2024-03-29T05:59:45Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/765652022-11-17T02:08:08Zhdl_2115_20045hdl_2115_139Fe-3 mass%SiO2焼結体の高温酸化に対する水蒸気添加の影響Effect of Water Vapor on the Oxidation Properties of Sintered Fe-3 mass%SiO<SUB>2</SUB> in air at 1273 K福本, 倫久Fukumoto, Michihisa1000010321960林, 重成Hayashi, Shigenari前田, 滋Maeda, Shigeru成田, 敏夫Narita, Toshioopen accessironiron-silicon alloysintered Fe-3 mass%SiO2high temperature oxidationeffect of water vaporoxidation kineticsinner layerdissociation560Oxidation properties of sintered Fe-3 mass%SiO2 (Fe-3SiO2) as well as Fe-1.5 mass%Si alloy (Fe-1.5Si) and Fe, for comparison, were investigated at 1273 K for up to 7.2 ks in air and air containing 10.5 vol%H2O (air-10.5H2O). In air-10.5H2O, the Fe-3SiO2 was oxidized faster than in air and also than the Fe-1.5Si in air-10.5H2O. The scale was composed of a duplex structure, an inner FeO+Fe2SiO4 and an outer Fe-oxides layers, where many voids existed in both layers. The similar scale structure containing voids was observed for the Fe-3SiO2 in air. Marker experiment with a small Pt wire was carried out for the Fe-3SiO2 oxidized in air-10.5 vol%H2O and the Pt-marker located between the inner and outer layers, suggesting that the inner layer grows due to inward migration of oxygen and the outer layer due to outward iron diffusion. In both air and air-10.5H2O Fe showed a parabolic oxidation, forming exclusively an outer Fe-oxides scale. It was suggested that SiO2, which changed to FeO+Fe2SiO4, acts as an obstacle for the outer layer recession, leading a formation of voids in the inner layer. Oxygen used to form the inner FeO+Fe2SiO4 layer was supplied by the dissociation of outer Fe-oxides, leaving voids, probably by a perforating dissociation mechanism. Both oxygen and water molecules could be diffusing species through the void.日本金属学会2001-02jpnjournal articleVoRhttp://hdl.handle.net/2115/76565https://doi.org/10.2320/jinstmet1952.65.2_1150021-48761880-6880AN00062446日本金属学会誌Journal of the Japan Institute of Metals652115121https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/76565/1/J.%20Jpn%20Inst.%20Met.%20Mater.%2065%282%29%20115.pdfapplication/pdf1.34 MB2001-02