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

• Main Authors: IWASAKI AKITO, KITANO TATSUYA, NAKAMURA YASUTAKA
• Format: Patent
• Language: Korean
• Published: 05.03.2024
• Subjects: ALLOYS; BASIC ELECTRIC ELEMENTS; CASTING; CHEMISTRY; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; INDUCTANCES; MAGNETS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; PERFORMING OPERATIONS; POWDER METALLURGY; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WORKING METALLIC POWDER

본 개시는, 원소 M은 Cu, Al 및 Ga의 군으로부터 선택되는 1종 이상의 원소로 하고, 일반식 (Nd, La, Sm)-Fe-B-M을 만족시키는 희토류 소결 자석(1)으로서, R2Fe14B 결정 구조를 기본으로 하는 결정립을 포함하는 주상(10)과, (Nd, La, Sm)-O로 표시되는 산화물상을 주성분으로 하는 결정성의 제 1 부상(21)과, (Nd, La)-O로 표시되는 산화물상을 주성분으로 하는 결정성의 제 2 부상(22)을 갖는다. Sm의 농도는, 제 2 부상(22)에 비해서 제 1 부상(21) 쪽이 높고, 원소 M의 농도는, 제 1 부상(21)에 비해서 제 2 부상(22) 쪽이 높다. The present disclosure provides a rare earth sintered magnet satisfying the general formula (Nd, La, Sm)-Fe-B-M, where the element M is one or more elements selected from the group consisting of Cu, Al, and Ga, the rare earth sintered magnet including: a main phase including crystal grains based on an R2Fe14B crystal structure; a first subphase that is crystalline and mainly composed of an oxide phase represented by (Nd, La, Sm)-O; and a second subphase that is crystalline and mainly composed of an oxide phase represented by (Nd, La)-O. The concentration of Sm is higher in the first subphase than in the second subphase, and the concentration of the element M is higher in the second subphase than in the first subphase.