1988 Volume 74 Issue 3 Pages 489-496
Carbon fiber-carbon matrix (C/C) composites were fabricated using a simple hot press process. The matrix was prepared from a fine pulverized coke mixed with a carbonaceous bulk mesophase (BM). The fibers were epoxy-resin-impregnated unidirectional long carbon fibers (UD fibers). The maximum temperature and pressure in the hot press process were 600°C and 49MPa, respectively.
The resalts were as follows :
(1) When one type of fiber (UD-1) was used, the maximum strength was 119 MPa at a BM content of 70% in the matrix and the volume fraction of the fiber, Vf=30%. When reinforced by another type of fiber (UD-2), the maximum strength reached 130 MPa at a BM content of 80% and a Vf=46.4%. Both the strengths exceeded that of a commercial C/C composite.
(2) The composites reinforced by UD-2 showed a maximum strength which decreased to 80 MPa after a secondary heat treatment at 700°C to 1 500°C.
