微观组织调整和稀土含量对烧结NdFeB永磁腐蚀的影响_衣晓飞.pdfVIP

16 5 V o l116, N o1 5 20 10 10 JOURNA L O F FUNCT IONA L M ATER IALS AND DEV ICES O ct., 2010 : 1007 - 4252 20 10) 05- 0502- 05 NdFeB 1 2 2 2 衣晓飞 , 刘卫强, 岳明, 张东涛 1. 安徽大地熊新材料股份有限公司, 安徽 231500; 2. 北京工业大学材料学院, 北京 100124) : 用放电等离子烧结技术 SPS)制备了不同稀土含量的新型烧结N dFeB 磁体, 为了对比, 用传统烧结工艺制备了相同成分的磁体测量了磁体在高压湿热环境的腐蚀行为结果表明SPS 磁体的耐腐蚀性明显优于传统烧结磁体, 而且随着稀土含量的降低, 烧结N dFeB 磁体的耐腐蚀性 能显著提高 : 放电等离子烧结; 烧结N dF eB 永磁; 高压加速腐蚀; 微观组织调整 : TG 178 : A Corro sion behavio r of sin tered N dFeB perm an en tm agn et w ith m odif ied m icro structu re and d ifferen t ra re earth con ten t 1 2 2 Y I X iao-fe i, L IU W e-i qiang-2, YUE M ing , ZHANG Dong- tao 1. A nhu i Earth - panda A dvance M agnet icM aterial co. L td, A nhu i 231500, China; 2. Co llege ofM aterials Science and Eng ineering, Be ijing University of T echno logy, Beijing 100124, China) Abs tract: S intered N dF eB m agnetsw ith different rare earth content w ere prepared by Spark P lasm a S inte- ring techn ique. M agnets w ith sam e com posit ion w ere produced u sing conventional sintering m ethod for com par ison. The corrosion behav ior o f the m agnets in the autoc lave were investigated. Com pared w ith conventional sintered N dF eB m agnets, the SPS m agnets process better corrosion resistance. T he sintered N dF eB m agnets exhib it exce llen t corrosion resistance w ith the reduction o f rare earth content. K ey words: Spark p lasm a sintering SPS); Sintered N dF eB perm anent m agnet; A utoc lave test; M od ified m icrostructure