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US 9,447,503 B2Granted
Closed pore ceramic composite article
AssigneeUnited Technologies Corporation
InventorsSusan M. Tholen, Christopher W. Strock
Life of this patent
Estimating the term…
Abstract
A composite article includes a substrate and a thermal barrier secured to the substrate. The thermal barrier includes a plurality of closed pores within a ceramic matrix. For example, the closed pores comprise 20 vol % to 80 vol % of the thermal barrier.
Claims17
A composite article comprising:
- a substrate;
- and
- a thermal barrier secured to the substrate, the thermal barrier comprising a plurality of closed pores within a ceramic matrix, wherein the ceramic matrix comprises at least one of yttria stabilized zirconia and molybdenum disilicide.
A method of manufacturing a thermal barrier, comprising:
- forming the thermal barrier with a plurality of closed pores within a ceramic matrix, including forming the thermal barrier from a ceramic material having a pore-forming agent including nano-sized ceramic particles and sintering the pore-forming agent to reduce the size of the pore-forming agent and thereby form the closed pores.
A turbine blade outer air seal comprising:
- a body extending between two circumferential sides, a leading edge and a trailing edge, and a radially inner side and a radially outer side;
- and
- a thermal barrier secured to the body, the thermal barrier comprising a plurality of closed pores within a ceramic matrix, wherein the ceramic matrix comprises at least one of yttria stabilized zirconia and molybdenum disilicide.
Dependencies are inferred from the claim text.