Accession Number : ADD012916

Title :   Process for Producing Graphite Fiber/Aluminum-Magnesium Matrix Composites.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Divecha,Amarnath P ; Karmarkar,Subhash D ; Foltz,John V

Report Date : 25 Mar 1986

Pagination or Media Count : 5

Abstract : The present invention relates generally to, an improved composite material comprised of a graphite fiber/aluminum matrix composite. The graphite fiber/aluminum matrix composites of this invention have been found to have marketly improved properties when coated with magnesium (Mg) vapor. The patent discloses a method of treating a commercially available ion plated graphite/aluminum composited with suitable hydroscopic liquid selected from the group consisting of methylene chloride, toluene, xylene and where such liquid treatment results in capillary action in the graphite fibers and subsequently heat treating the graphite/aluminum composite in a hot processing step where magnesium powder is sublime at a temperature in the range of 350-450 C. and where such sublime magnesium vapor uniformly coats graphite and aluminum in the composite material so as to obtain a graphite aluminum composite coated with magnesium.

Descriptors :   *PATENTS, *METAL MATRIX COMPOSITES, *CARBON FIBERS, *MAGNESIUM, *ALUMINUM, *METAL COATINGS, WHISKER COMPOSITES, POWDER METALS, FIBER REINFORCED COMPOSITES, FABRICATION, VAPOR DEPOSITION, STRENGTH WEIGHT RATIO, MECHANICAL PROPERTIES, METAL VAPORS, CAPILLARITY, CHLORIDES, COMPOSITE MATERIALS, GRAPHITE, GRAPHITED MATERIALS, HIGH TEMPERATURE, IONS, LIQUIDS, METHYLENES, PLATING, PROCESSING, TOLUENES, VAPORS, XYLENES

Subject Categories : Laminates and Composite Materials
      Coatings, Colorants and Finishes

Distribution Statement : APPROVED FOR PUBLIC RELEASE