Effect of the average particle size of granular pitch coke on properties of pitch-based granular coke reinforced carbon composites

Granular coke reinforced pitch-based carbon composites (CRPCC) with high density and low cost were fabricated by a mould pressing and semi-carbonization technology. The effect of the average particle size of the granular pitch coke on the density and compressive strength of CRPCC materials was studied. The rules about the effect of the density on the compressive strength of CRPCC materials were mathematically analyzed. Results show that the density and the compressive strength increase with an increase of the average particle size of granular pitch coke. In the experiment, the density and compressive strength increase from 1.28 g/cm³ to 1.77 g/cm³ and from 10.1 MPa to 55.0 MPa respectively when the average particle size of the granular pitch coke as reinforcement rises from 44.2 to 206.3 mesh.