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:
Feb. 22, 2005
Filed:
Dec. 30, 2003
Mark Daniel Gorman, West Chester, OH (US);
Irene Spitsberg, Loveland, OH (US);
Brett Allen Boutwell, Liberty Township, OH (US);
Ramgopal Darolia, West Chester, OH (US);
Robert William Bruce, Loveland, OH (US);
Venkat Subramanian Venkataramani, Clifton Park, NY (US);
Anthony Mark Thompson, Niskayuna, NY (US);
Antonio Mogro-campera, Niskayuna, NY (US);
Mark Daniel Gorman, West Chester, OH (US);
Irene Spitsberg, Loveland, OH (US);
Brett Allen Boutwell, Liberty Township, OH (US);
Ramgopal Darolia, West Chester, OH (US);
Robert William Bruce, Loveland, OH (US);
Venkat Subramanian Venkataramani, Clifton Park, NY (US);
Anthony Mark Thompson, Niskayuna, NY (US);
Antonio Mogro-Campera, Niskayuna, NY (US);
General Electric Company, Schenectady, NY (US);
Abstract
Zirconia-containing ceramic compositions having a c/a ratio of the zirconia lattice in the range of from about 1.005 to about 1.016. These compositions comprise a stabilizing amount up to about 10 mole % of the composition of a stabilizer component which comprises: (1) a first metal oxide selected from the group consisting of yttria, calcia, ceria, scandia, magnesia, india and mixtures thereof in an amount of from about 1.5 to about 6 mole % of the composition of; (2) a second metal oxide selected from the group consisting of lanthana, neodymia and mixtures thereof in an amount of from about 0.5 to about 4 mole % of the composition; and (3) optionally ytterbia in an amount of from about 0.5 to about 4 mole % of the composition. These compositions further comprise hafnia in an amount of from about 0.5 to about 15 mole % of the composition; and optionally tantala in an amount of from about 0.5 to about 1.5 mole % of the composition. These compositions are useful in preparing thermal barrier coatings having a balance of reduced thermal conductivity with good producibility, spallation resistance and erosion/impact resistance for an underlying substrate of articles that operate at, or are exposed to, high temperatures.