热变形Nd-Fe-B磁体Pr_(68)Cu_(32)合金的晶界扩散研究  

Grain Boundary Diffusion Process of Pr_(68)Cu_(32) Alloy for Hot-Deformed Nd-Fe-B Magnet

作　　者：汪洋 黄有林[2] Wang Yang;Huang Youlin(Hefei Technology College,Hefei 230012,China;Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]合肥职业技术学院,安徽合肥230012 [2]南昌航空大学,江西南昌330063

出　　处：《湖北汽车工业学院学报》2025年第1期68-71,共4页Journal of Hubei University Of Automotive Technology

基　　金：安徽省高校重点科研项目(2022AH052242);合肥职业技术学院自然科学研究资助项目(2024KJA02)。

摘　　要：以低熔点Pr_(68)Cu_(32)合金薄带为扩散剂,研究了晶界扩散对热变形Nd-Fe-B磁体磁性能的影响,对其矫顽力机制进行了分析。结果表明:热变形Nd-Fe-B磁体与Pr_(68)Cu_(32)合金条带在500℃下扩散1 h,可获得最佳综合磁性能,磁体的矫顽力、剩磁和磁能积分别为1336 kA·m^(-1)、1.26 T、286 kJ·m^(-3);580℃下扩散3 h后,可获得最高矫顽力1746 kA·m^(-1),较原始磁体增幅80%;晶界扩散后,磁体温度稳定性得到改善,矫顽力机制认为是钉扎机制。The Pr_(68)Cu_(32) alloy ribbons with low melting points were prepared,and the influence of the grain boundary diffusion process(GBDP) on the properties of hot-deformed Nd-Fe-B magnet was investigated.The coercivity mechanism was analyzed.The experimental results show that optimum properties of the magnet can be achieved when the hot-deformed Nd-Fe-B magnet and Pr_(68)Cu_(32) alloy ribbons are diffused at 500 ℃ for 1 h.The coercivity,remanence,and magnetic energy product of the magnet are 1336 kA·m~(-1),1.26 T,and 286 kJ·m~(-3).The maximum coercivity of 1746 kA·m~(-1) can be achieved after diffusion at 580 ℃ for 3 h,an increase of 80% compared with the original coercivity of the magnet.After GBDP,the temperature stability of the magnet is improved,and the coercivity mechanism is considered to be the pinning mechanism.

关 键 词：晶界扩散 热变形Nd-Fe-B 磁性能 

分 类 号：TM273[一般工业技术—材料科学与工程]