添加元素Dy对Nd-Fe-B永磁合金性能的影响  

INFLUENCES OF Dy ADDITION ON PROPERTIES OF Nd Fe B PERMANENT MAGNET ALLOY

作　　者：潘树明[1,2] 

机构地区：[1]北京有色金属研究总院 [2]湛江顺昌高新材料有限公司

出　　处：《中国有色金属学报》1998年第3期459-462,共4页The Chinese Journal of Nonferrous Metals

基　　金：中国科学院磁学国家重点实验室资助项目

摘　　要：由于氢化制粉制备的ＮｄＦｅＢ粉末制品烧结时磁体中的晶粒异常长大，使合金的矫顽力降低。通过在ＮｄＦｅＢ合金中加入少量Ｄｙ２Ｏ３，能有效地抑制合金高温烧结时的晶粒长大，增加了各向异性很高的（Ｎｄ，Ｄｙ）２Ｆｅ１４Ｂ相，从而使合金的矫顽力得到提高，当Ｄｙ的加入量超过（摩尔分数）４％时，Ｄｙ在富Ｎｄ相晶界中分布比在基体相Ｎｄ２Ｆｅ１４Ｂ中高。It was found that the grains in Nd Fe B prepared with hydrogenated powder abnormally grow up when sintering, which makes the coercivity drop. After a little Dy 2O 3 being added, the above mentioned grain growing can be restrained, the amount of (Nd, Dy) 2Fe 14 B phases with high anisotropy and the coercivity of the alloy increase. When the addition of Dy is over (mole fraction) 4%, the spread degree of Dy at the grain boundary is higher than that in the Nd 2Fe 14 B matrix.

关 键 词：ND-FE-B 矫顽力 永磁合金 氢化制粉 镝 

分 类 号：TG132.27[一般工业技术—材料科学与工程]