Abstract
Accommodating relatively high engine component surface temperatures is a significant challenge that must be overcome in order to fully realize engine performance benefits associated with implementing CMC materials having relatively low density and higher temperature capability. The design surface temperature for selected components is expected to exceed the 1414°C (2577°F) melting point of silicon, a key CMC constituent, and thus protective coatings are required. This paper discusses challenges in developing the coating system, specifically addressing issues related to the selection of materials, designing the coating architecture, and the test methodology.
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