Accession Number : ADD013604

Title :   Metal Matrix Composite Piston Head and Method of Fabrication.

Descriptive Note : Patent, Filed 9 Jan 86, patented 17 Nov 87,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Bullat, David M

Report Date : 17 Nov 1987

Pagination or Media Count : 8

Abstract : The present invention is directed to providing an improvement for an internal combustion engine having hot working gases displacing at least one reciprocating aluminum piston. A metal matrix composite piston head is inertially welded onto the piston. The piston is fabricated from aluminium and the metal matrix composite piston head has an aluminum and the metal matrix composite piston head has an aluminum-silicon carbide composition in which there is a 23% weight silicon carbide fiber composition. The method embraces the mixing of a metal matrix composite having a composition of 23% weight of silicon carbide fibers with powdered aluminum, pressing the mixed metal matrix composite to a billet form having nearly the same diameter as the aluminum piston and impact welding the billet to form a metal matrix composite head on the aluminum piston.

Descriptors :   *INTERNAL COMBUSTION ENGINES, *METAL MATRIX COMPOSITES, *PISTONS, *TORPEDO MOTORS, *PATENTS, ALUMINUM, FIBERS, HOT GASES, HOT WORKING, IMPACT, MIXING, POWDER METALS, SILICON CARBIDES, WELDING, BILLETS(MATERIALS), HEAT RESISTANT MATERIALS, RECIPROCATING ENGINES

Subject Categories : Reciprocating and Rotating Engines
      Laminates and Composite Materials
      Torpedoes

Distribution Statement : APPROVED FOR PUBLIC RELEASE