Robust window for infrared energy

US7978402B2 · kind B2 · utility

Assignee

• General Electric Company · US

Inventors

• Sean Michael Sweeney · Schenectady, US
• Timothy James Yosenick · Glenville, US
• Dalong Zhong · Shanghai, CN
• Milivoj Konstantin Brun · Ballston Lake, US
• Sergio Paulo Martins Loureiro · Saratoga Springs, US
• Venkat Subramaniam Venkataramani · Clifton Park, US
• Mohan Manoharan · Bengaluru, IN

Key dates

• Filing date: Jun 28, 2007
• Grant date: Jul 12, 2011
• Expiry date: Sep 26, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2111/805
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Articles transparent to infrared radiation and resistant to impact and wear are provided. The article comprises a substrate and a composite coating disposed over the substrate and extending from an interface with the substrate to an external surface. The composite coating comprises a first phase and a second phase. The second phase has a higher resistance to erosive wear than the first phase. The coating comprises a compositional gradient proceeding from a first composition at the interface of the coating with the substrate to a second composition at the external surface, the first composition comprising a higher concentration of the first phase than that of the second composition.