General Electric Company

Rensselaer Polytechnic Institute

Chek Beng Ng

Farshad Ghasripoor

Don Mark Lipkin

Raymond Edward Chupp

Jeffrey Reid Thyssen

Dalero Winston Berkeley

Yuk-Chiu Lau

Dennis Michael Gray

Richard W Siegel

Linda S Schadler

Process of brazing an alumina-coated honeycomb and fiber metal material to a substrate, in which a mask material is applied to a portion of the honeycomb and fiber metal prior to deposition of the AlO, and the mask material is removed after deposition and prior to brazing to the substrate.

Brazing of alumina coated honeycomb and fiber metal

Oxidation resistant sealant system comprising a honeycomb component coated with an aluminum oxide layer.

Aluminum oxide coated honeycomb for S2S and S3S sealing system with extended oxidation life

Polymer resins incorporating nanoparticles having a particle size in the range of 1-100 nm and a narrow particle size distribution have improved tensile properties and scratch resistance.

Nanoparticle-filled polymers

An abradable coating composition for use on shrouds in gas turbine engines (or other hot gas path metal components exposed to high temperatures) containing an initial porous coating phase created by adding a &ldquo;fugitive polymer&rdquo; (such as polyester or polyimide) to the base metal alloy, together with a brittle intermetallic phase such as &bgr;-NiAl that serves to increase the brittle nature of the metal matrix, thereby increasing the abradability of the coating at elevated temperatures, and to improve the oxidation resistance of the coating at elevated temperatures. Coatings having about 12 wt % polyester has been found to exhibit excellent abradability for applications involving turbine shroud coatings. An abradable coating thickness in the range of between 40 and 60 ml provides the best performance for turbine shrouds exposed to gas temperatures between 1380&deg; F. and 1850&deg; F. Abradable coatings in accordance with the invention can be used for new metal components or to repair existing equipment.

High temperature abradable coating for turbine shrouds without bucket tipping

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Albany, NY, United States of America

Chek Beng Ng