Research Progress of Multilayer Structure of Plasma Sprayed Thermal Barrier Coatings

Abstract

Based on the development status of thermal barrier coatings, SPS (suspension plasma spraying), SPPS (solution precursor plasma spraying) and PS-PVD (plasma spraying-physical vapor deposition) technologies and the structural performance characteristics of the thermal coatings prepared by the above methods were summarized. Meanwhile, the development of single-layer, multi-layer and gradient coatings of plasma sprayed thermal barrier coatings was reviewed, and the effects of structural changes of ceramic materials system of La2Zr2O7, Gd2Zr2O7 and La2Ce2O7 on the properties of coating were emphatically summarized. Furthermore, the development prospects of multilayer structure of thermal barrier coatings were prospected.

Keywords

• thermal barrier coating|preparation process|plasma spraying|coating structure