Electron microscopy studies of the oxidation of Nd-Fe-B magnets

被引：0
|
作者：
Li, Y [1 ]
Aindow, M [1 ]
Evans, HE [1 ]
Harris, IR [1 ]
机构：
[1] Univ Birmingham, Sch Met & Mat, Birmingham B15 2TT, W Midlands, England
来源：
ELECTRON MICROSCOPY AND ANALYSIS 1999 | 1999年 / 161期
关键词：
D O I：
暂无
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
The oxidation microstructure and mechanism of a commercial NdFeB magnet have been investigated using x-ray diffraction and electron microscopy. Oxidation leads to decomposition of the Nd2Fe14B matrix phase into a mixture of nanocrystalline alpha-Fe and amorphous Nd-(B)-oxide and transformation of the Nd-rich intergranular phase from f.c.c Nd with a NdOX ordered superlattice into h.c.p-Nd2O3. The high oxygen concentration and the morphology of the decomposition front of the oxidation layer suggest that oxygen transport through the alpha-Fe / Nd-(B)-oxide interfaces is the mechanism controlling the oxidation kinetics.
引用
收藏
页码：483 / 486
页数：4
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