锰、铝、锆对NdFeCoB合金HDDR磁粉性能的影响  

Effects of Manganese,Aluminium and Zirconium on Properties of NdFeCoB Powders Prepared by HDDR Process

作　　者：林培豪[1] 周秀娟[1] 付新涛[1] 

机构地区：[1]桂林电子科技大学信息材料科学与工程系,广西桂林541004

出　　处：《中国稀土学报》2008年第4期481-485,共5页Journal of the Chinese Society of Rare Earths

基　　金：广西自然科学基金项目(桂科自0310001)资助

摘　　要：采用HDDR技术制备NdFeCoB合金磁各向异性磁粉,研究了添加元素Mn,Al和Zr对NdFeCoB合金HDDR磁粉磁性能及磁各向异性的影响。结果发现:在NdFeCoB合金中加入2%Mn,可提高合金HDDR磁粉的磁各向异性和剩磁,但磁粉的矫顽力和最大磁能积降低;在NdFeCoB合金中,分别加入0.8%Al,0.1%Zr时,可使合金的HDDR磁粉的磁各向异性DOA值从0.23增加到0.5和0.41,但此时磁粉的矫顽力和最大磁能积较低;加入2%Mn,0.8%Al和0.1%Zr,没有改变NdFeCoB合金的相组成;添加Mn,Al,Zr使NdFeCoB合金HDDR磁粉磁各向异性增加,与这些元素的加入提高了硬磁相Nd2Fe14B在氢气中的稳定性有关。The magnetic anisotropic powders of NdFeCoB alloys were prepared by HDDR process. The effects of doping Mn, Al and Zr on the magnetic properties and anisotropy of the HDDR NdFeCoB magnetic powders were studied. The results indicated that adding 2%Mn to NdFeCoB alloy could improve the magnetic anisotropy and remanence of the alloy, but its Hcj and （BH）m decreased. When 0.8%Al or 0.1%Zr was added, the magnetic anisotropy DOA of the HDDR NdFeCoB magnetic powders increased from 0.23 to 0.5 or 0.41, but Hcj and （BH）m decreased. When 2%Mn, 0.8%Al or 0.1%Zr was added, the phase composition of the NdFeCoB alloy did not change. However, the magnetic anisotropy of the HDDR NdFeCoB magnetic powders increased with Mn, Al or Zr content increasing, which was related to the improvement of stability in hydrogen for the hard magnetic phase Nd2Fe14B due to these elements.

关 键 词：HDDR 磁粉 各向异性 稀土 

分 类 号：TG132.2[一般工业技术—材料科学与工程] TM271[金属学及工艺—合金]