Magnetic properties and structures of Y-substituted Nd-Y-Fe-B melt-spun ribbons  

作　　者：Meng Zheng Yi-Kun Fang Li-Wei Song Rui Han Ming-Gang Zhu Wei Li 

机构地区：[1]Division of Functional Materials,Central Iron and Steel Research Institute,Beijing,100081,China

出　　处：《Rare Metals》2023年第5期1712-1717,共6页稀有金属（英文版）

基　　金：financially supported by the National Basic Research Program of China (No.2014CB643701);the National Natural Science Foundation of China (Nos.51371054 ,51331003);the National Key Research and Development Program of China (No.2016YFB0700903)。

摘　　要：The nanocrystalline magnetic ribbons of(Nd_(1-x)Y_(x))_(14.5)Fe_(ba1)B(6)Co_(0.2)Al_(1)Cu_(0.15)(x=0,0.1,0.2,0.3,0.4) were prepared by melt-spinning technique.The magnetic properties and microstructures were systematically investigated for the ribbons.It is found that Y substituting Nd in the R_(2)Fe_(14)B main phase grains gives rise to the decrease in the crystal lattice constant.When Y content increases from x=0 to x=0.4,the remanence and intrinsic coercivity(H_(cj)) decrease from 0.80 to 0.71 T and1400 to 809 kA·m^(-)1,respectively,with the corresponding descent rate of 11.5% and 42.5%.It is impressed that the average grain size increases with Y content increasing.And the strong intergrain exchange coupling interactions exist in all the ribbons and could be enhanced with an appropriate Y substitution,such as x=0.4.Moreover,magnetization reversal mechanism is confirmed to be pinning type for the ribbons.The results provide valuable reference to the fabrication of Y-substituted Nd-Y-Fe-B sintered magnets.

关 键 词：Melt-spun ribbons Y substitution Intergrain exchange coupling Microstructure 

分 类 号：TM273[一般工业技术—材料科学与工程]