Thermal insulation system employing oxide ceramic matrix composites
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B32B-003/14
B32B-003/18
B05D-001/12
B05D-003/02
출원번호
US-0689809
(2003-10-20)
발명자
/ 주소
DiChiara, Jr., Robert A.
출원인 / 주소
The Boeing Company
대리인 / 주소
Ingrassia Fisher &
인용정보
피인용 횟수 :
12인용 특허 :
4
초록▼
A ceramic tile includes a ceramic core material and an oxide ceramic matrix composite (CMC), where the ceramic core material has at least one surface covered by the oxide CMC. The oxide CMC includes a ceramic fiber, with a cured metal oxide ceramic material impregnating the ceramic fiber. An exempla
A ceramic tile includes a ceramic core material and an oxide ceramic matrix composite (CMC), where the ceramic core material has at least one surface covered by the oxide CMC. The oxide CMC includes a ceramic fiber, with a cured metal oxide ceramic material impregnating the ceramic fiber. An exemplary embodiment of the ceramic tile provided as part of the invention further includes a tough low temperature cure coating (TLTC) which infiltrates the ceramic core surface before it is covered by the oxide CMC. The TLTC includes a cured ceramic powder together with a binder. The metal oxide ceramic material impregnating the ceramic fiber, and the TLTC are co-cured, meaning that neither is cured when the CMC is wrapped around a surface of the TLTC-infiltrated ceramic core, and a curing step is performed on both uncured ceramic materials at the same time.
대표청구항▼
1. A ceramic tile, which comprises:a ceramic core material; having a surface; a tough low temperature cure coating (TLTC) infiltrating the surface, the TLTC comprising a cured ceramic powder combined with a binder; and an oxide ceramic matrix composite (CMC), covering the surface infiltrated with th
1. A ceramic tile, which comprises:a ceramic core material; having a surface; a tough low temperature cure coating (TLTC) infiltrating the surface, the TLTC comprising a cured ceramic powder combined with a binder; and an oxide ceramic matrix composite (CMC), covering the surface infiltrated with the TLTC, the oxide CMC comprising: a ceramic fiber; and a cured metal oxide ceramic material impregnating said ceramic fiber. 2. A ceramic tile according to claim 1, wherein said cured metal oxide ceramic material impregnating said ceramic fiber and said TLTC are co-cured.3. A ceramic tile according to claim 1, wherein said ceramic core material has a coefficient of thermal expansion, and said TLTC raises said coefficient of thermal expansion of said ceramic core material.4. A ceramic tile according to claim 1, wherein said ceramic powder comprises cordierite.5. A ceramic tile according to claim 1, wherein said binder comprises silica sol.6. A ceramic tile according to claim 1, wherein said TLTC infiltrates every surface of said ceramic core material, and said oxide CMC entirely surrounds said ceramic core material.7. A ceramic tile according to claim 1, wherein substantially none of said TLTC lies on said surface of said ceramic core material.8. A ceramic tile according to claim 1, wherein said TLTC further comprises an emissivity-modifying agent that modifies the emissivity of a region of said ceramic core material surrounding said surface.9. A ceramic tile according to claim 1, wherein said oxide CMC entirely surrounds said ceramic core material.10. A ceramic tile according to claim 1, wherein said ceramic core material comprises a sintered mat pf ceramic fibers.11. A ceramic tile according to claim 9, wherein said ceramic fibers comprise silica fibers, aluminoborosilicate fibers, and alumina fibers.12. A method of forming a ceramic tile, which comprises the steps of:infiltrating a surface of a ceramic core material with a tough low temperature cure coating (TLTC) comprising a cured ceramic powder combined with a binder; and covering the TLTC-infiltrated surface of the ceramic core material with an oxide ceramic matrix composite (CMC), said oxide CMC comprising: a ceramic fiber, and a cured metal oxide ceramic material impregnating said ceramic fiber. 13. A method according to claim 12, which further comprises the step of:pre-shrinking said ceramic fiber prior to impregnating said ceramic fiber with said metal oxide ceramic material. 14. A method according to claim 13, wherein said pre-shrinking step comprises heating said ceramic fiber.15. A method according to claim 14, wherein said ceramic fiber is heated to about 1800° F. during said pre-shrinking step.16. A method according to claim 12, which further comprises the step of:co-curing said cured metal oxide ceramic material impregnating said ceramic fiber and said TLTC. 17. A method according to claim 16, wherein no curing process has been performed for either said cured metal oxide ceramic material impregnating said ceramic fiber or said TLTC prior to said co-curing step.18. A method according to claim 16, wherein said co-curing step is performed using an autoclave between about 25 and about 100 psi.19. A method according to claim 18, wherein said co-curing step is performed between about 50 and about 80 psi.20. A method according to claim 18, wherein said co-curing step is performed at a temperature ranging between ambient temperature and about 500° F.21. A method according to claim 12, wherein said ceramic core material has a coefficient of thermal expansion, and said TLTC raises said coefficient of thermal expansion of said ceramic core material.22. A method according to claim 12, wherein said ceramic powder comprises cordierite.23. A method according to claim 12, wherein said binder comprises silica sol.24. A method according to claim 12, wherein said infiltrating step comprises infiltrating every surface of said ceramic core material, and said covering step comprises entirely surrounding said ceramic core material.25. A method according to claim 12, wherein upon completion of said infiltrating step substantially none of said TLTC lies on said surface of said ceramic core material.26. A method according to claim 12, wherein said TLTC further comprises an emissivity-modifying agent that modifies the emissivity of a region of said ceramic core material surrounding said surface.27. A method according to claim 12, wherein said covering step comprises entirely surrounding said ceramic core material.28. A method according to claim 12, wherein said ceramic core material comprises a sintered mat of ceramic fibers.29. A method according to claim 28, wherein said ceramic fibers comprise silica fibers, aluminoborosilicate fibers, and alumina fibers.30. A ceramic tile produced by a method which comprises the steps of:infiltrating a surface of a ceramic core material with a tough low temperature cure coating (TLTC) comprising a cured ceramic powder combined with a binder; and covering the TLTC-infiltrated surface of the ceramic core material with an oxide ceramic matrix composite (CMC), said oxide CMC comprising: a ceramic fiber, and a cured metal oxide ceramic material impregnating said ceramic fiber. 31. A ceramic tile according to claim 30, wherein said method further comprises the step of:co-curing said cured metal oxide ceramic material impregnating said ceramic fiber and said TLTC. 32. A ceramic tile according to claim 30, wherein said method further comprises the step of:pre-shrinking said ceramic fiber prior to impregnating said ceramic fiber with said metal oxide ceramic material. 33. A ceramic tile according to claim 32, wherein said pre-shrinking step comprises heating said ceramic fiber.34. A method according to claim 33, wherein said ceramic fiber is heated to about 1800° F. during said pre-shrinking step.
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이 특허에 인용된 특허 (4)
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