添加剂(2Fe)·(Sn)对SmCo5永磁体X射线衍射相对强度I200/I111影响的研究

本文研究了SmCo₅永磁体添加剂(2Fe)·(Sn)后Fe和Sn原子进入晶格对X射线衍射相对强度的影响,得出:Sn原子较易置换3g位上的Co原子,而Fe原子可以置换各个晶位上的Co原子,比较起来置换2c晶位上的Co原子更容易一些,3g位上的Co原子被Sn原子置换会增高I₂₀₀/I₁₁₁的比值,但使强度比改变的原因还有取向、形成Fe和Sn原子有序排列、应力状态改善和控制了～750℃相变的缘故。 关键词：

A STUDY OF THE INFLUENCE OF ADDITIVE AGENTS (2Fe)· Sn ON X-RAY DIFFRACTION RELATIVE INTENSITY I200/I111 OF PERMANENT MAGNET SmCo5

The effect of entering of Fe-atoms and Sn-atoms into crystal lattice of permanent magnet SmCo₅ on the X-ray diffraction relative intensities is studied. It is observed that the Fe-atoms can replace the Co-atoms on any site, but they replace Co_2c more readily.However, the Sn-atoms replace the Co-atoms or 3 g sites more easily. The replacement of Co-atoms by the Sn-atoms can increases the ratio of X-ray diffraction relative intensity I₂₀₀/I₁₁₁, but the striking changes of this ratio is largely due to the alignment, the order of Fe, Sn atoms, the improvement of internal stress conditions, and the controlling of the ～750℃ phase transformation.