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Alusil

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Alusil as a hypereutectic aluminium-silicon alloy (AlSi17Cu4Mg) contains approximately 70% aluminium and 30% silicon.<ref name=KSPG-AG>Template:Citation/core{{#if:|}}</ref><ref name=finishing.com>Template:Citation/core{{#if:|}}</ref> This alloy was created in 1927 by Schweizer & Fehrenbach<ref name=Rheinmetall>Template:Citation/core{{#if:|}}</ref> of Baden-Baden Germany and further developed by Kolbenschmidt.<ref name=finishing.com/>

The Alusil aluminium alloy is commonly used to make linerless aluminium alloy engine blocks.<ref>Template:Citation/core{{#if:|}}</ref> Alusil, when etched, will expose a very hard silicon precipitate. The silicon surface is porous enough to hold oil, and is an excellent bearing surface. BMW switched from Nikasil-coated cylinder walls to Alusil in 1996 to eliminate the corrosion problems caused through the use of petrol/gasoline containing sulfur.

Engines using Alusil include:

See also

External links