OXIDATION BEHMIOR OF SPUTTERED MICROCRYSTALLINE Cu-Cr COATINGS

The oxidation of sputtered microcrystalline Cu-Cr coatings was studied in 0.1 MPa O2 at 700 and 800℃. The results indicate that the oxidation behavior of microcrystalline Cu-Cr coatings is very different from the conventional Cu-Cr alloy. A continuous Cr2O3 layer formed on microcrystalline Cu-Cr coatings, and oxidation of the microcrystalline Cu-Cr coatings containing 40%Cr produced an exclusive external Cr2O3 scale. The results were discussed with respect to properties of two-phase alloy.