희토류 소결 자석, 희토류 소결 자석의 제조 방법, 회전자 및 회전기

희토류 소결 자석(1)은, 적어도 Nd를 희토류 원소 R로서 함유하는 R2Fe14B 결정 구조를 갖는 복수의 주상(2)과, 주상(2) 사이에 형성된 입계상(3)을 구비한다. 입계상(3)은, 결정성의 NdO상에 Sm이 치환되어 Sm이 농화된 Sm 농화부(4)와, Sm 농화부(4)의 외곽의 적어도 일부에 중희토류 원소 RH가 농화된 중희토류 원소 RH 농화부(5)를 갖는 입계상(3)을 갖는다. 이에 의해, 자기 특성의 저하를 억제하면서, 중희토류 원소 RH를 토류 소결 자석(1)의 보다 내부까지 확산시킬 수 있다. A rare eart...

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Hauptverfasser: IWASAKI AKITO, WATARAI AKIRA, YOSHIOKA YUKINA, TAMURA YOSHIO
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WATARAI AKIRA
YOSHIOKA YUKINA
TAMURA YOSHIO
description 희토류 소결 자석(1)은, 적어도 Nd를 희토류 원소 R로서 함유하는 R2Fe14B 결정 구조를 갖는 복수의 주상(2)과, 주상(2) 사이에 형성된 입계상(3)을 구비한다. 입계상(3)은, 결정성의 NdO상에 Sm이 치환되어 Sm이 농화된 Sm 농화부(4)와, Sm 농화부(4)의 외곽의 적어도 일부에 중희토류 원소 RH가 농화된 중희토류 원소 RH 농화부(5)를 갖는 입계상(3)을 갖는다. 이에 의해, 자기 특성의 저하를 억제하면서, 중희토류 원소 RH를 토류 소결 자석(1)의 보다 내부까지 확산시킬 수 있다. A rare earth sintered magnet includes a plurality of regions of a main phase each having an R2Fe14B crystal structure containing at least Nd as a rare earth element R and a grain boundary phase formed among the plurality of regions of the main phase. The grain boundary phase has Sm enriched portions in which Sm is enriched by Sm substitution in a crystalline NdO phase and heavy rare earth element RH enriched portions in which a heavy rare earth element RH is enriched at least on part of peripheries of the Sm enriched portions. This allows the heavy rare earth element RH to diffuse deeper into the rare earth sintered magnet while suppressing the deterioration of the magnetic properties.
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A rare earth sintered magnet includes a plurality of regions of a main phase each having an R2Fe14B crystal structure containing at least Nd as a rare earth element R and a grain boundary phase formed among the plurality of regions of the main phase. The grain boundary phase has Sm enriched portions in which Sm is enriched by Sm substitution in a crystalline NdO phase and heavy rare earth element RH enriched portions in which a heavy rare earth element RH is enriched at least on part of peripheries of the Sm enriched portions. 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A rare earth sintered magnet includes a plurality of regions of a main phase each having an R2Fe14B crystal structure containing at least Nd as a rare earth element R and a grain boundary phase formed among the plurality of regions of the main phase. The grain boundary phase has Sm enriched portions in which Sm is enriched by Sm substitution in a crystalline NdO phase and heavy rare earth element RH enriched portions in which a heavy rare earth element RH is enriched at least on part of peripheries of the Sm enriched portions. 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A rare earth sintered magnet includes a plurality of regions of a main phase each having an R2Fe14B crystal structure containing at least Nd as a rare earth element R and a grain boundary phase formed among the plurality of regions of the main phase. The grain boundary phase has Sm enriched portions in which Sm is enriched by Sm substitution in a crystalline NdO phase and heavy rare earth element RH enriched portions in which a heavy rare earth element RH is enriched at least on part of peripheries of the Sm enriched portions. This allows the heavy rare earth element RH to diffuse deeper into the rare earth sintered magnet while suppressing the deterioration of the magnetic properties.</abstract><oa>free_for_read</oa></addata></record>
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subjects ALLOYS
BASIC ELECTRIC ELEMENTS
CASTING
CHEMISTRY
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
DYNAMO-ELECTRIC MACHINES
ELECTRICITY
FERROUS OR NON-FERROUS ALLOYS
GENERATION
INDUCTANCES
MAGNETS
MAKING METALLIC POWDER
MANUFACTURE OF ARTICLES FROM METALLIC POWDER
METALLURGY
PERFORMING OPERATIONS
POWDER METALLURGY
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
TRANSPORTING
TREATMENT OF ALLOYS OR NON-FERROUS METALS
WORKING METALLIC POWDER
title 희토류 소결 자석, 희토류 소결 자석의 제조 방법, 회전자 및 회전기
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