Experimental Investigation of High-Temperature Interactions of Yb₂Si₂O₇ with Molten Calcia-Magnesia-Alumina-Silicate (CMAS) Deposits

Author(s):

Christopher Louzon, Anindya Ghoshal, and Andrew J Wright

Abstract:

Three experimental methods are applied to Yb₂Si₂O₇ environmental barrier coating samples to examine coating interactions with calcia-magnesia-alumina-silicate (CMAS) deposits. Thermal cycling and CMAS deposition are performed with an atmospheric burner-rig. Thermal cycling with CMAS loading is performed separately using a box furnace. The contact angle of CMAS as it melts atop a sample is measured using a high-temperature contact-angle measurement system. This testing demonstrates the variety of data achievable from different testing methods. Future work will include a full evaluation of a candidate coating for next-generation gas-turbine engines.