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Title: New sintered high-temperature Sm-Co based permanent magnet materials

Abstract

New sintered Sm-Co based permanent magnet materials have been developed to meet the high-temperature ({ge}400 C) application requirement of advanced power systems. A magnet of Sm(Co{sub bal}Fe{sub 0.09}Cu{sub 0.09}Zr{sub 0.03}){sub 7.69} shows an intrinsic coercivity ({sub M}H{sub c}) approaching 13 kOe and an energy product of 14 MGOe at 400 C. Its second-quadrant induction demagnetization curve is a straight line at temperatures to 500 C. Magnets with improved temperature coefficient of {sub M}H{sub c} have been obtained by reducing the Fe content and increasing the Sm content. An abnormal and complex temperature dependence of {sub M}H{sub c} was observed in sintered Sm(Co{sub bal}Fe{sub 0.04}Cu{sub 0.09}Zr{sub 0.02}){sub 7.26}. Upon heating, the {sub M}H{sub c} first reached a minimum of 4.4 kOe at 150 C and then gradually increased to a maximum of 7.5 kOe at 500 C.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Univ. of Dayton Magnetics Lab., OH (US)
OSTI Identifier:
20000764
Alternate Identifier(s):
OSTI ID: 20000764
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; SAMARIUM ALLOYS; COBALT ALLOYS; IRON ALLOYS; COPPER ALLOYS; ZIRCONIUM ALLOYS; COERCIVE FORCE; MAGNETIC PROPERTIES; TEMPERATURE DEPENDENCE; PERMANENT MAGNETS

Citation Formats

Liu, S., Yang, J., Doyle, G., Kuhl, G.E., Chen, C., Walmer, M., and Simon, G. New sintered high-temperature Sm-Co based permanent magnet materials. United States: N. p., 1999. Web.
Liu, S., Yang, J., Doyle, G., Kuhl, G.E., Chen, C., Walmer, M., & Simon, G. New sintered high-temperature Sm-Co based permanent magnet materials. United States.
Liu, S., Yang, J., Doyle, G., Kuhl, G.E., Chen, C., Walmer, M., and Simon, G. Wed . "New sintered high-temperature Sm-Co based permanent magnet materials". United States.
@article{osti_20000764,
title = {New sintered high-temperature Sm-Co based permanent magnet materials},
author = {Liu, S. and Yang, J. and Doyle, G. and Kuhl, G.E. and Chen, C. and Walmer, M. and Simon, G.},
abstractNote = {New sintered Sm-Co based permanent magnet materials have been developed to meet the high-temperature ({ge}400 C) application requirement of advanced power systems. A magnet of Sm(Co{sub bal}Fe{sub 0.09}Cu{sub 0.09}Zr{sub 0.03}){sub 7.69} shows an intrinsic coercivity ({sub M}H{sub c}) approaching 13 kOe and an energy product of 14 MGOe at 400 C. Its second-quadrant induction demagnetization curve is a straight line at temperatures to 500 C. Magnets with improved temperature coefficient of {sub M}H{sub c} have been obtained by reducing the Fe content and increasing the Sm content. An abnormal and complex temperature dependence of {sub M}H{sub c} was observed in sintered Sm(Co{sub bal}Fe{sub 0.04}Cu{sub 0.09}Zr{sub 0.02}){sub 7.26}. Upon heating, the {sub M}H{sub c} first reached a minimum of 4.4 kOe at 150 C and then gradually increased to a maximum of 7.5 kOe at 500 C.},
doi = {},
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}
}