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:
Dec. 01, 2020
Filed:
Sep. 25, 2018
Rolls-royce Corporation, Indianapolis, IN (US);
Rolls-royce Plc, London, GB;
Stephanie Gong, Indianapolis, IN (US);
Taylor K. Blair, Indianapolis, IN (US);
Ngunjoh Lawrence Ndamka, Derby, GB;
Li Li, Carmel, IN (US);
Sunny Chang, Carmel, IN (US);
Ann Bolcavage, Indianapolis, IN (US);
Rolls-Royce Corporation, Indianapolis, IN (US);
Rolls-Royce PLC, London, GB;
Abstract
An article includes a substrate, a bond coat on the substrate, and a multilayer environmental barrier coating (EBC) on the bond coat. The multilayer EBC includes a first EBC layer defining a first thickness and a second EBC layer defining a second thickness. The first EBC layer includes a first rare earth disilicate and a first concentration of a sintering aid that includes alumina. The second EBC layer includes a second rare earth disilicate and a second concentration of the sintering aid that includes alumina, less than the first concentration of the sintering aid.