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US 11,905,222 B2Granted
Environmental barrier coating for enhanced resistance to attack by molten silicate deposits
AssigneeRtx Corporation
InventorsElisa M Zaleski, Richard Wesley Jackson, Xia Tang
Life of this patent
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Abstract
An environmental barrier coating, comprising a substrate containing silicon; an environmental barrier layer applied to said substrate; said environmental barrier layer comprising a rare earth composition.
Claims4
An environmental barrier coating, comprising:
- a substrate containing silicon;
- an environmental barrier layer applied to said substrate;
- said environmental barrier layer comprising a rare earth composition;
- wherein said environmental barrier layer comprises an apatite comprising mI4MII6(SiO4)6X2 in which MI are seven-fold coordinated cation sites and MII are nine-fold coordinated cation sites, and X is an anion sites that is distinct from the oxygen within the silica tetrahedral, wherein said apatite further comprises Mg and Fe additions.
1 more element
Dependencies are inferred from the claim text.