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US 2025/0066618 A1Published application
Coating systems for silicon-containing substrates
AssigneeROLLS-ROYCE plc
InventorRobert Golden
Life of this patent
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Abstract
An article includes a silicon-containing ceramic substrate and a coating system overlying the silicon-containing ceramic substrate. The coating system includes an intermediate coating overlying the silicon-containing ceramic substrate and a barrier coating overlying the intermediate coating. The intermediate coating includes silicon and hafnium disilicide. A coefficient of thermal expansion of the intermediate coat is less than about 7 parts per million (ppm) per degree Kelvin (K).
Claims20
An article comprising:
- a silicon-containing ceramic substrate;
- and
- a coating system overlying the silicon-containing ceramic substrate, wherein the coating system comprises:
- an intermediate coating overlying the silicon-containing ceramic substrate, wherein the intermediate coating includes silicon (Si) and hafnium disilicide (HfSi2), and wherein a coefficient of thermal expansion (CTE) of the intermediate coating is less than about 7 parts per million (ppm) per degree Kelvin (K);
- and
- a barrier coating overlying the intermediate coating.
3 more elements
A method of forming a coating system, comprising:
- forming an intermediate coating on a silicon-containing ceramic substrate, wherein the intermediate coating includes silicon (Si) and hafnium disilicide (HfSi2), and wherein a coefficient of thermal expansion (CTE) of the intermediate coating is less than about 7 parts per million (ppm) per degree Kelvin (K);
- and
- forming a barrier coating on the intermediate coating.
Dependencies are inferred from the claim text.