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BIAN Guojun, QI Lehua, SONG Yongshan, et al. Densification process for thermal gradient CVI fabricating C / C composites based on numerical simulation[J]. Acta Materiae Compositae Sinica, 2011, 28(4): 29-33.
Citation: BIAN Guojun, QI Lehua, SONG Yongshan, et al. Densification process for thermal gradient CVI fabricating C / C composites based on numerical simulation[J]. Acta Materiae Compositae Sinica, 2011, 28(4): 29-33.
shu

Densification process for thermal gradient CVI fabricating C / C composites based on numerical simulation

  • 1.

    School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, China;

  • 2.

    School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China

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  • Received Date: July 30, 2010
  • Revised Date: November 15, 2010
    Abstract
  • A homogeneous and heterogeneous reaction mathematical model of multi-field coupling was developed according to the characteristics of thermal gradient chemical vapor infiltration (CVI) fabricating C/C composites, using 2D carbon felt as the preform, natural gas as the carbon source gas, the furnace pressure of 100 kPa. The time evolution of the preform density was obtained by calculation, the effects of deposition temperatures and gas flow rates on the densification process were analyzed, and the reasonable range of deposition temperature and gas flow rate were obtained. After the preform being infiltrated for 100 h, the overall and radial-direction densities of the preform from simulation agree well with those from experiment. The model is validated to reliable and the simulation has capability of forecasting the process.
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