HDDR工艺对各向异性NdFeB性能的影响  

Influences of HDDR Process on the Magnetic Properties of Anisotropic NdFeB Powders

作　　者：林培豪[1] 任静[1] 职利[1] 王仲民[1] 

机构地区：[1]桂林电子工业学院材料科学与工程研究中心,广西桂林541004

出　　处：《桂林电子工业学院学报》2003年第5期57-60,共4页Journal of Guilin Institute of Electronic Technology

基　　金：广西自然科学基金项目(桂科自0310001)

摘　　要：HDDR工艺是在吸氢、歧化、脱氢、再复合过程中,将NdFeB磁粉的晶粒细化和转变成具有磁各向异性特性,通过控制吸氢、歧化、脱氢、再复合工艺的氢气压、温度、时间,得到高磁性能的各向异性NdFeB磁粉。该工艺在目前作为有效制备用做粘结磁体各向异性NdFeB磁粉的新方法倍受重视。但由于歧化再复合过程中氢气含量和热能的变化,给稳定制粉工艺带来很大困难,这是今后进一步研究开发高性能HDDR各向异性NdFeB磁粉首先要解决的问题。HDDR process is paid more attention to as a new way to prepare the anisotropic NdFeB powders which can be used to produce bonded magnets. This technology can finegrain the particles of the NdFeB powders and make them have the properties of anisotropy during the process of HydrogenationDisproportionation and DesorptionRecombination.By controlling the hydrogen pressure, temperature, time of HydrogenationDisproportionation and DesorptionRecombination the excellent magnetic properties of anisotropic NdFeB powders are prepared. But due to the change of the hydrogen contents and the heat energy in the course of Disproportionation and Recombination, there is a great difficulty to stabilize the process of preparing powders. This is the first problem which should be solved when we research and exploit the perfect magnetic properties of anisotropic NdFeB powders in future.

关 键 词：HDDR 各向异性 NDFEB 吸氢 歧化 脱氢 再复合工艺 

分 类 号：TG132.272[一般工业技术—材料科学与工程]