On the enhancement of the coercivity of HDDR-processed Sm2Fe17N3

被引：0

作者：

Dempsey, NM ^{[1
]}

Wendhausen, PAP ^{[1
]}

Gebel, B ^{[1
]}

Muller, KH ^{[1
]}

Coey, JMD ^{[1
]}

机构：

[1] IFW Dresden, Inst Met Werkstoffe, D-01171 Dresden, Germany

来源：

RARE-EARTH MAGNETS AND THEIR APPLICATIONS, VOLS 1 AND 2 - PROCEEDINGS OF THE 14TH INTERNATIONAL WORKSHOP | 1996年

关键词：

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The HDDR process has been combined with a milling procedure to produce isotropic Sm2Fe17N3 powders with coercivity values up to 3,3 T. The benefit of particle size reduction by milling becomes clear for material with a particle size of less than 20 um. Addition of excess Sm during milling is needed to compensate for Sm losses through evaporation and oxidation during the high temperature HDDR heat treatments of these fine powders. The milling process is effective when performed either before or after the disproportionation stage but is ineffective after HDDR. Furthermore, a simple annealing treatment of these milled powders under argon for temperatures and times comparable to those used during recombination of optimally processed HDDR material does not lead to the same high values of coercivity upon nitrogenation.

引用

页码：A349 / A358

页数：4