Microstructure and magnetic properties of hot-pressed and hot-deformed composite magnets produced by spark plasma sintering method
Bulk isotropic and anisotropic Nd13.5Fe80.4Ga0.5B5.6 and Nd13.5Fe80.4Ga0.5B5.6/Fe magnets were synthesized by applying spark plasma sintering (SPS) technique. The effect of hot-pressing temperature on the magnetic properties of hot-pressed (HP) and hot-deformed (HD) magnets without additive and with 5％ Fe addition was investigated. With increasing sintering temperature for HP magnets, the grain grew gradually. For HD magnets, the optimal magnetic properties could be obtained at hot-pressing temperature 680℃ due to the development of desired c-axis texture and uniform microstructure, which resulted from the appropriate and uniform grain size in HP magnets. Fe addition could enhance remanence (Br) and magnetic energy products ((BH)m) of HP and HD magnets. However, the maximum magnetic energy product of HD magnets decreased when hot-pressing temperature was higher than 650℃.
Composite magnets hot deformation magnetic properties microstructure
Ma Yilong Chen Dengming Shen Qian Cao Pengjun
College of Metallurgical and Materials Engineering, Chongqing University of Science andtechnology, C College of Materials Science and Engineering, Chongqing University of Technology, Chongqing400054, C College of Metallurgical and Materials Engineering, Chongqing University of Science and technology,
国际会议
11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)
青岛
英文
740-744
2010-09-25（万方平台首次上网日期，不代表论文的发表时间）