Biomimetic GYbZ thermal barrier coatings against CMAS adhesion and wetting

摘要

The silicate depo sits from volcanic ash, desert sand and dust melt at high temperature and adhere to the hot components of turbine engines; whereupon attack the thermal barrier coatings (TBCs), eventually leading to the premature failure of the TBCs, thereby endangering operating safety. The challenge for the high -temperature protective coatings is how to improve CMAS resistance of thermal barrier coatings. Recently, a 10 mol% Yb2O3-doped Gd2Zr2O7 (GYbZ) TBC has been developed as one of the most promising candidates of advanced TBC materials. In this paper, we attempt to construct biomimetic microstructure on GYbZ coating surface, providing theoretical and technical support for the development of ultra -high temperature thermal barrier coatings with excellent silicate resistance for the next generation aero-engine.