Evolution of microstructural and mechanical properties of lanthanum zirconate thermal barrier coatings at high temperature

摘要

Ceramic thermal barrier coatings (TBCs) are advanced systems for more efficient turbine engines. In this work, thick lanthanum zirconate TBCs were fabricated by Air Plasma Spraying (APS). The coatings showed a lamellar microstructure containing splat boundaries, pores and microcracks. After thermal exposure at 1200 and 1350 degrees C the partial sintering of the porous microstructure occurred.