Based on the model of pyrolytic carbon matrix texture formation and transformation in CVI for densification of carbon/carbon composites, a new model was constructed to describe the surface of pyrolytic carbon deposited in a honeycomb structure pores. This new model is related with structure characteristics of graphite microchip. The Monte Carlo method is applied to simulate the pyrocarbon deposition kinetics and to analyze the influence of surface area/volume (AS/VR) and gas pressure on the texture of pyrocarbon in the process of isothermal-isobaric chemical vapor infiltration (ICVI). According to the numerical simulation results, under certain conditions of pressure, various textured carbon were obtained by controlling AS/VR in CVI process. Between two critical values (1.45 mm-1 and 8.9 mm-1 near the inlet, 0.3 mm-1near the outlet) of AS/VR, the high-textured carbon can be obtained. Moreover, if AS/VR is certain value and pressure is less than 30 kPa, pyrolytic medium and high textured carbon texture can be obtained as a result of different pressure in CVI process. There is also a critical pressure value and the high-textured carbon can be obtained if the pressure is greater than the critical value.
|Number of pages||8|
|Journal||Wuji Cailiao Xuebao/Journal of Inorganic Materials|
|Publication status||Published - Dec 1 2016|
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Inorganic Chemistry