Y.F. Gao
,
J.Tan
,
G.D. Liu
,
C.L.Zhang
,
T.Liuand R.Z Ma (Rapidly Quenched Materials Research and Development Centre
,
Central Iron & Steel Research Institute
,
Beijing 100081
,
China)(Metal Physics Department
,
University of Science and Technology Beijing
,
Beijing 100083
,
China)
金属学报(英文版)
A mostly single bcc phase with grain sizes of 15-20 nm was prepared by crystallization of amorphous Fe-P-C-Mo-Cu-Si alloys.The Bs value (H=10000 Oe) reaches 1.595 T for Fe(79.5) P(12)C6Cu(0.5)Mo(0.5)Si(1.5) alloys. The low core loss of 0.14 w/kg at 1.3 T and 50 Hz was confirmed for the bcc Fe(79.5)P(12)C6Cu(0.5)Mo(0.5)Si(1.5) alloy.The structures of the alloy annealed at different temperatures have been investigated by means of Xray diffraction and transmission electron microscope. The relationship between the structure and magnetic properties of the alloy is discussed.
关键词:
: amorphous alloy
,
null
,
null
何正明
,
卢国荣
,
苏昉
,
文峰
,
沈保根
金属学报
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.
关键词:
非晶合金
,
rapidly quenched permanent magnet
,
nanocrystallite