United Technologies Corporation

Rtx Corporation

Raytheon Technologies Corporation

Imelda P Smyth

Xia Tang

Douglas Michael Berczik

Sarah A Frith

Christopher W Strock

Richard Wesley Jackson, Iii

Stuart Alan Sanders

William J Joost

R Wesley Jackson

Kara J Bridges

A coated article () includes a substrate () and a coating () on the substrate. The coating includes at least a first layer (). The first layer has: a matrix (); and a filler () at 2.0% to 40% by volume in the first layer. The first layer is selected from alkaline earth or transition metal (M) tungstates (MWO4); alkaline earth molybdates (MMoO); rare earth (RE) phosphates (REPO); and combinations thereof.

Dislocator chemistries for turbine abradable or machinable coating systems

An article has a substrate and a layer atop the substrate. The layer has: a matrix comprising at least one of hafnium silicate (HfSiO) and ytterbium disilicate (YbSiO); and barium magnesium alumino silicate (BMAS).

Protective coating for ceramic matrix composites

A method of fabricating a coating includes providing a ceramic matrix composite that includes SiC fibers disposed in a SiC matrix, depositing a base slurry on the ceramic matrix composite, wherein the base slurry contains powders of a metal oxide, at least one of silicon carbide, silicon nitride, or free silicon, and barium-magnesium-aluminosilicate in a first carrier fluid, drying the deposited base slurry to produce a base green layer, depositing a transition slurry on the base green layer, wherein the transition slurry contains powders of a metal oxide, at least one of silicon carbide, silicon nitride, or free silicon, at least one of zirconium carbide, zirconium nitride, or zirconium oxide, and barium-magnesium-aluminosilicate in a second carrier fluid, drying the deposited transition slurry to produce a transition green layer, and forming a consolidated coating on the ceramic matrix composite by heating the base green layer and the at least one transition green layer to cause chemical reactions that convert the powders to metal-silicon-oxygen rich phase and metal-zirconium-oxygen rich phase.

Method for fabricating an environmental barrier coating on a ceramic matrix composite

A blade outer air seal has at least one internal surface and a layer atop the at least one internal surface. The layer has: a matrix comprising at least one of hafnium silicate (HfSiO) and zirconium silicate (ZrSiO), ytterbium disilicate (YbSiO); and barium magnesium alumino silicate (BMAS) or other alkaline earth aluminosilicate.

Machinable coatings fabricated by slurry methods for use on ceramic matrix composites

A method of fabricating a ceramic matrix composite includes generating a stream of vaporized precursor and, optionally, a vaporized rare earth element. The vaporized precursor is a precursor of either silicon carbide or silicon nitride. The stream flows for one or more periods of time through a chamber that contains a fibrous structure such that the fibrous structure is exposed to the stream. The fibrous structure initially contains no silicon carbide matrix or silicon nitride matrix. The vaporized precursor deposits over the period of time on the fibrous structure as a substantially fully dense ceramic matrix of either the silicon carbide or the silicon nitride. For at least a portion of the period of time, the vaporized rare earth element is included in the stream such that the ceramic matrix deposited during that time includes dispersed rare earth element.

Method of fabricating a ceramic matrix composite

Disclosed is a method for fabricating a ceramic material from a preceramic polymer material. The method includes providing a preceramic polymer material that has a preceramic polymer and an electromagnetic radiation-responsive component. The electromagnetic radiation-responsive component is selected from cobalt, titanium, zirconium, hafnium, tantalum, tungsten, rhenium, and combinations thereof. An electromagnetic radiation is applied to the preceramic polymer material. The electromagnetic radiation interacts with the electromagnetic radiation-responsive component to generate heat that converts the preceramic polymer to a ceramic material.

Method for pyrolyzing preceramic polymer material using electromagnetic radiation

Disclosed is a method for fabricating a ceramic material from a preceramic polymer material. The method includes providing a preceramic polymer material that has a preceramic polymer and an electromagnetic radiation-responsive component. The electromagnetic radiation-responsive component is selected from boron-containing compounds, cobalt, titanium, zirconium, hafnium, tantalum, tungsten, rhenium, nitrides of aluminum, nitrides of titanium, nitrides of zirconium, nitrides of hafnium, nitrides of tantalum, nitrides of tungsten, nitrides of rhenium, carbides of aluminum, carbides of titanium, carbides of zirconium, carbides of hafnium, carbides of tantalum, carbides of tungsten, carbides of rhenium and combinations thereof. An electromagnetic radiation is applied to the preceramic polymer material. The electromagnetic radiation interacts with the electromagnetic radiation-responsive component to generate heat that converts the preceramic polymer to a ceramic material.

A process for applying an interface coating includes the step of applying an interface coating material upon at least one surface of a fiber-based substrate. The interface coating material may be composed of a sizing agent, a ceramic powder and optionally at least one of the following agents: a dispersing agent, a deflocculating agent or a surface wetting agent.

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North Palm Beach, FL, United States of America

Imelda P Smyth