Fe-Si-Al细晶薄带的脆性及磁性研究

Study on Brittleness and Magnetism of Fe-Si-Al Fine Grain Ribbon

利用急冷快淬技术制备了微合金化后的Ｆｅ－Ｓｉ－Ａｌ细晶薄带，结果表明在保持良好 的软磁性下，添加适当的合金元素，材料的脆性有明显的改善。利用Ｘ射线、透射及 扫描电镜进行有序化状态下的物相分析并观察其显微组织，进一步探讨了材料脆性的原 因。示差热分析测定了无序及有序转变温度Ｔｃ，结果表明微合金化对Ｔｃ的影响很小。

The fine grain ribbons of microalloyed Fe-Si-Al were prepared with rapidly quenched process. It turns out that the brittleness of this material can be improved by addition of certain alloy elements without losing its excellent soft magnetism. Both analysis of phase and observations of microstructure in both as-prepared and long range order states were carried out to analyse the cause of brittleness of this material by means of Xray, TEM and SEM. The results of DAT shows that the temperature of disorder-order transformation had hardly been affected by microalloying.