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
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Abradable hybrid material, particularly for seal elements in gas turbines, and manufacturing method thereof
TL;DR: A hybrid CMC -ceramic foam abradable material is proposed in this article, where a CMC structure is composed of a solid base portion and a honeycomb pattern projecting from at least one face and having hollow cells.
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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.
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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
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