1988 Volume 74 Issue 3 Pages 497-504
Carbon fiber-carbon matrix (C/C) composites were fabricated using a simple hot process. The reinforcements were carbon cloth prepreg sheets impregnated with three kinds of resin, that is, coal tar pitch, epoxy and phenol. The matrix was a fine pulverized coke mixed with a carbonaceous bulk mesophase (BM) for a binder. The maximum temperature and pressure during the hot-press were 600°C and 49 MPa, respectively.
The results were as follows:
(1) The strengths of the composites were significantly affected by three factors: the kinds of impregnated resin, the fiber volume fraction (Vf), and the BM content in the matrix. The maximum strength of 83 MPa was attained in the composite reinforced with the coal tar pitch prepreg sheets at a BM content of 50% and a Vf=40%. With the other types of prepreg sheets, the maximum strengths were much less than 83 MPa regardless of Vf.
(2) The maximum strengths of the composites reinforced with the coal tar pitch and epoxy resin prepreg sheets were decreased by a secondary heat treatment at 800°C to 1 500°C.
