# US 8,202,588 B2 · Hybrid ceramic structure with internal cooling arrangements > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,202,588 B2 - Document ID: US8202588B2 - Status: Granted - Kind: B2 - Application number: 12/099,434 - Filed: 2008-04-08 - Published: 2009-10-08 - Granted: 2012-06-19 - Earliest claimed: 2008-04-08 - Assignees: Siemens Energy, Inc. - Inventors: Dougas A. Keller; Malberto F. Gonzalez; Jay A. Morrison - Web page: https://patentgrep.com/patent/US8202588B2 ## CPC - B32B 18/00: Layered products essentially comprising ceramics, e.g. refractory products - F01D 5/282: {Selecting composite materials, e.g. blades with reinforcing filaments} - F01D 25/12: Cooling - C04B 2235/5224: Alumina or aluminates - C04B 2237/341: Silica or silicates - C04B 2237/343: Alumina or aluminates - C04B 2237/38: Fiber or whisker reinforced - C04B 2237/62: Forming laminates or joined articles comprising holes, channels or other types of openings - C04B 2237/76: Forming laminates or joined articles comprising at least one member in the form other than a sheet or disc, e.g. two tubes or a tube and a sheet or disc - F05D 2300/5024: Heat conductivity - F05D 2300/6033: Ceramic matrix composites [CMC] - Y10T 428/131: Glass, ceramic, or sintered, fused, fired, or calcined metal oxide or metal carbide containing [e.g., porcelain, brick, cement, etc.] - Y10T 428/1314: Contains fabric, fiber particle, or filament made of glass, ceramic, or sintered, fused, fired, or calcined metal oxide, or metal carbide or other inorganic compound [e.g., fiber glass, mineral fiber, sand, etc.] - Y10T 428/1317: Multilayer [continuous layer] - Y10T 428/249973: Mineral element - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A structure for use in high temperature applications is provided. The structure may include an inner ceramic matrix composite (CMC) material (12). At least a portion of this CMC material includes waves that define a first wavy surface (140 and an opposed second wavy surface (16). A ceramic insulation material (18) may be bonded with the first wavy surface and includes a distal surface (20) for exposure to a high temperature environment. A core material (22) is bonded with at least a portion of the second wavy surface. One or more cooling channels (24) are disposed in the core material. An outer CMC material (26) may be joined to a portion of the inner CMC material. The core material is a material different than a matrix material of the inner CMC material. ## Claims ### Claim 1 A structure comprising: an inner ceramic matrix composite (CMC) material, at least a portion of which comprises waves, the waves defining a first wavy surface and an opposed second wavy surface; a core material bonded with at least a portion of the second wavy surface, wherein a coefficient of thermal conductivity of the core material is higher relative to a coefficient of thermal conductivity of the inner CMC material; a cooling channel disposed in the core material; and an outer CMC material joined to a portion of the inner CMC material, wherein the core material comprises a material different than a matrix material and/or the material of the fibers of the inner CMC material. ### Claim 2 (depends on 1) The structure of claim 1 comprising a tubular structure, the tubular structure having a thermal insulation layer defining at least a central passageway therein, the distal surface of the thermal insulation layer having a non-wavy surface for the passage of a hot gas through the passageway. ### Claim 3 (depends on 1) The structure of claim 1, wherein an inner surface of the outer CMC material is joined to the inner CMC material at a crest of the second wavy surface of the inner CMC material. ### Claim 4 (depends on 1) The structure of claim 1, wherein the outer CMC material is joined to the inner CMC material through at least one interlocking device. ### Claim 5 (depends on 2) The structure of claim 2, wherein the outer CMC material comprises a circumferentially closed wrap about the tubular structure, wherein the wrap is arranged to enclose an entire outer surface of a cylindrical portion of the tubular structure. ### Claim 6 (depends on 2) The structure of claim 2, wherein the outer CMC material comprises a circumferentially closed strap about the tubular structure, wherein the strap is arranged to partially enclose an outer surface of a cylindrical portion of the tubular structure. ### Claim 7 (depends on 1) The structure of claim 1, wherein the outer CMC material comprises a first wavy surface and a second wavy surface. ### Claim 8 (depends on 7) The structure of claim 7, wherein the second wavy surface of the outer CMC material is joined to the second wavy surface of the inner CMC material at corresponding crest regions of said second wavy surfaces. ### Claim 9 (depends on 8) The structure of claim 8, wherein the second wavy surface of the outer CMC material is spaced apart from the second wavy surface of the inner CMC material at corresponding valley regions of said second wavy surfaces to define a pocket for containing the core material. ### Claim 10 (depends on 1) The structure of claim 1, further comprising a ceramic insulation material bonded with the first wavy surface and comprising a distal surface for exposure to a high temperature environment. ### Claim 11 (depends on 1) The structure of claim 1, wherein the inner CMC material comprises a first material composition, and the outer CMC material comprises a second material composition, and further wherein said first and second material compositions are different from one another. ### Claim 12 A hybrid ceramic structure comprising: an inner ceramic matrix composite (CMC) member, at least a portion of which comprises waves defining a first wavy surface and an opposed second wavy surface; a thermal insulation member bonded with the first wavy surface, and comprising a distal surface; an outer CMC member joined to a portion of the inner CMC member, the inner CMC and the outer CMC members comprising spaced apart regions that define at least one pocket therebetween; a core material disposed in at least a portion of said pocket, wherein the core material comprises a material different than a matrix material and/or the material of the fibers of the inner CMC member, wherein a coefficient of thermal conductivity of the core material is higher relative to a coefficient of thermal conductivity of the inner CMC material; and a cooling channel disposed in the core material. ### Claim 13 (depends on 12) The structure of claim 12, wherein an inner surface of the outer CMC member is joined to the inner CMC member at a crest of the second wavy surface of the inner CMC member. ### Claim 14 (depends on 12) The structure of claim 12, wherein the outer CMC member is joined to the inner CMC member through at least one interlocking device. ### Claim 15 (depends on 12) The structure of claim 12, wherein the outer CMC member comprises a first wavy surface and a second wavy surface. ### Claim 16 (depends on 15) The structure of claim 15, wherein the second wavy surface of the outer CMC member is joined to the second wavy surface of the inner CMC member at corresponding crest regions of said second wavy surfaces. ### Claim 17 (depends on 16) The structure of claim 16, wherein the second wavy surface of the outer CMC member is spaced apart from the second wavy surface of the inner CMC member at corresponding valley regions of said second wavy surfaces to define the pocket for containing the core material. ### Claim 18 A tubular structure comprising: an inner ceramic matrix composite (CMC) material, at least a portion of which comprises waves, the waves defining a first wavy surface and an opposed second wavy surface; a ceramic insulation material bonded with the first wavy surface and comprising a distal surface for exposure to a high temperature environment; a core material bonded with at least a portion of the second wavy surface, wherein a coefficient of thermal conductivity of the core material is higher relative to a coefficient of thermal conductivity of the inner CMC material; a cooling channel disposed in the core material; and an outer CMC member joined to a portion of the inner CMC material, wherein the core material comprises a material different than a matrix material and/or the material of the fibers of the inner CMC material, and further wherein the tubular structure includes a thermal insulation layer, which defines at least a central passageway therein, the distal surface of the thermal insulation layer having a non-wavy surface for the passage of a hot gas through the passageway. ### Claim 19 (depends on 18) The structure of claim 18, wherein the outer CMC material comprises a circumferentially closed wrap about the tubular structure, wherein the wrap is arranged to enclose an entire outer surface of a cylindrical portion of the tubular structure. ### Claim 20 A structure comprising: an inner ceramic matrix composite (CMC) material, at least a portion of which comprises waves, the waves defining a first wavy surface and an opposed second wavy surface; a core material bonded with at least a portion of the second wavy surface; a cooling channel disposed in the core material; and an outer CMC material joined to a portion of the inner CMC material, wherein the core material comprises a material different than a matrix material and/or the material of the fibers of the inner CMC material, wherein the fibers of the inner CMC material comprise a plurality of continuous fibers extending parallel to the first and second wavy surfaces.