Preparation and characterization of oxidation resistive multilayer coating films with yittrium oxide protective layer for ultrahigh temperature applications
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초록
Carbon fiber reinforced carbon matrix composites have excellent thermo-mechanical properties, but they are degradedrapidly by oxidation at high temperatures in air. Silicon carbide is the best candidate for the oxidation resistive coating forthe carbon composites at high temperature. Multilayer oxidation resistive coating film consisting of three or four layersincluding silicon carbide has been prepared by chemical vapor deposition method and polymer precurser method. Microstructure and chemical composition of coating films were examined by electron microscopy techniques. It was found thatcarbon composites with multilayer coating films were stable at high temperature with a weight loss under 1% at 1700 and1900 oC in high and low oxygen partial pressure environment.
Abstract
Carbon fiber reinforced carbon matrix composites have excellent thermo-mechanical properties, but they are degradedrapidly by oxidation at high temperatures in air. Silicon carbide is the best candidate for the oxidation resistive coating forthe carbon composites at high temperature. Multilayer oxidation resistive coating film consisting of three or four layersincluding silicon carbide has been prepared by chemical vapor deposition method and polymer precurser method. Microstructure and chemical composition of coating films were examined by electron microscopy techniques. It was found thatcarbon composites with multilayer coating films were stable at high temperature with a weight loss under 1% at 1700 and1900 oC in high and low oxygen partial pressure environment.
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