Carbon carbon composite material is carbon fiber reinforced carbon matrix composite material,and it has a series of good properties,such as light weight,high specific strength,high specific modulus,high thermal resistance,low coefficient of thermal expansion,excellent friction property,and designable,the material now is already widely used for the nose cone and wing leading edge of space shuttle,nozzle throat and exit cone of SRM, nose-tip of missile,aircraft brake disc and high thermal mould etc.
Punctured structure carbon carbon composite material is one of the composite materials of C/C composite,the good properties includes:good isotropy property,strength property. And the strength property is mainly decided from the structure of carbon fiber perform. The X-Y direction of the punctured structure perform includes carbon fiber cloth and the carbon fiber net,make them composite laminate,and there are some punctured fasciculus along the Z direction.
Use the different gap,different quantity carbon fiber to make the carbon fiber perform,then CVI,pitch-impregnated and high pressure carbonization to densify,the tensile property testing result show that the different gap between puncture,different number of carbon fiber has an influence to the tensile strength,with the distance of the puncture reduce,the number of carbon fiber increase,the carbon fiber content along Z axis increase and all these influence can lead to the different tensile strength along the Z axis.
The tensile strength of the carbon carbon composite material is mainly decided from the carbon fiber,the densifying is the processing that carbon matrix filling the carbon perform,the porosity is because of the densifying processing,and this defect will lead to the destruction when there is a load on the products,the porosity will reduce the loaded area,and has an influence to the material.
