Fracture toughness and magnetic properties of Sm2Co17-based magnets

摘要：

　　We present our findings of increased fracture toughness in high performance Sm2Co17-type magnet.The new Sm(Co0.65Fe0.24Cu008Zr0.03)7.6 magnet exhibits remanence of 11.13 kGs,maximum energy of 30.2 MGOe.This magnet shows not only a superhigh fracture toughness of 5.56 MPa m1/2 but also distinguished yielding combined with an enhanced plastic plateau of 30% to failure.It has been found that debonding,crack deflection,crack branching and bridging are the major toughening mechanisms for the observed high toughness and long yield plateau.Long and straight screw dislocations observed in Sm rich precipitates accelerate the debonding of Sm rich grains.

关键词： permanent magnets fracture toughness magnetic property toughening mechanism

作者: Aikun Li Liya Li Yuandong Peng Jianhong Yi

作者单位: State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China School of Materials Science and Engineering, Kunming University of Science and Technology,Kunming 65

会议类型: 国际会议

会议名称: 2013 International Conference on Intelligent System,Applied Materials and Control Technology(GSAMCT2013)(2013年智能系统、应用材料和控制技术国际会议)

会议地点: 太原

会议语种:英文

页码: 81-84

在线出版日期: 2013-01-13（万方平台首次上网日期，不代表论文的发表时间）