Title :
Nitrogenation effect of the reduction-diffusion Sm2Fe 17 powders
Author :
Liu, T.Y. ; Chang, W.C. ; Chen, C.J. ; Chin, T.Y. ; Wu, C.D.
Author_Institution :
Mater. Res. Lab., Ind. Technol. Res. Inst., Chutung, Taiwan
fDate :
9/1/1992 12:00:00 AM
Abstract :
Attempts have been made to prepare Sm2Fe17 powders by the reduction-diffusion (RD) method for making Sm2Fe17Nx magnetic powders. By using the RD method, it is possible to omit the subsequent homogenization treatment for eliminating the magnetically soft α-Fe phase. By adopting a suitable nitriding treatment, the magnetic properties of the RD Sm2Fe17Nx powders also exhibit identical or higher values than those of vacuum induction model (VM) Sm 2Fe17Nx powders. It is indicated that the RD method might be a cost-effective way for mass producing the starting materials of Sm2Fe17Nx magnets
Keywords :
X-ray diffraction examination of materials; coercive force; ferromagnetic properties of substances; heat treatment; iron alloys; magnetic properties of fine particles; magnetisation; nitridation; permanent magnets; powder metallurgy; reduction (chemical); remanence; samarium alloys; thermal analysis; Sm2Fe17Nx magnetic powders; Sm2Fe17Nx magnets; X-ray diffraction; crystal structure; differential thermal analyser; homogenization treatment; intrinsic coercivity; magnetic properties; magnetisation; nitriding treatment; nitrogenation effect; particle size; reduction-diffusion method; vacuum induction model; Absorption; Coercive force; Hydrogen; Iron; Magnetic properties; Powders; Samarium; Temperature; Virtual manufacturing; X-ray diffraction;
Journal_Title :
Magnetics, IEEE Transactions on
