Development of"in situ"measuring system for an oxidization process of metals by using Raman spectroscopy

从以下几个方面来看，激光拉曼光谱是最适合于原位观察金属氧化过程的方法之一；样品不会被破坏，并且可以用显微拉曼光谱分析一小块区域。我们研制了一种利用拉曼光谱对金属氧化过程进行原位测量的系统，该系统由三重单色仪、CCD探测器和可改变环境条件的加热台组成。该系统阐明了在1073K的O_2和CO_2气氛中，Fe-6.5质量%Si合金热氧化过程中氧化膜的生长过程与SiO_2表面氧缺陷的浓度有关。该系统还用来观察液态铝和铝镁合金在1273K下的氧化过程。本研究开发的系统是一种适合于原位观察氧化特别是在高温下氧化的方法。

Laser Raman spectroscopy is one of the most suitable methods for"in situ"observation of the oxidization process of metals from the following points of view ; specimens are not destroyed and a small area can be analyzed by micro-Raman spectroscopy. We developed the "in situ"measuring system, which has a triple monochromator, a CCD detector, and a heating stage which can change the environmental conditions, for an oxidization process of metals by using Raman spectroscopy. This system clarified that the growth process of oxide films during thermal oxidization of Fe-6.5mass%Si alloy at 1073K in O_2 and CO_2 atmospheres depends on the concentration of the oxygen defects in the SiO_2 surface layr. This system also performed to observe the oxidization of the liquid Al and Al-Mg alloys at 1273K.This system developed in this study is the suitable method for"in situ"observation of oxidization especially at high temperatures.