnetic Cr-based solid solution, ball milling 30h to form a paramagnetic nanocrystalline CrFeMn alloy; the coercivity of the sample with milling time , The coercive force of the sample after 12h milling is the largest, which is 17.313kA / m. The coercivity of the ball-cooled sample after annealed at a temperature higher than Cr is greater than that of the corresponding zero-field cooling Of the coercive force, mainly caused by the system of ferromagnetic - antiferromagnetic exchange caused by the strength of the milling time varies.