ラマン分光法を用いた高温酸化皮膜の"その場"観察装置の開発

概要

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In-situ observation system for oxidation films using laser Raman spectroscopy was constructed and the growth process of oxide films during thermal oxidation of Fe-6.5mass%Si alloy at 1073K in O_2, CO_2 and CO-CO_2 (P_<CO>/P_<CO_2>=1) atmospheres was investigated. In-situ Raman spectra of the oxide films formed in these atmospheres could be obtained using the system with an SN-filter and a chopper unit to reduce the effect of Rayleigh scattering and thermal radiation. In a CO_2 atmosphere strong Raman peaks of Fe_2O_4 and α-Fe_2O_3 were observed even in the early stage of oxidation of the alloy, which suggested that the oxidation rate in the CO_2 atmosphere was higher than that in the O_2 or CO-CO_2 atmosphere. Since the difference of oxidation behavior in these atmospheres was not detected by thermogravimetry, the usefulness of the system at high temperatures was confirmed.
社団法人日本鉄鋼協会の論文
1995-06-01