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US 11,952,902 B2Granted
Environmental barrier multi-phase abradable coating
AssigneeRtx Corporation
InventorRichard Wesley Jackson
Life of this patent
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Abstract
Disclosed is a multi-phase abradable coating including a ceramic matrix and a dislocator phase.
Claims12
A multi-phase abradable coating comprising a ceramic matrix and a dislocator phase dispersed in the ceramic matrix,
- wherein the dislocator phase transforms to a micro-cracked phase through exposure to a combustion gas atmosphere,
- wherein the multi-phase abradable coating has a porosity of 5 to 10%,
- wherein the ceramic matrix comprises hafnium dioxide, a rare earth disilicate, a rare earth monosilicate, BSAS, hafnium silicate, or a combination thereof.
A shroud for a gas turbine engine turbine section comprising a coating system, and a ceramic component, wherein the coating system comprises a multi-phase abradable coating in combination with a top coat, a bond coat, or a combination thereof,
- wherein the multi-phase abradable coating comprises a ceramic matrix and a dislocator phase dispersed in the ceramic phase wherein the dislocator phase transforms to a micro-cracked phase through exposure to a combustion gas atmosphere,
- wherein the multi-phase abradable coating has a porosity of 5 to 10%,
- wherein the ceramic matrix comprises hafnium dioxide, a rare earth disilicate, a rare earth monosilicate, BSAS, hafnium silicate, or a combination thereof.
Dependencies are inferred from the claim text.