Coating consisting of hypereutectic aluminum/silicon alloy and/or an aluminum/silicon composite material

US6221504A · kind A · utility

Assignee

• Daimlerchrysler AG · US

Inventors

• Harald Pfeffinger · Tiefenbronn, DE
• Micheal Voit · Waiblingen, DE
• Tilman Haug · Landau in der Pfalz, DE
• Patrick Izquierdo · Ulm, DE
• Herbert Gasthuber · Ulm, DE
• Oliver Storz · Sleaford, GB
• Axel Heuberger · Wildberg, DE
• Franz Rueckert · Esslingen am Neckar, DE
• Peter Stocker · Murrhardt, DE
• Helmut Proefrock · Leutenbach, DE

Key dates

• Filing date: Aug 3, 1998
• Grant date: Apr 24, 2001
• Expiry date: Aug 3, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12757
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A tribological coating made of a copper-free highly hypereutectic aluminum/silicon alloy and/or of a copper-free aluminum/silicon composite material composed such that fine silicon primary crystals and/or silicon particles, intermetallic phases, and oxides form as hard particles during the production of the layers in the atmospheric thermal spraying method and/or are anchored in the structure. The surface of the coating can be machined economically by short-chipping using conventional tools, so that additional alloy elements such as copper for forming additional intermetallic phases such as Al.sub.2 Cu can be eliminated. This is significant because conventional AlSi cylinder liners in reciprocating engines pose problems in conjunction with certain fuels because of their copper content.