Effect of an Al2O3 coating on the oxidation process of a γ-TiAl phase based alloy

The effect of Al2O3 coating on oxidation was investigated at 900 and 950 °C. Isothermal oxidation testing indicated that 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.

► The Al2O3 coating may be a method for improving oxidation resistance.
► The deposited Al2O3 coating slows down the rate of oxidation.
► The coating reduces spalling processes and makes for lesser mass growth.