C/C-Cu 复合材料的弯曲性能

以碳纤维针刺毡为整体骨架,采用CVI工艺制备出不同密度的C/C复合材料,然后用挤压铸造成型方法制备了C/C-Cu复合材料。并对不同组分的C/C-Cu以及C/C复合材料的弯曲性能进行了研究,结果表明:密度为4.59 g/cm3的C/C-Cu复合材料的xy向弯曲强度高于密度为1.85 g/cm3的C/C复合材料,并且具有一定的塑性,铜基体发挥了增韧增强的作用;密度为2.04 g/cm3的C/C-Cu复合材料的xy向弯曲强度低于密度为1.85 g/cm3的C/C复合材料,且没有塑性出现,铜基体分散未发挥增强作用。

Flexural Properties of C/C-Cu Composites

By taking needled-carbon fiber felts as framework,C/C composites with different density were fabricated by chemical vapor infiltration method (CVI),and then C/C-Cu composites were made by squeeze casting technique. Flexural properties of C/C-Cu and C/C containing different components content were tested and investigated.The experimental results indicate that flexural strength of C/ C-Cu composites with the density of 4. 59 g/ cm3 is higher than that of C/ C composites with the density of 1. 85 g/ cm3 in xydirection. Those C/ C-Cu composites in which copper matrix plays a role of toughening and strengthening have certain plasticity;flexural strength of C/ C-Cu composites with the density of 2. 04 g/ cm3 is lower than that of C/ C composites with the density of 1. 85 g/ cm3 in xy-direction.Those C/C-Cu composites with dispersive copper matrix have no plasticity.