Inventors:
Thomas J. Radzavich - Higganum CT
Donald G. Nordstrom - Meriden CT
Keith D. Sheffler - Wethersfield CT
Assignee:
United Technologies Corporation - Hartford CT
International Classification:
B05D 308
Abstract:
This invention relates to the application of plasma sprayed coatings to the surface of components which have small holes therein, such as hollow, air cooled blades or vanes used in turbine engines. Coating material is prevented from depositing on the wall surface of the holes by the presence of fugitive plugs in the holes during the coating process. The plugs are removed after the coating has been applied, resulting in the holes being open and unobstructed.