Reduction-diffusion preparation of Nd15Fe77B8, NdFe11,Ti, NdFe10.5Mo1.5 and NdFe10.75Mo1.25 alloys for magnets

被引：0

作者：

Guilherme, E. G. ^{[1
]}

Hechenberg, H. R. ^{[2
]}

Pascoal, J. O. A. ^{[1
]}

机构：

[1] Univ Sao Paulo, IPEN, CNEN, Dept Mat Sci & Technol, CP 11049, BR-05522970 Sao Paulo, SP, Brazil

[2] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil

来源：

ADVANCED POWDER TECHNOLOGY V | 2006年 / 530-531卷

关键词：

reduction-diffusion calciothermic process; hard magnetic materials; intermetallic compounds; nitrogenation;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The calciothermic reduction-diffusion (CRD) process is a alternative preparation route for Nd15Fe77B8, NdFe11Ti, NdFe10.5Mo1.5 and NdFe10.75Mo1.25 alloys, which eliminates the need for long homogenizing heat treatment; in addition, the resulting alloy is already in powder form. We have examined the effect of various processing variables in the preparation of mother alloys. Compacts made of NdCl3, Fe, Ti, Mo and Fe-B powders and Ca granules were heated under argon for different times and temperatures. The alloys as-prepared contained mostly the hard magnetic phase. The NdFe11Ti, NdFe10.75Mo1.25 and NdFe10.5Mo1.5 alloys have been successfully nitrogenated by heating a mixture of powdered alloys with sodium azide (NaN3) at temperatures between 330 and 450 degrees C.

引用

页码：181 / +

页数：2