High-temperature oxidation of copper using oxidative constructing approach
Kinetics of oxidation of copper in the temperature range of 600-1000°C has been studied in the frame of materials oxidative constructing approach. The structure and phase state of oxidized layer was investigated. It is found that in the temperature range studied the kinetics of copper oxidation is described by a parabolic law. Resultant compact oxide ceramics has an uniform thickness and the structure of near the surface oxide layer is represented by tenorite phase while the main bulk is composed of cuprite phase. At 600 and 700°C surface layer has a polycrystalline needle-shaped grain structure. It is ascertained that oxide Cu2O is formed on the lat surface at 700 and 800°C on which has a good adhesion to the surface and is optically transparent in the visible light spectrum.