Numerical simulation of the thermal-gradient chemical vapor infiltration process for production of fiber-reinforced ceramic composite
Numerical simulation of the thermal-gradient chemical vapor infiltration process for production of fiber-reinforced ceramic composite
复制标题
纤维增强陶瓷复合材料热梯度化学气相渗透生产过程的数值模拟
DOI：
10.1016/s0009-2509(00)00492-9
复制
发表时间：
2001
影响因子：
4.7
通讯作者：
K. Hashimoto
中科院分区：
文献类型：
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作者：
T. Tago;M. Kawase;Y. Ikuta;K. Hashimoto
为了描述SiCW/ al2o3复合材料生产过程中的热梯度化学蒸汽渗透（CVI），建立了一个数值模型。所提出的模型考虑了氧化铝在多孔预制体中的反应、扩散和沉积。为了描述预制体和复合材料的多孔结构，提出了非连通柱面立方阵列模型。CVI的实验结果与计算结果吻合较好。研究了总压、加热温度和初始表面温度对最终残余孔隙率和渗透时间的影响。加热温度和初始表面温度对孔隙率和入渗时间的影响大于总压力。为了得到致密的复合材料，初始表面温度必须随着加热温度的升高而降低。
A numerical model was developed in order to describe the thermal-gradient chemical vapor infiltration (CVI) for the production of SiCW/Al2O3composite. The proposed model considered reaction, diffusion and deposition of alumina within the porous preform. The cubic array of disconnected cylinders model was proposed in order to represent the porous structure of the preform and the composite. The experimental results of CVI were in good agreement with the calculated results. The effects of total pressure, heating temperature and initial surface temperature on the final residual porosity and the infiltration time were investigated. The heating temperature and the initial surface temperature had a larger effect on the porosity and the infiltration time than did the total pressure. In order to produce a dense composite, the initial surface temperature must decrease with increasing heating temperature.
DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
A.I.Volokitin;B.N.J.Perssion;H.Ueba;H. Ueba;H. Ueba;H. Ueba
通讯作者：
H. Ueba