矫顽力
材料科学
钕磁铁
磁铁
钎焊
冶金
复合材料
晶界
烧结
填充金属
合金
微观结构
凝聚态物理
焊接
机械工程
物理
工程类
电弧焊
作者
Wentao Xv,Shaofeng Wang,Liping Cai,Xinyang Zhang,Zhanguo Dou,Wei Luo
标识
DOI:10.1016/j.scriptamat.2022.114971
摘要
This article presents an application of vacuum brazing to join sintered NdFeB permanent magnet N33UH with high coercivity. The magnets were effectively brazed with BCu91AgP Cu-based brazing filler metal at 680°C. The shear strength of the joint was up to 113.19 MPa. Meanwhile, the principal magnetic properties decreased. Subsequently heat treatment for 3 hours at 460-550°C could notably improve magnetic properties. This increase in magnetic properties was mainly attributed to the formation of continuous thin Nd-rich grain boundary phases between the main phases. Heat treated at 520°C, Br, HcB, HcJ, and (BH)max reached 95.4%, 95.9%, 99.8% and 91.4% of as-received magnet, respectively.
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