Numerical simulation of effects of reactor dimensions on isothermal CVI process of C/SiC composites
Numerical simulation of effects of reactor dimensions on isothermal CVI process of C/SiC composites
复制标题
反应器尺寸对C/SiC复合材料等温CVI过程影响的数值模拟
DOI：
10.1016/j.commatsci.2008.05.009
复制
发表时间：
2008-12
影响因子：
3.3
通讯作者：
潘伟
中科院分区：
文献类型：
--
作者：
潘伟
采用二维轴对称数学模型，考虑了动量、能量和质量的输运现象，并结合浸渗引起的预制体结构变化，模拟了反应器尺寸对C/SiC复合材料等温CVI过程的影响。研究了反应器入口尺寸和反应器直径对C/SiC复合材料的浓度分布和随时间的致密化行为的影响。反应器入口尺寸对C/SiC复合材料的ICVI过程影响不大。计算结果表明，在任意浸渗时间内，预制体中MTS的平均摩尔浓度和整体密度均随反应器直径的增大先增大后减小，而MTS的摩尔浓度梯度随反应器直径的增大而逐渐减小。对于所取的预成型件，优选的反应器直径暗示为90 mm。对C/SiC复合材料ICVI过程致密化行为的计算结果表明，反应器直径对致密化规律和密度绝对值的影响不明显。
A two-dimensional axisymmetrical mathematical model taking into account the transport phenomena of momentum, energy and mass in conjunction with the infiltration induced changes of the preform structure were implemented to simulate the effects of the reactor dimension on the isothermal CVI process of C/SiC composites. The effects of the reactor inlet dimension and the reactor diameter on the concentration distribution and the time-dependent densification behaviors of C/SiC composites were studied. The reactor inlet dimension was found to impose trivial effects on the ICVI process of C/SiC composites. Calculation results show that the mean MTS molarity in preform and the global density increase firstly and then decrease with the elevating reactor diameter at any given infiltration time though the MTS molarity gradients drops gradually with the elevating reactor diameter. The preferable reactor diameter is implied to be 90mm for the preform taken. Calculation results of the densification behavior of C/SiC composites during the ICVI process imply that the reactor diameter does not evidently influence both the rules of densification and the absolute values of the density.
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影响因子：
--
作者：
E. Fitzer;R. Gadow
通讯作者：
E. Fitzer;R. Gadow
影响因子：
6.3
作者：
N. Reuge;G. Vignoles
通讯作者：
N. Reuge;G. Vignoles
DOI：
10.1088/0965-0393/14/6/001
发表时间：
2006-09
影响因子：
1.8
作者：
Xi Wei;Lai-fei Cheng;Litong Zhang;Yongdong Xu
通讯作者：
Xi Wei;Lai-fei Cheng;Litong Zhang;Yongdong Xu
影响因子：
3.3
作者：
Xi Wei;Lai-fei Cheng;Litong Zhang;Yongdong Xu;Qingfeng Zeng
通讯作者：
Xi Wei;Lai-fei Cheng;Litong Zhang;Yongdong Xu;Qingfeng Zeng
影响因子：
3.9
作者：
N. Tai;T. Chou
通讯作者：
N. Tai;T. Chou