United Technologies Corporation

Stephen T Narsavage

John W Appleby, Jr

Charles G Davis

Gerard A Sileo

Francis X Alent

Raymond W Vine

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

A high pressure, low porosity wet seal for a substrate in a fuel cell in which the seal is made up of a granular material having a particle size varying from 10 to 0.1 microns in size bonded together with polytetrafluoroethylene to prevent leakage of the gaseous fuel or oxidant from the cell.

High pressure-low porosity wet seal

Growing community of inventors

Jupiter, FL, United States of America

Stephen T Narsavage