Accession Number : ADA131257

Title :   Methods of Improving the Matrix Dominated Performance of Composite Structures: A Technical Review.

Descriptive Note : Final rept.,

Corporate Author : NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA AIRCRAFT AND CREW SYSTEMS TECHNOLOGY DIRECTORATE

Personal Author(s) : Garcia,Ramon

PDF Url : ADA131257

Report Date : Jul 1983

Pagination or Media Count : 70

Abstract : Contained herein is a discussion of methods of increasing the matrix dominated properties of two-phase, continuous fiber/polymer composite materials by the addition of a third phase. For example, a resultant composite exhibiting improved matrix dominated properties may consist of an epoxy matrix binding together both silicon carbide whiskers and continuous graphite fibers. The potential exists to hold the fiber volume content at a level of approximately 50 to 60 percent while displacing 5 to 15 percent of the epoxy with whiskers. The resultant fiber/whisker/epoxy composite has the potential to exhibit superior strength and stiffness to weight properties as compared to a fiber/epoxy composite. The distinct approaches are examined. The first appraoch utilizes the fibers as a carrier for the whiskers, or third phase. It is proposed that silicon carbide whiskers be grown directly on the surface of graphite fibers. These fibers can then be impregnated with the epoxy matrix. The second approach is to utilize the epoxy matrix as a carrier for the whiskers. Silicon carbide whiskers can be added to the epoxy prior to impregnation of the graphite fibers.

Descriptors :   *Fiber reinforced composites, *Epoxy composites, *Whisker composites, Silicon carbides, Graphite, Synthetic fibers, Crystal growth, Weight, Strength(Mechanics), Surfaces

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE