메뉴 건너뛰기
소속 기관 / 학교 인증
인증하면 논문, 학술자료 등을  무료로 열람할 수 있어요.
한국대학교, 누리자동차, 시립도서관 등 나의 기관을 확인해보세요
(국내 대학 90% 이상 구독 중)
고객센터 ENG
주제분류

논문 기본 정보

저자정보
출처
Wiley Advanced Science 10(16)
오류 신고하기
표지

검색

    초록·키워드

    The development of low-cost RE-Fe-B sintered magnets with large La/Ce content is of great significance for the balanced utilization of rare earth (RE) resources, but it is limited by reduced magnetic properties. In this work, the coercivity (H<sub>cj</sub> ), remanence (B<sub>r</sub> ), maximum energy product [(BH)<sub>max</sub> ], and temperature stability are simultaneously enhanced for magnets with LaCe accounting for 40 wt% of the total RE. The synergistic regulation of the REFe<sub>2</sub> phase, Ce-valence, and grain boundaries (GBs) in RE-Fe-B sintered magnets is realized for the first time by introducing appropriate La elements. The La elements inhibit the generation of the REFe<sub>2</sub> phase and tend to stay in the triple junctions, promoting the segregation of the RE/Cu/Ga elements and contributing to the formation of Ce/Nd/Cu/Ga-rich continuous thicker lamellar GBs, and as a result, weakening the detrimental effect on HA caused by La element substitution and enhancing H<sub>cj</sub> . In addition, partial La atoms entering the RE<sub>2</sub> Fe<sub>14</sub> B phase are beneficial for improving the B<sub>r</sub> and temperature stability of the magnets and promoting the Ce<sup>3+</sup> ion ratio, which also provides additional benefit for B<sub>r</sub> . The findings provide an effective and feasible way to co-enhance the remanence and coercivity of RE-Fe-B sintered magnets with high Ce content.

    본문·목차

    최근 본 자료 전체보기