添加Sn对Nd_2Fe_(14)B/α-Fe纳米复合永磁材料结构和磁性能的影响  

Effects of Sn on Microstructure and Magnetic Properties of Nd_2Fe_(14)B/α-Fe Nanocomposite Magnets

作　　者：王占勇[1] 刘文庆[2] 周邦新[2] 倪建森[2] 徐晖[2] 

机构地区：[1]上海应用技术学院材料工程系,上海200235 [2]上海大学材料所,上海200072

出　　处：《金属功能材料》2010年第2期1-4,15,共5页Metallic Functional Materials

基　　金：上海市教委基金(06OZ015);上海市重点学科建设资助项目(P1502);国家"863"高技术研究发展计划(2002AA302602-2);上海市科学技术发展基金纳米专项(0552nm049);新金属材料国家重点实验室开放基金资助

摘　　要：在Nd10Fe84B6添加0.5 at%Sn元素,合金晶化后Sn富集于富Nd相,富Nd相的生成使得合金中α-Fe相的相对含量增加,合金的剩余磁化强度,矫顽力和剩磁比有所改善。而在Nd9.5Fe75.5Co5Zr3.5B6.5合金中添加1 at%Sn元素后,虽然晶化后合金的晶粒变细小,α-Fe相的相对含量也有所增加,然而由于过多的富Nd相、富B相和富Zr相等软磁性相或非磁性相的存在,使得合金的剩余磁化强度和磁滞回线的方形度降低,进而降低了合金的综合磁性能。With the addition of 0.5 at% Sn for Nd10Fe84B6 alloys,Nd-enriched phase,regionally precipitating Sn atoms,is formed after crystallization.The formation of Nd-enriched phase induces the increase of content ratio of α-Fe phase,and the remanence,coercivity and remanence ratio are improved slightly.Although the grain size is refined and the content ratio of α-Fe phase is increased for complex Nd9.5Fe74.5Co5Zr3.5B6.5Sn1 alloy,the addition of Sn element reduces the remanence and squareness of hysteresis loop because of the excess formation of soft-magnetic phases and non-magnetic phases,such as Nd-enriched phase,B-enriched phase and Zr-enriched phase.

关 键 词：ND2FE14B/Α-FE 纳米复合永磁材料 磁性能 三维原子探针 SN 

分 类 号：TM273[一般工业技术—材料科学与工程]