FABRICATION OF UNIDIRECTIONAL SHORT FIBERREINFORCED LAS COMPOSITES BY DOCTORBLADE CASTING

The fabrication processing of unidirectional short carbon and Nicalon fiberreinforced LAS composites was investigated. The parameters influencing dispersion and orientation of short fiber were discussed. It is shown that homogeneity of dispersion of short fibers was much better by stirring in mixing solution of ethylene glycol and aqueous polyvinyl alcohol solution than by other methods. Unidirectional alignment of short fibers in prepreg could be obtained by doctorblade casting. The samples fabricated in the study have excellent strength and toughness.