Accession Number : AD0770474

Title :   Development of Carbon-Aluminum Composite Materials.

Descriptive Note : Final rept. 30 Jun 72-31 Aug 73,

Corporate Author : GENERAL ELECTRIC CO PHILADELPHIA PA RE-ENTRY AND ENVIRONMENTAL SYSTEMS DIV

Personal Author(s) : Gebhardt,Joseph J.

Report Date : SEP 1973

Pagination or Media Count : 111

Abstract : Exploratory development of a practical, continuous process with early scale-up potential for producing aluminum- or aluminum alloy-infiltrated tows of commercial graphite fiber was approached by application of selected coatings to the fiber surfaces through various chemical vapor deposition processes. Coating systems which were studied included (a) boron, (b) a boron-carbon (borocarbon) mixture, (c) silicon and (d) nitrided boron. Consecutive coatings of boron plus CVD aluminum were also investigated. The ability of coated fibers to be incorporated into aluminum-base composites was evaluated by means of vacuum infiltration and continuous melt/draw methods. Supporting studies included investigation of the interaction between molten aluminum and aluminum-4043 with representative surface coatings. Low fiber volume fraction experimental composites (3-10 vol. %) were evaluated by tensile or flexure tests together with optical and scanning electron microscopy. (Modified author abstract)

Descriptors :   *Composite materials, Carbon fibers, Graphite, Aluminum, Aluminum alloys, Matrix materials, Metals, Nonmetals, Vapor deposition, Chemicals, Boron, Silicon coatings, Coatings

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE