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采用单辊快淬法制备Fe77Co4Zr9B10非晶合金,在不同温度下对该合金进行热处理。利用差热分析仪(DTA)、X射线衍射仪(XRD)、原子力显微镜(AFM)以及振动样品磁强计(VSM)等手段对Fe77Co4Zr9B10合金薄带的晶化行为、微观结构和磁性能进行研究。结果表明:Fe77Co4Zr9B10非晶合金的晶化峰值温度Tp的晶化激活能Ep为525.19 k J/mol。Fe77Co4Zr9B10非晶合金在晶化初期,观察到α-Fe和α-Mn型晶化物析出;943 K退火,α-Mn型晶化物消失。Fe77Co4Zr9B10合金在晶化初期,α-Mn型晶化物的析出导致矫顽力(Hc)恶化;在943K退火后,Hc的下降与α-Mn型晶化物的消失和α-Fe相体积分数的增加有关。
The Fe77Co4Zr9B10 amorphous alloy was prepared by single roller quenching method and the alloy was heat-treated at different temperatures. The crystallization behavior, microstructure and magnetic properties of Fe77Co4Zr9B10 alloy ribbons were investigated by differential thermal analyzer (DTA), X-ray diffraction (XRD), atomic force microscopy (AFM) and vibrating sample magnetometer (VSM) . The results show that the crystallization activation energy Ep of the crystallization peak temperature Tp of Fe77Co4Zr9B10 amorphous alloy is 525.19 kJ / mol. Α-Fe and α-Mn type precipitates were observed in the initial stage of crystallization of Fe77Co4Zr9B10 amorphous alloy. At 943 K annealing, α-Mn type crystallites disappeared. In the early stage of crystallization, the precipitation of α-Mn type precipitates leads to the deterioration of coercive force (Hc). The decrease of Hc and the disappearance of α-Mn type crystallites and the increase of the volume fraction of α-Fe phase after 943K annealing related.