(北京有色金屬研究總院，北京 100088;
湛江順昌高新材料有限公司， 湛江 524022)
摘要: 由于氫化制粉制備的Nd-Fe-B粉末制品燒結(jié)時(shí)磁體中的晶粒異常長(zhǎng)大，使合金的矯頑力降低。通過在Nd-Fe-B合金中加入少量Dy2O3，能有效地抑制合金高溫?zé)Y(jié)時(shí)的晶粒長(zhǎng)大，增加了各向異性很高的(Nd, Dy)2Fe14B相，從而使合金的矯頑力得到提高，當(dāng)Dy的加入量超過(摩爾分?jǐn)?shù))4%時(shí)，Dy在富Nd相晶界中分布比在基體相Nd2Fe14B中高。)
摘 要: 由于氫化制粉制備的Nd-Fe-B粉末制品燒結(jié)時(shí)磁體中的晶粒異常長(zhǎng)大，使合金的矯頑力降低。通過在Nd-Fe-B合金中加入少量Dy2O3，能有效地抑制合金高溫?zé)Y(jié)時(shí)的晶粒長(zhǎng)大，增加了各向異性很高的(Nd, Dy)2Fe14B相，從而使合金的矯頑力得到提高，當(dāng)Dy的加入量超過(摩爾分?jǐn)?shù))4%時(shí)，Dy在富Nd相晶界中分布比在基體相Nd2Fe14B中高。
關(guān)鍵字: 關(guān)鍵詞: Dy Nd-Fe-B 矯頑力
（General Research Institute for Nonferrous Metals,Beijing 100088, P. R. China;
Shunchang Hitech Materials Corporation Limited,Zhanjiang 524022, P. R. China）
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.
Key words: Dy Nd-Fe-B coercivity
