Influence of SiC on Magnetic and Mechanical Properties of Hot-deformed Nd-Fe-B Magnets
High-speed motors need the Nd-Fe-B magnets with high strength as well as high magnetic properties.But Nd-Fe-B magnets are brittle and have lower strength,especially for the hot-deformed Nd-Fe-B magnets,which greatly limit its further application in dynamic conditions.To improve the strength of hot-deformed Nd-Fe-B magnets,SiC nanoparticles are used and SiC-doped Nd2Fe14B magnets have been fabricated by hot-pressing and hot-deformation process.The microstructure,bending strength and magnetic properties have been investigated systematically.Compared with the as-deformed Nd2Fe14B magnet,the SiC/Nd2Fe14B composite magnets revealed substantial enhancement in bending strength and the magnetic properties were affected little.The results indicate that up to 30%bending strength enhancement has been achieved in the SiC/Nd2Fe14B composite magnets with 0.5 wt.%SiC comparing with the pure Nd2Fe14B magnets.But when the amount of SiC is more than 0.5 wt.%,the bending strength started to decrease with the increase of SiC amount.We found that SiC nanoparticles were distributed in the intergranular boundary.The improvement of mechanical properties is attributed to the high strength of SiC and the strengthening mechanism is the crack deflection.
Nd-Fe-B magnet Magnetic property SiC Bending strength Microstructure
Zheng Liyun Fang Kan Zhang Meiling Jiang Ruijiao Zhu Minggang Li Wei
Division of Functional Materials,Central Iron & Steel Research Institute,76 Xueyuan South Road,Beiji School of Materials Science and Engineering,Hebei University of Engineering,199 Guangming South Stre Division of Functional Materials,Central Iron & Steel Research Institute,76 Xueyuan South Road,Beiji
国际会议
北京
英文
1390-1393
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）