Abstract
A novel kind of carbon foam reinforced carbon–carbon composite with high density and mechanical properties was produced by densifying carbon foam preforms enhanced by chopped carbon fibers. The mechanical properties and densification efficiency of this composite could be improved by adding of fibers. The highest density of this composite could reach 1.5 g/cm 3. The compressive strength increased by 38.9%, 66.7% and 29.4% when the additive amount of chopped fibers was 1%, 3% and 5% (wt.%) respectively. SEM observation showed that when the additive amount of fibers reached 5%, micro-cracks appeared in carbon foam preforms and resulted in the decrease in compressive strength of composite no. 4.
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