Patent
Use of high temperature insulation for ceramic matrix composites in gas turbines
TLDR
In this article, a ceramic composition for insulating components, made of ceramic matrix composites, of gas turbines is provided, which comprises a plurality of hollow oxide-based spheres of various dimensions, a phosphate binder, and at least one oxide filler powder, whereby the binder partially fills gaps between the spheres and the filler powders.Abstract:
A ceramic composition for insulating components, made of ceramic matrix composites, of gas turbines is provided. 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 and the arrangement of spheres is such that the composition is dimensionally stable and chemically stable at a temperature of approximately 1600 °C. A stationary vane of a gas turbine comprising the composition of the present invention bonded to the outer surface of the vane is provided. A combustor comprising the composition bonded to the inner surface of the combustor is provided. A transition duct comprising the insulating coating bonded to the inner surface of the transition is provided. Because of abradable properties of the composition, a gas turbine blade tip seal comprising the composition also is provided. The composition is bonded to the inside surface of a shroud so that a blade tip carves grooves in the composition so as to create a customized seal for the turbine blade tip.read more
Citations
More filters
Patent
High temperature insulation utilizing zirconia-hafnia
TL;DR: In this article, a monoclinic zirconia-hafnia is used as a filler powder to provide a predetermined phase transition temperature to minimize undesired phase changes during high temperature use of the material.
Patent
Method of manufacturing a hybrid structure
TL;DR: In this paper, a hybrid structure is constructed by casting the insulating material to a first thickness required for effective casting but in excess of a desired second thickness for use of the hybrid structure.
Patent
Hybrid bucket dovetail pocket design for mechanical retainment
TL;DR: In this article, a method for mechanically attaching a composite or polymeric material to a bucket in a radial airfoil includes creating at least one dovetail shape pocket in the bucket having inclined interfaces with respect to the radial air-foil, and filling the pocket with the composite material.
Patent
Method of Forming a Turbine Engine Component Having a Vapor Resistant Layer
Jay E. Lane,Gary B. Merrill +1 more
TL;DR: In this article, a method of forming a turbine component that includes a ceramic matrix composite-ceramic insulation composite with a vapor resistant layer is disclosed, where an inner tool and an outer tool are provided, wherein the inner and outer tools define a mold for forming turbine component.
Patent
Joining mechanism with stem tension and interlocked compression ring
TL;DR: In this paper, a ring element is formed of a material that shrinks relative to the stem by sintering, and the ring element exerts an inward force against the non-threaded contact surface at an angle that creates axial tension in the stem, pulling the second part against the first part.
References
More filters
Patent
Ceramic-metal composites
TL;DR: In this article, a reinforced composite structure consisting of a heat resistant chemically-bonded layer of a ceramic composition mechanically attached to a metallic substrate is presented, which includes a metallic anchoring matrix characterized by a plurality of spatially and cooperably arranged reinforcing elements.
Patent
Abradable ceramic seal and method of making same
TL;DR: An abradable ceramic seal coating on at least one of a pair of members having relative rotational movement is described in this paper, the coating being formed of stabilized zirconia which is codeposited with a thermally decomposable organic powder.
Patent
Thermal spray powders for abradable coatings, abradable coatings containing solid lubricants and methods of fabricating abradable coatings
TL;DR: Abradable coatings formed by thermal spraying the powders abrade readily to form abradable seals as mentioned in this paper, and have a metal, metal alloy, or ceramic matrix with discrete inclusions of solid lubricant and plastic.
Patent
Graded metal-to-ceramic structure for high temperature abradable seal applications and a method of producing said
TL;DR: Abradable seal composite as mentioned in this paper is an abradable composite with a porous, abrasionable ceramic surface layer which is resistant to high temperature oxidation and a metallic bottom layer capable of being bonded to a metallic substrate.
Patent
Casing for a thermal turbomachine having a heat-insulating liner
TL;DR: A thermal turbomachine casing having a multilayer heat insulation liner including a metallic bond coat in direct contact with the casing wall, a ceramic heat insulation layer bonded to the bond coat, and preferably an abradable coating in the form of a porous, predominantly metallic, top layer bond to the ceramic layer is described in this paper.