本文测量了经不同温度和时间真空退火的非晶合金带Ｎｄ_ｘＢ_（２０－ｘ）Ｆｅ_（７８）Ｃｕ_（０．３）Ｃｏ_（１．７）（ｘ＝０．１，２，３，４，５），在１ｋＨｚ交流电下的磁化曲线，发现含少量Ｎｄ的非晶合金带在晶化温度附近真空退火后、起始导磁率减小，饱和场增大，使材料从软磁性向硬磁性转化；随着Ｎｄ含量的增加，这种转化重明显．Ｘ射线衍射透射电镜观察及电子衍射分析表明，材料在初期晶化时能析出颗粒大小为５－１００ｎｍ的针状纳米晶，且随着Ｎｄ含量增加，针状纳米晶的数量增多，这一现象与材料磁性测量的结果吻合．
The 1 kHz A.C.magnetic curves of Nd-xB_(20-x)Fe_(78)Cu_(0.3)Co_(1.7) amorphous alloys (x=0,1,2,3,4,5) melted spun ribbons specimens annealed at 430, 450,480 and 500℃ under vacuum for 0.5 or 1 h respectively were measured. With a minor Nd content the initial permeabilities of the amorphous alloys ribbons annealed near the crystallization temperature under vacuum decrease and the saturation magnetic fields increase. The materials may change from soft into hard magnetism and it is more remarkable with increasing of Nd content. Observations under X-ray or electron diffraction and TEM revealed that the nanocrystallites in size of 5-100 nm may precipitate in needle-shape and the more the Nd contains the more the quantity of them may be. These are in agreement with the results measured. Furthermore.a discussion was also made.
参考文献
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| [4] | ShenBaogen,ZhangJunxian,YangLinyuan．WoFeng．NingTaishan,JiSongquan,ZhaoJiangao,GuoHuiqun,ZhanWenshan．JMagnMagnMater,1990 |
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