THIN FILM STRUCTURAL REINFORCEMENTS FOR HIGH PERFORMANCE COMPOSITES.
Final summary rept. 1 Feb-27 Nov 67,
NATIONAL RESEARCH CORP CAMBRIDGE MASS NORTON EXPLORATORY RESEARCH DIV
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The work is a continuation of the development of high modulus, high strength, low density composites, which have mechanical properties which are isotropic in the plane of the composite. Composites were made of multiple sheets of vacuum deposited boron or boron carbide applied to substrates such as aluminum foil or 0.5 mil polyimide Kapton. Methods for increasing the degree of adhesion of boron and boron carbide to the substrate materials were developed. Experimental work indicates that the evaporation and deposition of boron and boron carbide was considerably less difficult than the evaporation and deposition of silicon carbide. Increased volume fractions of reinforcement in composites were obtained by use of temporary substrates. Samples of boron carbide, boron and silicon carbide on polyimide and boron carbide and boron on aluminum were supplied to AFML. Author
- Laminates and Composite Materials