Microstructure of Sm2Co17magnets and its influence on coercivity
来源期刊：中国有色金属学报(英文版)2004年第4期
论文作者：李丽娅 易健宏 黄伯云 彭元东 杜娟
文章页码：790 - 793
Key words：high temperature magnet; coercivity; cell structure; grooves
Abstract: Sm(CobalFe0.197Cu0.049Zr0.026)7.5 magnet with Hciof 2105 kA/m andβ18-200℃of -0.17%/℃was made by sintering processing. The magnet has uniform celluler structure. The cel, l interior is a rhombohedarl 2∶17 phase, and the boundary is a hexagonal 1∶5 phase. The average cell size is 93 nm and the cell boundary thickness is 20 nm. The cells are enriched in Fe, and the cell boundaries are enriched in Cu. More Cu-riched 1∶5 cell boundary phase would be helpful to obtain a higher coercivity and lower temperature coefficient. White secondary phase mainly consisting of Sm can decrease the coercivity of the magnets, but the closely paralleled grooves can increase coercivity.
