Boundary structure modification and magnetic properties enhancement of Nd–Fe–B sintered magnets by diffusing (PrDy)–Cu alloy
Boundary structure modification and magnetic properties enhancement of Nd–Fe–B sintered magnets by diffusing (PrDy)–Cu alloy
复制标题
DOI：
10.1016/j.scriptamat.2016.02.019
复制
发表时间：
2016-05
影响因子：
6
通讯作者：
Tan Minghui;X. Bao;Lu Kechao;S. Lu;Jiheng Li;Xuexu Gao
中科院分区：
文献类型：
--
作者：
Tan Minghui;X. Bao;Lu Kechao;S. Lu;Jiheng Li;Xuexu Gao
以Pr68Cu32、dy70cu30和pr35dy35cu30为直接扩散源，将晶界扩散过程应用于工业烧结钕铁硼磁体。Pr68Cu32的矫顽力由原磁体的1114.4 kA/m提高到1642.8 kA/m，高于Dy70Cu30的1402.7 kA/m。显微组织研究表明，pr68cu32对样品矫顽力的增强主要是由于连续的晶间层隔离了Nd2Fe14B晶粒。然而，dy70cu30对样品矫顽力的增强主要是由于Nd2Fe14B晶粒中广泛层的磁强化。
The grain boundary diffusion process was applied to the commercial sintered Nd–Fe–B magnets using Pr68Cu32, Dy70Cu30and Pr35Dy35Cu30ribbons as direct diffusion source. The coercivities increased from 1114.4 kA/m for the original magnet to 1642.8 kA/m for the processed magnet by Pr68Cu32, higher than 1402.7 kA/m by Dy70Cu30. Microstructural investigations showed that the evident coercivity enhancement for the sample by Pr68Cu32was mainly attributed to continuous intergranular layers isolating Nd2Fe14B grains. Nevertheless, the coercivity enhancement of the sample by Dy70Cu30was mainly resulted from the magnetic strengthening of the extensive layers in Nd2Fe14B grains.