Process for coating with ceramic vaporizing materials

US6168833A · kind A · utility

Assignee

• DLR Deutsche Forschungsanstalt fur Luft-und Raumfahrt e.V. · DE

Inventors

• Uwe Leushake · Leverkusen, DE
• Walter Luxem · Troisdorf, DE
• Claus Kroder · Sankt Augustin, DE
• Wolf Zimmermann · Erbach, DE

Key dates

• Filing date: Feb 16, 1999
• Grant date: Jan 2, 2001
• Expiry date: Feb 16, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T50/60
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A process for coating an object with ceramic material vaporized from an ingot of the ceramic material. The process comprises the steps of (a) evaporating the material by melting the surface of the ingot with an intense heat source; and (b) depositing the evaporated material upon the object as a coating. The ingot comprises an unsintered mixture of at least two powder fractions of at least 50% to 90% by volume of a coarse-grained powder and 10% to 50% by volume of a fine-grained powder. The average particle diameter, d.sub.50, of the fine-grained powder is at most one third the average particle diameter of the coarse-grained powder. The powders are metal oxides, transition metal oxides, nitrides, carbides, borides, suicides or combinations thereof