Autopedia
Advertisement

Alusil as a hypereutectic aluminium-silicon alloy (AlSi17Cu4Mg) contains approximately 70% aluminium and 30% silicon.[1][2] This alloy was created in 1927 by Schweizer & Fehrenbach[3] of Baden-Baden Germany and further developed by Kolbenschmidt.[2]

The Alusil aluminium alloy is commonly used to make linerless aluminium alloy engine blocks.[4] 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[]

  • Hypereutectic Pistons

External links[]

  1. 1.0 1.1 1.2 "ALUSIL - Cylinder Blocks for the new Audi V6 and V8 SI engines" (PDF). KS Aluminium-Technologie AG. KSPG-AG.com. http://www.kspg-ag.com/pdfdoc/kspg_produktbroschueren/a_audi_zkg_e.pdf. Retrieved 13 January 2010. 
  2. 2.0 2.1 "What is Alusil coating?". finishing dot com. finishing.com. http://www.finishing.com/3600-3799/3605.shtml. Retrieved 13 January 2010. 
  3. 3.0 3.1 3.2 "Rheinmetall's tradition of automotive excellence". Rheinmetall Defence. Rheinmetall-Detec.de. January 2006. http://www.rheinmetall-detec.de/index.php?lang=3&fid=3397. Retrieved 13 January 2010. 
  4. "High-performance engine blocks for tomorrow’s challenges". Kolbenschmidt Pierburg AG. KSPG-AG.com. 12 September 2005. http://www.kspg-ag.de/index.php?lang=2&fid=444#11. Retrieved 13 January 2010. 
  5. 5.0 5.1 "KS Aluminium-Technologie: engine blocks for the new Audi A6". Rheinmetall AG. Rheinmetall.de. August 2004. http://www.rheinmetall.de/index.php?fid=1364&qid=&qpage=5&lang=3. Retrieved 13 January 2010. 
  6. "High-tech products for the new and advanced BMW V12". Kolbenschmidt Pierburg AG. KSPG-AG.com. 10 January 2003. http://www.kspg-ag.de/index.php?fid=206&qid=&qpage=0&lang=3. Retrieved 13 January 2010. 
Advertisement