采用有限差分模型对单向碳/碳复合材料的化学气相渗透(CVI)过程进行模拟,并设计了对照实验对模型进行了验证.模型所预测的预制体密度随渗透时间变化关系曲线与对照实验结果较为吻合,反映了模型的准确性和实用性.此外通过模型还可得到致密化过程中气体在预制体内的分布情况,对复合材料致密化均匀性进行表征,并可获得材料孔隙率变化特点等一系列重要信息,为CVI机理的深入研究打下了良好的基础,对CVI工艺的改进和优化有较强的指导意义.
参考文献
| [1] | Buckley J D, Edie D D. Carbon-Carbon Materials and Composites. New Jersey: Noyes Publication, 1993. 1～17 |
| [2] | Lackey W J, Starr T L. Fiber Reinforced Ceramic Composites. New Jersey: Noyes Publication, 1991. 397～450 |
| [3] | Starr T L, Vinyard G F. Modeling of chemical vapor infiltration for ceramic composite fabrication. In: Proceedings of the American Society for Composites-Fifth Technical Conference. Pennsylvania: Technomic Publishing Company, 1990. 789～796 |
| [4] | Gupte S M, Tsamopoulos J A. An effective medium approach for modeling chemical vapor infiltration of porous ceramic materials. J Electrochem Soc, 1990, 137(5):1626～1638 |
| [5] | Sheldon B W, Besmann T M. Reaction and diffusion kinetics during the initial stages of isothermal chemical vapor infiltration. J Am Ceram Soc, 1991, 74(12):3046～3053 |
| [6] | Vaidyaraman S, Lackey W J, Agrawal P K, et al. 1-D model for forced flow-thermal gradient chemical vapor infiltration process for carbon/carbon composites. Carbon, 1996, 34(9):1123～1133 |
| [7] | Nyan-Hwa Tai, Tsu-Wei Chou. Analytical modeling of chemical vapor infiltration in fabrication of ceramic composites. Journal of the American Ceramic Society, 1989, 72(3):414～420 |
| [8] | Vaidyarman S, Lackey W J, Agrawal P K,et al. Carbon/carbon processing by forced flow-thermal gradient chemical vapor infiltration using propylene.Carbon, 1996, 34(9):347～362 |
| [9] | 陈轶希,李贺军,侯向辉,等. 单向碳/碳复合材料化学气相渗透特征. 机械科学与技术,1998,17(5):823～825 |
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