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This paper deals with carbon/carbon composites modified with a ceramic component designed for bone tissue repairing. The composites were manufactured from pitch precursors modified with a hydroxyapatite (HAp) nanopowder. Carbon fibers were used as a reinforcement. The flexural strength and modulus of the composites before and after modification with HAp were examined. Biological properties of the composites were examined in in vitro tests. Apatite formation on ceramic nanoparticle‐modified carbon composite surface was observed. Mechanical tests showed that nanohydroxyapatite‐modified composite samples have good mechanical properties and perform an improved bioactivity in simulated body fluid in comparison with the pure carbon samples.

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Wet impregnation with phenolic resin and P-CVI methods were used to manufacture C/C composites. The influence of impregnation process of porous 2D carbon fibre substrate with resin and pyrocarbon deposited by CVD technique on mechanical properties of formed composites was studied. The results indicate that using P-CVI method large pores remain in the matrix resulting in lower mechanical strength. This fraction does not undergo any changes during thermal treatment. The flexural modulus of C/C composites depends mainly on the type of reinforcing fibres. The values of moduli measured in composites obtained by both methods do not differ significantly.Comparison of two methods of fabrication of C/C composite show that much better strengths can be achieved by forming the carbon matrix in solid state.