United Technologies Corporation

Gerard A Sileo

John W Appleby, Jr

Charles G Davis

Frederick Clell Walden

Harold W Pettit, Jr

William J Woodard

Stephen T Narsavage

Timothy A Twigg

Francis X Alent

Charles C McComas

Herbert R Barringer

Michael J Patry

A composite ceramic coating having abrasive properties for application to a metallic substrate is provided which includes a ceramic matrix and a plurality of ceramic abrasive particles disposed within said ceramic matrix. The abrasive particles have a shear strength substantially greater than that of the ceramic matrix and possess an angular geometry. A method for providing an abrasive coating on a metallic article is also provided.

Abrasive/abradable gas path seal system

Method for providing an abrasive coating on a metallic article

A gas turbine abradable seal is prepared by plasma spraying an oxidation resistant metallic material and boron nitride. The resultant structure comprises a metallic matrix encompassing a lubricating amount of boron nitride, with porosity of less than about 15 percent and a fabricated surface roughness of less than about 600 microinches. The reduced surface roughness and substantially reduced permeability of this seal provide substantially enhanced engine efficiency, and improved durability.

Method for producing an abradable seal

Plasma sprayed abradable seals for gas turbine engines

Gas turbine engine coatings must often be removed during engine maintenance and repair. The techniques utilized to accomplish this task, machining, chemical stripping, machining followed by chemical stripping, or grit blasting, frequently result in component damage or destruction. Liquid jet erosion can be utilized to remove seals, coatings, or portions thereof without damaging the engine hardware.

Liquid jet removal of plasma sprayed and sintered

Growing community of inventors

Jupiter, FL, United States of America

Gerard A Sileo