添加元素Dy对Nd-Fe-B永磁合金性能的影响

来源期刊：中国有色金属学报1998年第3期

论文作者：潘树明

文章页码：459 - 462

关键词：Dy； Nd-Fe-B； 矫顽力

Key words：Dy； Nd-Fe-B； coercivity

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。

Abstract: 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 Dy₂O₃ being added, the above mentioned grain growing can be restrained, the amount of (Nd, Dy)₂Fe₁₄B 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 Nd₂Fe₁₄B matrix.