Enhanced thermal barrier coating system

US5419971A · kind A · utility

Assignee

• General Electric Company · US

Inventors

• David W. Skelly · Burnt Hills, US
• Bangalore Aswatha Nagaraj · Sharonville, US
• David J. Wortman · Niskayuna, US
• David V. Rigney · Cincinnati, US
• Seetha Ramaiah Mannava · Cincinnati, US
• Rudolfo Viguie · Cincinnati, US
• Robert William Bruce · Loveland, US
• Warren Arthur Nelson · Schenectady, US
• Curtis Alan Johnson · Schenectady, US
• Bhupendra K. Gupta · Cincinnati, US

Key dates

• Filing date: Mar 3, 1993
• Grant date: May 30, 1995
• Expiry date: Mar 3, 2013

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24612
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

An article having a substrate is protected by a thermal barrier coating system. An interfacial layer contacts the upper surface of the substrate. The interfacial layer may comprise a bond coat only, or a bond coat and an overlay coat. The interfacial layer has on its upper surface a preselected, controllable pattern of three-dimensional features, such as grooves in a parallel array or in two angularly offset arrays. The features are formed by an ablation process using an ultraviolet laser such as an excimer laser. A ceramic thermal barrier coating is deposited over the pattern of features on the upper surface of the interfacial layer.