Effect of porous C/C substrate density on compressive property of C/C-Cu composites

Carbon fiber reinforced carbon and copper (C/C-Cu) composites were prepared by a combination of chemical vapor infiltration (CVI) and melt copper impregnation by pressure. 3 kinds of C/C-Cu composites with different densities of porous carbon/carbon composites (C/C substrates) were prepared and their compressive properties were tested on CSS-44100 electronic tensile testing machine. The effect of C/C substrate density on compressive property of C/C-Cu composites was studied. The results show that C/C-Cu composites have high compressive strengths, which have small differences between parallel and vertical direction. With the increase of the C/C substrate density, the compressive strength of C/C-Cu composites increases and the anisotropy improves. The one with highest density has the highest compressive strength of 323.8 and 326.6 MPa. The composites are shearing along with 45° diagonal line in vertical direction, while destroyed by delaminating split in parallel direction.