Thermal and Mechanical Properties of Novel Lanthanum Zirconate Based Thermal Barrier Coatings Available to Purchase

This study evaluates the thermal and mechanical properties of plasma-sprayed lanthanum zirconate thermal barrier coatings and compares them with conventional 8YSZ TBCs. The La₂Zr₂O₇ coatings were found to have a lower thermal conductivity than 8YSZ, although this is offset by lower bond cap tensile strength and poor erosion resistance. A double-layered structure with a La₂Zr₂O₇ coating on porous YSZ was also tested and is shown to have better thermal shock performance than single-layer La₂Zr₂O₇ and double-layer structures formed on dense 8YSZ sublayers.