扩散基体及工艺对烧结钕铁硼晶界扩散效果的影响  

Influence of Magnet and Diffusion Process on Diffusion Effect of Sintered NdFeB with Grain Boundary Diffusion

作　　者：廖宗博 Liao Zongbo(Xiamen Tungsten Co.,LTD.,Xiamen 361009,Fujian)

机构地区：[1]厦门钨业股份有限公司,福建厦门361009

出　　处：《福建冶金》2022年第3期24-27,共4页Fujian Metallurgy

摘　　要：扩散工艺应用于烧结钕铁硼磁体的开发,可提高矫顽力、开发高性能磁体。实际的研发和生产中,在获得更高综合性能的产品时存在较多的瓶颈和问题。本文研究了毛坯基体对扩散效果的影响,其中富钕相的体积占比与最终扩散性能直接相关,较高的富钕相占比能够获得更好的扩散效果。同时结合了理论计算,研究了扩散工艺时间对扩散后性能的影响,随着扩散时间的延长,扩散效果的提升具有一定的上限,可根据实际需求选择更具性价比的扩散工艺。The diffusion process is applied to the development of sintered NdFeB magnets,which can improve the coercivity and develop high-performance magnets.In practical research and production,there are many problems in obtaining products with higher comprehensive performance.This paper studies the influence of the magnets on the diffusion effect.The volume ratio of the Nd-rich phase is directly related to the properties after diffusion process.Higher proportion of neodymiumrich phase can achieve better properties.At the same time,combined with theoretical calculations,the effect of diffusion time was studied.With the extension of the diffusion time,the improvement of the diffusion effect has a certain upper limit,and a more cost-effective diffusion process can be selected according to the needs.

关 键 词：烧结钕铁硼 晶界扩散 矫顽力 毛坯 扩散时间 

分 类 号：TM273[一般工业技术—材料科学与工程]