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. 05, 2008
Filed:
Jan. 21, 2005
Irene Spitsberg, Loveland, OH (US);
Christine Govern, Cincinnati, OH (US);
Bangalore Aswatha Nagaraj, West Chester, OH (US);
Brian Thomas Hazel, West Chester, OH (US);
David Joseph Mitchell, Huntington Beach, CA (US);
Irene Spitsberg, Loveland, OH (US);
Christine Govern, Cincinnati, OH (US);
Bangalore Aswatha Nagaraj, West Chester, OH (US);
Brian Thomas Hazel, West Chester, OH (US);
David Joseph Mitchell, Huntington Beach, CA (US);
General Electric Company, Schenectady, NY (US);
Abstract
An article comprising a substrate formed of a silicon-comprising material, such as an article exposed to the hostile thermal environment of a gas turbine engine. The article further comprises an environmental barrier layer, e.g., an alkaline earth metal aluminosilicate, and a top coat comprising hafnia stabilized with from about 0.5 mole % to about 10 mole % of an oxide of a metal selected from the group consisting of magnesium, calcium, scandium, yttrium, and lanthanide metals, and mixtures thereof. The article optionally comprises a transition layer between the environmental barrier layer and the top coat. A method for preparing a thermal/environmental barrier coating on a substrate formed of a silicon-comprising material is also disclosed.