In Search of Durable Sandphobic Thermal/Environmental Barrier Coatings for Rotorcraft Gas Turbine Engines
Author
Murugan, Muthuvel
Ghoshal, Anindya
Walock, Michael
Bravo, Luis
Koneru, Rahul
Jain, Nishan
Mock, Clara
Pepi, Marc
Nieto, Andy
Flatau, Alison
Sampath, Sanjay
Dorfman, Mitch
Date
2021-01Metadata
Show full item recordAbstract
The objective of this research is to develop new thermal/environmental barrier coatings (T/EBCs) that exhibit greater durability and CMAS (Calcia-Magnesia-Alumino-Silicates) resistance than any of the current state-of-the-art rotorcraft turbine engine coatings. Commercial/Military aircraft engines, especially helicopter engines undergo severe damage to critical components when they need to operate over sandy terrains or volcanic zones. Typical high pressure turbine vanes/blades with current coatings undergo damages that include blade coating wear, sand glazing, Calcia-Magnesia-Alumina-Silicates (CMAS) attack, oxidation, plugged cooling holes, all of which can cause rapid engine performance loss and in severe cases ending up in loss of aircraft. Design of novel T/EBCs for high temperature operation is presented in this paper based on ongoing work in understanding the fundamental governing parameters affecting CMAS adhesion, build-up, and chemical attack. The paper intends to report specific objectives and findings obtained thus far from an ambitious T/EBC research program funded by OSD’s Strategic Environmental Research and Development Program (SERDP). Systematic sand-phobic development research efforts and methodologies from modeling to engine relevant high-temperature environmental test evaluations are described in this paper to innovate improved T/EBCs for both Ni-superalloy based substrates and emerging SiC-SiC Ceramic Matrix Composite (CMC) based substrates.
Description
AIAA Scitech 2021 Forum
The article of record as published may be found at https://doi.org/10.2514/6.2021-0874
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
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