Abstract
Lanthanum cerate (LC) is one of the potential candidates for thermal barrier coatings (TBCs) by virtue of its high melting point and favorable thermophysical properties. Infiltration of silicate in LC coating was found to be effectively arrested by forming La-Ce apatite. To qualify LC based material for next-generation TBCs, it is essential to understand the role of rare earth oxides (REOs) dopants that can manage the thermal expansion coefficient values and provides improved performance in volcanic ash infiltration resistance. Accordingly, various REOs doped LC was synthesized, plasma sprayed to generate free-standing coupons, and evaluated their volcanic ash infiltration resistance.
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