CH_3Si(OC_2H_5)_3と各種の酸化物粉末から作製したコンポジット膜のステンレス鋼板へのコーティング

概要

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Adhesion and crack formation of coating films prepared from methyltriethoxysilane (MTES) on stainless steel sheets (SUS) after a thermal shock test were studied and their relation to a structure change of the films was discussed. Peeling-off caused by crack formation of the coating films prepared from MTES was observed after the thermal shock test at temperatures higher than 450℃. It was found that these damages were brought about by densification with the thermal decomposition of CH_3 groups in the MTES-derived films and also by difference in thermal expansion coefficient between coating film and SUS substrate. For the purpose of the improvement of the above properties, composite coatings containing various oxide powders, such as SiO_2, Al_2O_3, ZrSiO_4, MnO_2 and Fe_2O_3, were made. Adhesion after the thermal shock test in the composite films with any of these powders was considerably improved due to the reinforcement by the added powders, the expansion coefficient of which was close to that of SUS.
社団法人日本セラミックス協会の論文
2000-10-01