Coatings from rough-spaced aluminum / silicon alloys or aluminum / silicon composites

摘要

The present invention relates to a copper-free eutectic aluminum / silicon alloy or a copper-free aluminum / silicon composite so that oxides adhere to the structure as fine silicon main crystals or silicon particles, intermetallics, hard particles during layer formation in an atmospheric thermal spraying method. Relates to the friction coating produced. Due to the intermetallic phase and oxides such as MgSi ₂ , the surface of the coating can be economically machined by short-chipping using traditional tools, such as copper, which forms additional intermetallic phases such as Al ₂ Cu. Additional alloying components can be removed. This is particularly useful when these layers are used as cylinder liners in reciprocating engines, because traditional AlSi liners present some fuel problems due to the copper content.