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One of the best-known applications for pressurised Wills Rings, or Cooper Rings as they were originally known, is for sealing the combustion chamber of piston engines. [5] These are not widely used, owing to their high cost and the good performance of other modern gaskets, but they have a place for high-performance engines.
Abradable Powder Coatings (APC's) on piston skirts and lands are advancing performance and life of cylinder kits in three principal ways: APC coatings lap in to permanently improve piston-to-bore fit, reducing unwanted motion and creating a thin, resilient oil film for lower friction with less wear.
The aluminum cylinders also gave a much better heat conductivity and lower friction than cast iron liners, an important attribute for a high-output engine. The coating was further developed as a replacement for hard-chrome plated cylinder bores for Mercury Marine Racing, and Kohler Engines, and as a repair replacement for factory-chromed ...
An abradable coating is a coating made of an abradable material – meaning if it rubs against a more abrasive material in motion, the former will be worn whereas the latter will face no wear. Abradable coatings provide a .1 to .2% performance improvement compared to those without coating.
Ceramics' high resistance to heat helped pave the way towards the first commercial use of gas turbine engines, the successes of which led to the idea of an all-ceramic engine. [ 1 ] [ 3 ] Between 1985 and 1989, Nissan , in collaboration with NGK , produced the world's first ceramic turbocharger , later debuting this on the 1985 Fairlady Z 200ZR .
The pistons used in an Alusil engine block typically have an iron-clad plating or similar coating on the piston skirts to prevent galling of the aluminum pistons when run against the uncoated aluminum cylinder bore. Examples of this coating include Mahle Ferrostan (I & II), FerroTec, or Ferroprint. [9]
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