Gradient TiAl/TiAl + SiC coatings on the gamma titanium aluminide were fabricated by using electron beam physical vapor deposition (EB-PVD) technique, and the oxidation resistance behavior was investigated. The coating surface was in the structure containing mainly TiAl and SiC identified by the X-ray diffractometer. The oxidation resistance depends on the ratio of the surfacial content of SiC to TiAl. Only 1.03 mg/cm2weight gain was recorded after isothermal oxidation at 1173 K in air for 200 h, and no spallation was recognized after cyclic oxidation at 1173 K in air for 100 h for the coating with the ratio of approximately 8:3 TiAl/SiC. The contribution of SiC to the improvement of the oxidation resistance can be considered as the formation of amorphous SiO2. (C) 2000 Elsevier Science S.A. All rights reserved.
Gong, S., Xu, H., Yu, Q., & Zhou, C. (2000). Oxidation behavior of TiAl/TiAl-SiC gradient coatings on gamma titanium aluminides. In Surface and Coatings Technology (Vol. 130, pp. 128–132). Elsevier Sequoia SA. https://doi.org/10.1016/S0257-8972(00)00694-0