Effect Of DyMn Alloy-Powder Addition On Microstructure And Magnetic Properties Of NdFeB Sintered Magnets

Archives of Metallurgy and Materials

T.S. Jang¹  D.R. Dhakal²  M.-W. Lee²  S.R. Lee³  T.H. Kim³  H.J. Kim⁴ 

[1] D CENTER OF JAHWA ELECTRONICS CO. LTD, CHEONGWON 363-922, KOREA;DEPT. OF ADVANCED MATERIAL ENGINEERING, SUNMOON UNIVERSITY, ASAN, CHUNGNAM 336-708, KOREA;DEPT. OF MATERIALS SCIENCE AND ENGINEERING, KOREA UNIVERSITY, SEOUL 136-713, KOREA;R&

关键词: Keywords: NdFeB sintered magnets;    DyMn-alloy powder;    Coercivity;    Low melting point element;   

DOI  :  10.1515/amm-2015-0142

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

Micostructural change and corresponding effect on coercivity of a NdFeB sintered magnet mixed with small amount of DyMn powder was investigated. In the sintered magnet mixed with the DyMn alloy-powder Dy-rich shell was formed at outer layer of the main grains, while Mn was mostly concentrated at Nd-rich triple junction phase (TJP), lowering melting temperature of the Nd-rich phase that eventually improved the microstructural characteristics of the gain boundary phase. The coercivity of a magnet increased more than 3.5 kOe by the mixing of the DyMn alloy-powder.

【 授权许可】

Unknown