一、前言 近年来,不少学者采用透射电镜及穆斯鲍尔谱线仪等先进手段对Fe-Al合金中的有序—无序转变进行研究,在许多方面取得了一致看法,但仍有一些分歧。本文将简述我们的一些看法。 二、Fe_3Al有序相和FeAl有序相 众所周知,由于Fe-Al原子间的吸力大于Fe-Fe和Al-Al原子间的吸力,且Fe和Al间的电化性相差较小等,在≤50at％Al— I. Introduction In recent years, many scholars have studied the order-disorder transition in Fe-Al alloys by using advanced techniques such as transmission electron microscopy (TEM) and Muswell-Bauer spectroscopy and have reached consensus on many aspects. However, there are still Some differences. This article will outline some of our observations. Second, the Fe 3 Al ordered phase and the FeAl ordered phase As we all know, because the suction between the Fe-Al atoms is greater than the Fe-Fe and Al-Al atoms between the suction, and Fe and Al between the electrochemical difference is small, at ≤ 50at % Al-