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The main factors of the influence of the carbon carbon composite material include the type of carbon fiber, volume fraction and the type to reinforce,the type and structure of the matrix carbon,material density and the heating temperature(graphitization) etc.the mechanical property of the carbon carbon composite material will increase with the increasing of the density,but the heating will reduce the strength of the C/C composite material. As to the densification process of embryo body is different,so the mechanical property of carbon composite material is usually different,different scolars will get different results.In general, we think that CVI carbon and the carbon fiber can form a good combination,so the CVI can make the carbon carbon composite with a better mechanical property than the…
The physical properties of carbon/carbon composite material are mainly included:density, degree of graphitization,hardness, thermal conductivity, electric conductivity, specific heat, coefficient of thermal expansion etc.Among these properties,the density,thermal conductivity and the graphitization are very important to the carbon carbon composite material which is used for aviation brake. The density can be the direct response of the C/C material,and it’s the basis of other properties,and the density depends on the density of the carbon fiber and the matrix carbon and the porosity. The degree of the graphitization is another important parameter of the C/C composite material,it has a close contact with the strength and friction property.now,there is no uniform method to test the graphitization degree,the ways to test it are mainly included…
The technological properties of graphite are mainly determined by its crystalline form. Crystalline morphology of different graphite minerals, with different industrial value and purpose. Industry, according to different crystalline morphology, the natural graphite into three categories. 1.dense crystalline graphite Dense crystalline graphite is also called bulk graphite. Such graphite crystal clear crystal visible. Particle diameter greater than 0.1 mm. The crystal arrangement is disordered and the structure is compact and massive. This: the characteristics of graphite is high grade, general carbon content is 60 ~ 65%, sometimes up to 80 ~ 98%, but plasticity and smooth than that of flake graphite. 2.flake graphite Graphite crystals are in the form of a scale; this is made of high strength under high…
