United Technologies Corporation

Rtx Corporation

Raytheon Technologies Corporation

Hamilton Sundstrand Corporation

Carrier Corporation

Tania Bhatia Kashyap

Wayde R Schmidt

Gabriel L Suciu

Brian D Merry

Michael G McCaffrey

Paul Sheedy

Xia Tang

Daniel G Goberman

James Thompson Beals

Daniel Bernard Kupratis

Mark F Zelesky

Thomas N Slavens

Changsheng Guo

David C Jarmon

Kathryn S Read

Shahram Amini

Jeffrey Leon

Kevin L Rugg

Arthur W Utay

Paul F Croteau

John G Smeggil

Richard Wesley Jackson

Jeffrey R Levine

Neal Magdefrau

Olivier H Sudre

Douglas Michael Berczik

Eleanor D Kaufman

Andi M Limarga

Mary Colby

Amarnath Ramlogan

William F Werkheiser

Harry Edwin Eaton, Jr

Mark T Ucasz

Treese Hugener-Campbell

Richard N Allen

Brian J Burke

Gregory Anselmi

Nitin Garg

Daniel C Nadeau

John H Shaw

Christina E Botnick

Cristal Chan

Dustin Frame

Gerald M Mace

Owen B Donahue, Jr

Santiago Orellana

Mark A Hermann

John David Forbes

Dianbo Li

David Dwyer Whittle

Derek A Brigham

Erik A Mikalsen

A ceramic article includes a ceramic matrix composite that has a porous reinforcement structure and a ceramic matrix within pores of the porous reinforcement structure. The ceramic matrix composite includes a surface zone comprised of an exterior surface of the ceramic matrix composite and pores that extend from the exterior surface into the ceramic matrix composite. A glaze material seals the surface zone within the pores of the surface zone and on the exterior surface of the surface zone as an exterior glaze layer on the ceramic matrix composite. The glaze material is a glass or glass-ceramic material. The ceramic matrix composite includes an interior zone under the surface zone, and the interior zone is free of any of the glaze material and has a greater porosity than the surface zone.

Method for fabricating a ceramic material

An article includes a ceramic-based substrate and a barrier layer on the ceramic-based substrate. The barrier layer includes a matrix of barium-magnesium alumino-silicate or SiO, a dispersion of silicon oxycarbide particles in the matrix, and a dispersion of particles, of the other of barium-magnesium alumino-silicate or SiO, in the matrix.

Silicon oxycarbide environmental barrier coating

A method for coating a ceramic matrix composite substrate with an environmental barrier coating includes the steps of: treating a surface of a ceramic matrix composite substrate to adjust wettability of the surface; and applying an aqueous slurry-based environmental barrier coating to the surface. The treating step can be a plasma treatment to remove organic contaminants, and can also be a treatment to modify oxidative state of the surface. The treatment can produce a surface for treatment that is hydrophilic and has a contact angle with aqueous-slurry coating materials of less than 40 degrees.

Surface treatment for aqueous slurry-based environmental barrier coating

In a method for repairing a coated article, the article has: a ceramic matrix composite (CMC) substrate; and a coating system having a plurality of layers. A damage site at least partially penetrates at least one of the layers. The method includes: applying a slurry of a repair material to the damage site for repairing a first of the penetrated layers; and after the applying, heating the repair material with a plasma torch.

Coating repair for ceramic matrix composite (CMC) substrates

An article includes a silicon oxycarbide-based layer that has Si, O, and C in a covalently bonded network. The silicon oxycarbide-based layer has first and second opposed surfaces. A calcium-magnesium alumino-silicate-based layer is interfaced with the first surface of the silicon oxycarbide-based layer.

Silicon oxycarbide-based environmental barrier coating

A ceramic matrix composite includes a plurality of ceramic fibers and an interface coating disposed on the plurality of ceramic fibers. The interface coating includes a carbon-based layer disposed on each ceramic fiber of the plurality of ceramic fibers and a boron-nitride based layer disposed on the first carbon-based layer. The ceramic matrix composite also includes a ceramic matrix surrounding the plurality of ceramic fibers. A ceramic matrix composite and a method of forming a ceramic matrix composite component are also disclosed.

Ceramic component

An environmental barrier coating, comprising a substrate containing silicon; an environmental barrier layer applied to the substrate; the environmental barrier layer comprising an oxide matrix; an oxidant getter phase interspersed throughout the oxide matrix; and a self-healing phase interspersed throughout the oxide matrix.

Self-healing environmental barrier coating

A process of coating a substrate containing silicon with an environmental barrier coating, comprising altering a surface of the substrate and applying an environmental barrier layer to the surface of the substrate.

Chemical and topological surface modification to enhance coating adhesion and compatibility

A cover plate for a rotor assembly is disclosed. In various embodiments, the cover plate includes an annular member having a radially inner portion and a radially outer portion with respect to a longitudinal axis, the radially inner portion including an aft face and an angled forward face, the angled forward face defining a forward face angle with respect to a cylindrical plane that is coaxial with the longitudinal axis, the face angle having a value that is greater than or equal to fifty degrees; a first tab and a second tab disposed proximate the radially inner portion of the annular member; and a slot disposed between the first tab and the second tab.

High pressure turbine rear side plate

A method of fabricating a ceramic article includes providing a porous body that includes a plurality of fiber bundles that has an intra-bundle porosity and an inter-bundle porosity, infiltrating the intra-bundle porosity and the inter-bundle porosity with a mixture of particles in a liquid carrier, the particles having an average size selected with respect to at least the intra-bundle porosity, removing the liquid carrier from the porous body to deposit the particles in the intra-bundle porosity and in the inter-bundle porosity, infiltrating a preceramic polymer into a remaining intra-bundle porosity and a remaining inter-bundle porosity, and thermally converting the preceramic polymer to a ceramic material.

Ceramic article and method therefor using particle infiltration and preceramic polymer infiltration

A ceramic article includes a ceramic matrix composite that has a porous reinforcement structure and a ceramic matrix within pores of the porous reinforcement structure. The ceramic matrix composite includes a surface zone and a glaze material within pores of the surface zone and on an exterior side of the surface zone as an exterior glaze layer.

A method of fabricating a ceramic matrix composite includes infiltrating pores of a porous structure with a preceramic matrix polymer using a composite molding technique. The porous structure includes fibers and an exposed carbon coating on the fibers. The preceramic matrix polymer wets the exposed carbon coating. The preceramic matrix polymer is then pyrolyzed to convert the preceramic matrix polymer to a ceramic matrix.

Method for ceramic matrix composite with carbon coating for wetting

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West Hartford, CT, United States of America

Tania Bhatia Kashyap