# US 10,781,319 B2 · Ultra high temperature environmental protection coating > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,781,319 B2 - Document ID: US10781319B2 - Status: Granted - Kind: B2 - Application number: 15/211,018 - Filed: 2016-07-15 - Published: 2016-11-03 - Granted: 2020-09-22 - Earliest claimed: 2011-01-21 - Assignees: Lockheed Martin Corporation - Applicants: Lockheed Martin Corporation - Inventors: Daniel H. Hecht - Web page: https://patentgrep.com/patent/US10781319B2 ## CPC - C09D 5/18: Fireproof paints {including high temperature resistant paints} - B64C 3/36: Structures adapted to reduce effects of aerodynamic or other external heating - B64C 11/205: {for protecting blades, e.g. coating} - C09D 1/00: Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances - F01D 5/288: {Protective coatings for blades} - B64C 30/00: Supersonic type aircraft - F05D 2300/512: Hydrophobic, i.e. being or having non-wettable properties - F05D 2300/6033: Ceramic matrix composites [CMC] - F05D 2300/608: Microstructure - Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - B64C: AEROPLANES; HELICOPTERS - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract An environmental protective coating (“EPC”) for protecting a surface subjected to high temperature environments of more than 3000 degree F. The coating includes a dense platelet lamellar microstructure with a self-sealing, compliant binder material for holding the platelets together. The platelets may be formed from materials that are resistant to high temperatures and impermeable, such as ceramics. The lamellar microstructure creates a tortuous path for oxygen to reach the surface. The binder material includes engineered free internal volume, which increases the elastic strain of the EPC. The binder is softer than the platelets, which in combination with its free volume increases pliability of the EPC. The binder may have sufficient glass content and glass-forming content for initial and long-term sealing purposes. ## Claims ### Claim 1 A coating for protecting a surface comprising: heat resistant platelets coupled to the surface and arranged in layers that are spaced apart from one another in a direction extending axially from the surface; spaces between adjacent platelets in the same layer, spaces between platelets in adjacent layers, and spaces between the platelets and the surface; a compliant binder in the spaces; and elongate voids having a generally rectangular cross section formed from shells and/or tubes in the binder that are strategically arranged to define axially spaced apart elongate layers of binder in the spaces, and that define elongate web members of binder that span between the spaced apart elongate layers of binder. ### Claim 2 (depends on 1) The coating of claim 1, wherein adjacent voids are generally parallel. ### Claim 3 (depends on 1) The coating of claim 1, wherein the tubes comprise a refractory or a ceramic. ### Claim 4 (depends on 3) The coating of claim 3, wherein the tubes further comprise a carbon tube. ### Claim 5 (depends on 1) The coating of claim 1, wherein some adjacent voids are parallel and define arrays, and wherein voids in some of the arrays are oblique to voids in other arrays so that the binder is anisotropic. ### Claim 6 (depends on 1) The coating of claim 1, wherein more than one layer of voids is disposed between axially spaced apart adjacent platelets. ### Claim 7 (depends on 1) The coating of claim 1, wherein the platelets comprise a refractory material. ### Claim 8 (depends on 1) The coating of claim 1, wherein the surface has portions with different coefficients of thermal expansion, and wherein the coating experiences a lateral strain from a lateral force that is exerted onto the binder when one of the portions expands a different amount than an adjacent portion. ### Claim 9 (depends on 1) The coating of claim 1, wherein elongate lengths of the web members extend in a direction generally perpendicular with the surface, and pivot to an orientation that is oblique with the surface when the coating undergoes a lateral strain. ### Claim 10 (depends on 9) The coating of claim 9, wherein the lateral strain is generated by a force that is applied laterally to the coating, and wherein the lateral strain absorbs a portion of the force and reduces a shear force in a bond between the surface and the coating that results from the force. ### Claim 11 (depends on 10) The coating of claim 10, wherein the force is generated by thermal expansion of the surface. ### Claim 12 (depends on 9) The coating of claim 9, wherein platelets in a one of the layers are displaced a first lateral distance when the coating undergoes the lateral strain, and wherein platelets in a layer adjacent the one of the layers are displaced a second lateral distance when the coating undergoes the lateral strain, and wherein the first and second lateral distances are different. ### Claim 13 (depends on 1) The coating of claim 1, wherein more than one row of voids are formed between adjacent platelets that are spaced axially apart.