The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 24, 2001
Filed:
May. 19, 1999
David S Rickerby, Derby, GB;
Other;
Abstract
A metallic article (,) comprises a bond coating (,) on the metallic article (,) and a ceramic thermal barrier coating (,) on the bond coating (,). The ceramic thermal barrier coating (,) comprises a plurality of columnar grains (,) extending substantially perpendicular to the surface of the metallic article (,). The ceramic thermal barrier coating (,) has an inner portion (,), a transition portion (,) and an outer portion (,). Each columnar grain (,) has a substantially constant cross-sectional area throughout its length in the outer portion (,), has smooth surfaces and there are distinct uniform gaps (,) between columnar grains to minimize the stress/strain in the columnar grains (,) and/or to minimize the stress/strain between adjacent columnar grains (,) and thereby increases the resistance to spallation of the ceramic thermal barrier coating. The columnar grains (,) are produced by controlling the evaporation rate of the ceramic, the temperature and speed of rotation of the article (,).