Patent ID: 11952902
Assignee: RTX CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC F  C | IPC C  F

Claim 4:
5. 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.