Abstract：Using non-woven fabric/fibre web/copper mesh (A-type) and fibre web/copper mesh (B-type) as reinforcements, three kinds of Cf/Cu/C composites were prepared by chemical vapor infiltration and impregnation- carbonization with resin carbon method. The percentage of pyrolytic carbon were 38% (M1), 29% (M2), 19% (M3) in the matrix. Respectively the flexural property of the composite was measured on Instron- 3369 mechanical testing machine. The effects of type of preform and pyrolytic carbon content on mechanical property were investigated. The results show that with the decrease of pyrolytic carbon content, the flexural strength of A-type and B-type composites decreases gradually in vertical and parallel direction. For the same specimen, the flexural strength of Cf/Cu/C composites in the vertical direction is better than that of parallel direction, but the difference is small. Compared with B-type Cf/Cu/C composites, A-type Cf/Cu/C composites have better mechanical property. When the bending is carried out, carbon fibers from pyrolytic carbon and resin carbon layers are pulled out, and fracture morphology is step-like.
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2019, Vol. 24 
