Y取代量对双主相Nd-Y-Fe-B磁体性能与微观组织的影响  

The effect of Y substitution for double main phase Nd-Y-Fe-B magnet properties and microstructure

作　　者：钟淑伟 杜君峰 庞再升 戚植奇 喻玺 王亮亮 刘滨 许才龙 钟康 钟长传 蔡小勇 剧智华 杨牧南 ZHONG Shu-wei DU Jun-feng PANG Zai-sheng QI Zhi-qi YU Xi WANG Liang-liang LIU Bin XU Cai-long ZHONG Kang ZHONG Chang-chuan CAI Xiao-yonga JU Zhi-hua YANG Mu-nan(Department Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, J iangxi, China Jiangxi Rare-earth Magnet Material and Device Engineering Research Center, Ganzhou 341000, Jiangxi,China Fortune Electronics Incorporated Company, Ganzhou 341000, Jiangxi,China)

机构地区：[1]江西理工大学材料科学与工程学院,江西赣州341000 [2]江西省稀土永磁材料及器件工程研究中心,江西赣州341000 [3]赣州富尔特电子股份有限公司,江西赣州341000

出　　处：《金属功能材料》2017年第5期32-37,共6页Metallic Functional Materials

基　　金：江西省科技厅重点研发计划资助(2016BBH80010)

摘　　要：采用双主相法制备低成本Nd-Y-Fe-B烧结磁体,研究高丰度稀土Y的取代量对磁体的相组成、致密性、微观组织、磁性能以及力学性能的影响。结果表明:少量的Y取代不会造成磁体磁性能的明显下降,在Y的质量分数取代量为10%时,磁体剩磁、矫顽力和磁能积仍保持在1.32T、955.25kA/m和336.3kJ/m3,其硬度也较高,切削性能良好。随Y取代量进一步提升,在磁体内部析出Y和O含量较高新型稀土相,磁体内部孔洞缺陷数量增多,磁性能大幅降低,硬度和切削性能也明显下降。Low cost Nd-Y-Fe-B sintered magnets were prepared by double main phase method,and the effects of high abundance rare earth Y with different substitution quantity on the phase composition,density,microstructure,magnetic properties and mechanical property of the magnets were investigated.The result shows that a small number of Y substituting does not result in a significant decrease in magnetic properties.The remanence,coercivity,and magnetic energy product of the magnet keep in 1.32 T、955.25 kA/m and 336.3 kJ/m3 when the Y substitution content is 10%（mass fraction）,and the hardness and cutting performance are also excellent.However,it is further in-crease amount of Y substitution,which make new RE-rich phase high content in Y and O,the number of hole detects also increase.Magnetic properties,hardness,and cutting performance are greatly reduced.

关 键 词：双主相 Nd-Y-Fe-B 磁性能 显微组织 

分 类 号：TM273[一般工业技术—材料科学与工程]