Method for feeding particles of a coating material into a thermal spraying process

US8252384B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Jens Dahl Jensen · Berlin, DE
• Jens Klingemann · Berlin, DE
• Ursus Krüger · Berlin, DE
• Daniel Körtvelyessy · Berlin, DE
• Volkmar Lüthen · Berlin, DE
• Ralph Reiche · Berlin, DE
• Oliver Stier · Berlin, DE

Key dates

• Filing date: Sep 27, 2007
• Grant date: Aug 28, 2012
• Expiry date: Oct 23, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C23C4/12
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In a method particles in a thermal spraying process are entrained by a carrier gas stream and deposited on a component to be coated. The particles are dispersed in a liquid or solid additive before being introduced into a supply line which issues into the thermal spraying apparatus, the additive, after leaving the supply line, being transferred into the gaseous state in the carrier gas stream. A liquid additive evaporates or a solid additive is sublimated, whereby the particles in the carrier gas stream are separated. The dispersal of the particles in the additive simplifies an exact metering and prevents the particles from forming lumps, so that improved layers can be deposited by virtue of an improved homogeneity of the carrier gas stream. As the additive has been transferred into the gaseous state, it is not deposited in the layer.