利用混合稀土制备稀土永磁体的工艺研究  

Technical Study of RE-Fe-B Magnet Preparation Using Mixture Rare Earth

作　　者：管立斌[1] 牛晋军[1] 郝思忠[1] 王建中[1] 马靳河[1] 安立军[1] 李巧燕[1] 

机构地区：[1]中国电子科技集团公司第三十三研究所,山西太原030006

出　　处：《中国材料进展》2009年第3期51-53,共3页Materials China

基　　金：太原市科技攻关项目(0703005)资助

摘　　要：用富含La,Se的混合稀土代替部分PrNd合金作为原料,按(NdPr)18.2(MM)13.6Fe66.22B1.08Cu0.2Al0.7(质量分数)进行配料,以甩带熔炼方式形成薄带状合金,合金经氢破碎后,用气流磨制成粉末,最后经压制、烧结得到一种廉价稀土永磁体。用磁性测量仪测量了样品的磁性能;用定氧仪考察了防氧化剂对粉体氧含量的影响,用SEM观察了烧结样品的组织形貌。该永磁体的剩余磁感应强度为1.16～1.2T,内禀矫顽力为960～1000kA/m,磁能积为248～264kJ/m3。该磁体性能与N33,N35钕铁硼磁体性能相当。Proportioned as （NdPr）18.2 （MM）13.6Fe66.22B1.08Cu0.2Al0.7 （mass fraction） , the stripcast alloy was made by melt spinning of the raw material, part of PrNd alloy in which was replaced with La and Se enriched misch metal. After hydrogen decrepitation, the alloy was jet milled into powder. Then a kind of inexpensive rare earth permanent magnet was obtained by powder shaping and sintering. The magnetic performance was measured using magnetic measuring instrument and the influence of antioxidant on oxygen content in powders was investigated with oxygen content measurement instrument. Mierostruetures of the sintered samples were observed by SEM. The results indicated that the residual magnetic flux density, the intrinsic coereivity and the magnetic energy product of the magnet were 1.16 - 1.2 T, 960 -1 000 kA/m and 248 - 264 kJ/m^3 respectively, equivalent to those of NdFeB magnet.

关 键 词：混合稀土 稀土永磁体 氢破碎 镨钕合金 

分 类 号：TM27[一般工业技术—材料科学与工程]