摘要
NdFeB磁体是当今应用最为广泛的永磁材料之一,但对于烧结NdFeB永磁体而言,当工作温度升高时,磁体中Nd和Fe的强化学活性极易引起磁体不同程度的变形和粉化,因此,烧结NdFeB永磁体虽然具有极高的磁性能,却只能在100℃以下工作,这严重影响了它的应用和发展。本文对比了当今各种提高NdFeB永磁体抗氧化性方法,权衡其利弊,提出将热浸镀铝技术应用于烧结NdFeB永磁体的防护。实验证明,在烧结NdFeB永磁体表面热浸镀铝,镀层与基体之间可形成良好的冶金结合,从本质上提高了镀层的结合强度;同时,铝镀层在氧化环境中不但能够起到阳极保护作用,还可形成钝化膜,从而实现对基体的双重保护。
The NdFeB magnet is one of the mast important magnets at present kecause of its superior magnetic property But due to the chemical activitry of Nd and Fe,any operating temperature above 100℃ mill induce severe deformation,oxidetion and pulverization,which seriously restrictsits development.This artide analyses the advantages and disadvantages of different present solutions for improving the oxidation resistance of NdFeB magnets,and puts formard a method of hot dipping NdFeB magnets mith aluminum coating.Exp...
出处
《粉末冶金工业》
CAS
北大核心
2008年第6期23-26,共4页
Powder Metallurgy Industry
关键词
热浸镀
NDFEB
镀铝
抗氧化
hot dip coating
NdFeB
aluminium coating
oxidation resistance
