skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Enchancement of coercivity in high remanence HDDR Nd-Fe-B powders

Abstract

A new type of HDDR (Hydrogenation, Disproportionation, Desorption, Recombination) processing route, in which alloys are heated up under a low pressure of H{sub 2} for the disproportionation stage, was found to be an effective way of obtaining high remanence Nd-Fe-B ternary powders, with no large decrease in coercivity (which was the problem with the previous HDDR processing route, in which the alloys were heated under vacuum). The alloys with 0.5% Ga addition exhibited high coercivities of 1.0 MAm{sup {minus}1} with no degradation in remanence (B{sub r} = 1.4 T).

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Tohoku Univ., Sendai (JP)
OSTI Identifier:
20000753
Resource Type:
Journal Article
Journal Name:
IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)
Additional Journal Information:
Journal Volume: 35; Journal Issue: 5Pt2; Conference: 1999 international magnetics conference (Intermag '99), Kyongju (KR), 05/18/1999--05/21/1999; Other Information: PBD: Sep 1999; Journal ID: ISSN 0018-9464
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; IRON BASE ALLOYS; NEODYMIUM ALLOYS; BORON ALLOYS; FABRICATION; COERCIVE FORCE; GALLIUM ADDITIONS; METALLURGICAL EFFECTS

Citation Formats

Nakamura, H., Kato, K., Book, D., Sugimoto, S., Okada, M., and Homma, M. Enchancement of coercivity in high remanence HDDR Nd-Fe-B powders. United States: N. p., 1999. Web. doi:10.1109/20.800496.
Nakamura, H., Kato, K., Book, D., Sugimoto, S., Okada, M., & Homma, M. Enchancement of coercivity in high remanence HDDR Nd-Fe-B powders. United States. doi:10.1109/20.800496.
Nakamura, H., Kato, K., Book, D., Sugimoto, S., Okada, M., and Homma, M. Wed . "Enchancement of coercivity in high remanence HDDR Nd-Fe-B powders". United States. doi:10.1109/20.800496.
@article{osti_20000753,
title = {Enchancement of coercivity in high remanence HDDR Nd-Fe-B powders},
author = {Nakamura, H. and Kato, K. and Book, D. and Sugimoto, S. and Okada, M. and Homma, M.},
abstractNote = {A new type of HDDR (Hydrogenation, Disproportionation, Desorption, Recombination) processing route, in which alloys are heated up under a low pressure of H{sub 2} for the disproportionation stage, was found to be an effective way of obtaining high remanence Nd-Fe-B ternary powders, with no large decrease in coercivity (which was the problem with the previous HDDR processing route, in which the alloys were heated under vacuum). The alloys with 0.5% Ga addition exhibited high coercivities of 1.0 MAm{sup {minus}1} with no degradation in remanence (B{sub r} = 1.4 T).},
doi = {10.1109/20.800496},
journal = {IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)},
issn = {0018-9464},
number = 5Pt2,
volume = 35,
place = {United States},
year = {1999},
month = {9}
}