High temperature insulation for ceramic matrix composites
October 27, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3053694 3888691 Graded metal-to-ceramic structure for high temperature abradable seal applications and a method of producing said Non-combustible high temperature abradable seal material Turbine engine shroud Abradable ceramic seal and method of making same Composite powders sprayable to form abradable seal coatings Casing for a thermal turbomachine having a heat-insulating liner Abradable seal and its method of production Hollow sphere ceramic particles for abradable coatings InventorsAssigneeApplicationNo. 428197 filed on 10/27/1999US Classes:264/651, Removal of liquid component or carrier through porous or absorbent mold surface (e.g., slip casting, etc.)264/43, Including vitrification or firing264/655, With article cutting, punching, or grinding264/660, With drying of shaped article or preform using nonsintering heat264/669Utilizing binder to add green strength to preformExaminersPrimary: Derrington, JamesForeign Patent References
International ClassC04B 038/08AbstractA ceramic composition is provided to insulate ceramic matrix composites under high temperature, high heat flux environments. The composition comprises a plurality of hollow oxide-based spheres of various dimensions, a phosphate binder, and at least one oxide filler powder, whereby the phosphate binder partially fills gaps between the spheres and the filler powders. The spheres are situated in the phosphate binder and the filler powders such that each sphere is in contact with at least one other sphere. The spheres may be any combination of Mullite spheres, Alumina spheres, or stabilized Zirconia spheres. The filler powder may be any combination of Alumina, Mullite, Ceria, or Hafnia. Preferably, the phosphate binder is Aluminum Ortho-Phosphate. A method of manufacturing the ceramic insulating composition and its application to CMC substrates are also provided.Field of SearchRemoval of liquid component or carrier through porous or absorbent mold surface (e.g., slip casting, etc.)With article cutting, punching, or grinding With drying of shaped article or preform using nonsintering heat Utilizing binder to add green strength to preform Including vitrification or firing Pore-forming | |
