Co元素及凝固速度对La-Fe-Si系NaZn13型相及磁性能影响

Influence of Co and Freezing Rate on NaZn13-type Phase Formation and Magnetic Property in La-Fe-Si Alloys

摘要:

采用熔体快淬法制备不同快淬速度的 La0.8Ce0.2(Fe11.5-xCox)Si1.5 (x=0、0.3、0.5、0.7) 合金条带，经过 1273 K 20 min 热处理，通过 X 射线衍射和磁性测量研究 Co 元素及凝固速度对La-Ce-Fe-Co-Si的相形成和磁性能的影响。结果表明：Co 元素添加和快淬速度提高均有利于 NaZn13 型相的形成；Co 元素添加提高合金居里温度，减小磁滞，但是磁热性能有所降低；快淬速度提高导致合金的磁滞增大，但对磁热性能影响较小。

Abstract:

La0.8Ce0.2(Fe11.5-xCox)Si1.5(x=0、0.3、0.5、0.7) ribbons were prepared by melt spinning. The phases and the magnetic property were characterized by X-ray diffraction and a vibrating sample magnetometer. The results show that Co and high quenched-speed help form the NaZn13-type phase. The substitution of Fe by Co can enhance the Curie temperature. The maximum magnetic entropy changes and the magnetic hysteresis decrease because of the substitution of Fe by Co. However, the magnetic hysteresis increases with quenched-speed rising. The quenched-speeds have little effect on maximum magnetic entropy changes and the Curie temperature.