ANISOTROPIC RARE-EARTH SINTERED MAGNET AND METHOD FOR PRODUCING SAME

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United States of America Patent

APP PUB NO 20230144451A1
SERIAL NO

17906446

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Abstract

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An anisotropic rare earth sintered magnet represented by the formula (R1-aZra)x(Fe1-b COb)100-x-y(M11-cM2c)y where R is at least one element selected from rare earth elements and Sm is essential; M1 is at least one of V, Cr, Mn, Ni, Cu, Zn, Ga, Al, and Si; M2 is at least one of Ti, Nb, Mo, Hf, Ta, and W; and x, y, a, b, and c each satisfy certain conditions. The anisotropic rare earth sintered magnet includes 80% by volume or more of a main phase composed of a compound of a ThMn12 type crystal, the main phase having an average crystal grain size of 1 μm or more, and containing an R-rich phase and an R(Fe,Co)2 phase in a grain boundary portion. A method for producing the anisotropic rare earth sintered magnet is also described.

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Patent Owner(s)

Patent OwnerAddress
SHIN-ETSU CHEMICAL CO LTD4-1 MARUNOUCHI 1-CHOME CHIYODA-KU TOKYO 100-0005

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
KAMATA, Masayuki Tsuruga-shi, JP 12 35
NOMURA, Tadao Fukui-shi, JP 30 239
OTSUKA, Kazuki Echizen-shi, JP 16 26

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