Self-reinforced environmental barrier coatings
AssigneeOerlikon Metco (US) Inc.
InventorDianying CHEN
Life of this patent
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Abstract
A self-reinforced environmental barrier coating (EBC), methods of manufacturing the EBC, and articles comprising the EBC, are provided. The EBC is prepared from a composition of a rare earth silicate and an aluminum silicate at or near the eutectic point of the combination. The EBC forms a self-reinforcing fibrous phase that reduces or eliminates microcracks.
Claims21
-7. (canceled)
An article of manufacture comprising a substrate, a bond coat on the substrate, and an environmental barrier coat (EBC) on the bond coat, wherein
- the substrate comprises a silicon-based ceramic matrix composite,
- the bond coat comprises silicon, and
- the EBC comprises a composition of a rare earth silicate and an aluminum silicate, in a proportion within 20 mol % of the eutectic point of the composition, and comprises a reinforcing fibrous phase comprising the rare earth silicate.
-14. (canceled)
A method of manufacturing an environmental barrier coating comprising:
- providing a substrate;
- applying a bond coat to the substrate;
- and
- applying a barrier coat to the bond coat;
- wherein applying the barrier coat comprises applying a composition comprising a rare earth silicate and aluminum silicate, in a proportion within 20 mol % of the eutectic point of the composition,
- wherein the environmental barrier coating comprises a fibrous phase comprising the rare earth silicate.
(canceled)
-32. (canceled)
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-41. (canceled)
Dependencies are inferred from the claim text.