MAGNETICALLY HARD SM2FE17NX PREPARED BY NITRIDING MELT-SPUN RIBBONS

被引：44

作者：

PINKERTON, FE

FUERST, CD

机构：

[1] Physics Department, General Motors Research and Environmental Staff, Warren

来源：

APPLIED PHYSICS LETTERS | 1992年 / 60卷 / 20期

关键词：

D O I：

10.1063/1.106912

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have obtained magnetically hard Sm-Fe-N ribbons with a room-temperature intrinsic coercivity H(ci) = 23 kOe by nitriding melt-spun Sm-Fe precursor ribbons. Best results are obtained by grinding the ribbons to a < 25-mu-m powder, then heat treating the powder in vacuum for 1 h at 700-degrees-C prior to nitriding in N2 gas at 450-480-degrees-C. X-ray diffraction shows that the primary phase is rhombohedral Sm2Fe17Nx, or possibly the disordered hexagonal modification of this phase having the TbCu7 structure. Higher coercivities will be obtainable if the volume fraction of soft magnetic impurity phases, such as alpha-Fe, can be reduced by optimizing the composition and processing.

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页码：2558 / 2560

页数：3

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