TWI509642B

A sintered magnet body (R a T 1 b M c B d ) coated with a powder mixture of an intermetallic compound (R 1 i M 1 j , R 1 x T 2 y M 1 z , R 1 i M 1 j H k ), alloy (M 1 d M 2 e ) or metal (M 1 ) powder and a rare earth (R 2 ) oxide is diffusion treated. The R 2 oxide is partially reduced during the di...

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Bibliographic Details
Main Authors MINOWA, TAKEHISA, NAGATA, HIROAKI, NOMURA, TADAO
Format Patent
LanguageChinese
Published 21.11.2015
Subjects
BASIC ELECTRIC ELEMENTS
CASTING
ELECTRICITY
INDUCTANCES
MAGNETS
MAKING METALLIC POWDER
MANUFACTURE OF ARTICLES FROM METALLIC POWDER
PERFORMING OPERATIONS
POWDER METALLURGY
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
TRANSPORTING
WORKING METALLIC POWDER
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Summary:A sintered magnet body (R a T 1 b M c B d ) coated with a powder mixture of an intermetallic compound (R 1 i M 1 j , R 1 x T 2 y M 1 z , R 1 i M 1 j H k ), alloy (M 1 d M 2 e ) or metal (M 1 ) powder and a rare earth (R 2 ) oxide is diffusion treated. The R 2 oxide is partially reduced during the diffusion treatment, so a significant amount of R 2 can be introduced near interfaces of primary phase grains within the magnet through the passages in the form of grain boundaries. The coercive force is increased while minimizing a decline of remanence.
Bibliography:Application Number: TW20121115593