Use of submicron diameter carbon filaments for reinforcement between continuous carbon fiber layers in a polymer-matrix composite Original Research Article

The incorporation of 0.1–0.2 μm diameter carbon filaments (0.6 vol.%) between continuous carbon fiber (7 μm diameter, 56.5 vol.%) layers in an epoxy-matrix composite during composite fabrication was found under flexure to greatly increase transverse and longitudinal tan δ values, increase the storage modulus in the transverse direction, slightly decrease the storage modulus in the longitudinal direction, and increase both longitudinal and transverse loss moduli to values as high as 2 GPa.