Panda A K, Mohanta O, Ghosh M, Mitra A
National Metallurgical Laboratory, Jamshedpur 831007, India.
J Nanosci Nanotechnol. 2009 Sep;9(9):5600-3. doi: 10.1166/jnn.2009.1134.
The effect of substituting Fe by Co on the crystallization, structural and magnetic behaviour of Fe(72-x)Co(x)Si4B20Nb4 (X = 10, 20, 36, 50 at%) and Co36Fe36Si(4-Y)Al(y)B20Nb4 (Y = 0, 1 at%) alloys prepared in the form of melt spun ribbons has been discussed. Alloys containing optimum content of cobalt = 36 at% showed consistent coercivity at elevated temperatures. This soft magnetic property was further improved with aluminium incorporation. Transmission electron microscopy (TEM) indicated that such enhancement in the properties was due to finer dispersions of (CoFe)SiAl nanoparticles in amorphous matrix. Nanocrystallisation also raised the Curie temperature of the aluminium contained alloy.
研究了用钴替代铁对以熔体快淬带材形式制备的Fe(72-x)Co(x)Si4B20Nb4（X = 10、20、36、50 at%）和Co36Fe36Si(4-Y)Al(y)B20Nb4（Y = 0、1 at%）合金的结晶、结构和磁性能的影响。含钴最佳含量为36 at%的合金在高温下显示出一致的矫顽力。通过引入铝进一步改善了这种软磁性能。透射电子显微镜（TEM）表明，性能的这种提高归因于(CoFe)SiAl纳米颗粒在非晶基体中的更细分散。纳米晶化还提高了含铝合金的居里温度。
