General Electric Company

United Technologies Corporation

Brian Keith Flandermeyer

Suresh Subramanian

James Dale Steibel

Douglas Melton Carper

John Frederick Ackerman

Andrew Jay Skoog

Jane Ann Murphy

Matthew Bernard Buczek

Michael A Kmetz

Israel S Jacobs

Kathleen E Sinnamon

Daniel G Backman

Erica L Prevost

Erica Prevost

An article includes a ceramic matrix composite substrate with a heat-exposure surface and a monocoating disposed directly on the heat-exposure surface. The monocoating includes vitreous glass to seal the ceramic matrix composite from the surrounding environment.

Article having vitreous monocoating

A composite article includes a substrate and a multilayer coating on the substrate. The multilayer coating includes an inner layer near the substrate, and outermost layer on the inner layer, and an intermediate layer between the inner layer and the outermost layer. The inner layer and outermost layer are boron-containing materials, and the intermediate layer is a silicon-containing ceramic material.

Composite article and method therefor

The present invention is a ceramic matrix composite turbine engine component, wherein the component has a direction of maximum tensile stress during normal engine operation. The component comprises a plurality of biased ceramic plies, wherein each biased ply comprises ceramic fiber tows, the tows being woven in a first warp direction and a second weft direction, the second weft direction lying at a preselected angular orientation with respect to the first warp direction, wherein a greater number of tows are woven in the first warp direction than in the second weft direction, and wherein a number of tows in the second weft direction allows the biased plies to maintain their structural integrity when handled. The plurality of biased plies are laid up in a preselected arrangement to form the component, and a preselected number of the plurality of biased plies are oriented such that the orientation of the first warp direction of the preselected number of biased plies lie about in the direction of maximum tensile stress during normal engine operation. A coating is applied to the plurality of biased plies. The coating is selected from the group consisting of BN, SiC, and combinations thereof. A ceramic matrix material lies in interstitial regions between the tows of each biased ply and the interstitial region between the biased plies.

Use of biased fabric to improve properties of SiC/SiC ceramic composites for turbine engine components

A method for making a ceramic matrix composite turbine engine component, wherein the method includes providing a plurality of biased ceramic plies, wherein each biased ply comprises ceramic fiber tows, the tows being woven in a first warp direction and a second weft direction, the second weft direction lying at a preselected angular orientation with respect to the first warp direction, wherein a greater number of tows are woven in the first warp direction than in the second weft direction. The plurality of biased plies are laid up in a preselected arrangement to form the component, and a preselected number of the plurality of biased plies are oriented such that the orientation of the first warp direction of the plies lie about in the direction of maximum tensile stress during normal engine operation. A coating is applied to the plurality of biased plies. The coated component preform is then densified.

A coating is prepared by providing a plurality of metallic flake particles, depositing a surface-protective applied layer on the particle surfaces to form protected particles, and mixing the protected particles with a binder precursor to form a coating mixture. The coating mixture is applied to a substrate. The surface-protective applied layer is preferably silica, which is deposited by a sol-gel process from a tetraethyl orthosilicate solution.

Coating system containing surface-protected metallic flake particles, and its preparation

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Rocky Hill, CT, United States of America

Brian Keith Flandermeyer