Abstract
A vacuum suction casting process has been devised for manufacturing composites of aluminium reinforced with chemical vapour deposition (CVD) SiC filaments. Three types of CVD SiC filaments were tested in an aluminium alloy (Al−10% Si) matrix. The wettability and degradation of the filaments during the liquid infiltration and the mechanical properties of the composite rods were studied. Low infiltration temperatures were achieved as a consequence of good wettability under the specific conditions of the casting process. The uncoated SiC filament showed severe degradation after liquid infiltration, whereas the SCS filaments exhibited excellent protective response to molten aluminium. Composite rods consisting of 50 vol. % SCS-6 filament possessed tensile strengths as high as 1·6–1·7 GPa.
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