Abstract
The effect of Al2O3 coating on oxidation and hot corrosion was investigated at 700 °C in an atmosphere of 9 %O2 + 0.2 %HCl + 0.08 %SO2 + N2. Isothermal oxidation testing indicated that the coating was very effective in reducing the oxidation rate of γ-TiAl. The technology of magnetron sputtering used in this study allowed the deposition of a coating that ensured the improvement of high temperature oxidation resistance without interference in mechanical properties of the alloy.
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