Chemical vapor infiltration(CVI)is an essential process to manufacture the Continuous Fiber Reinforced Ceramic Matrix Composites.In order to optimize the manufacturing process,a systemic and in-depth study on simulating the flow field of CVI reactor is very important.The flow fields of CVI reactors were simulated by finite element method(FEM)based ANSYS-FLOTRAN of commercial software.For the simple shape component,the flow field is influenced evidently by the lay-mode and arrays of components.The boundary conditions of components are more uniformity and symmetry by parallel arrays of components than that of cross arrays,so the circumfluence in the CVI reactor was decreased.The velocity and pressure difference of the mixed gas were increased with the increase and uniformity of components in parallel arrays.It is key to improve the chemical vapor infiltration quality that reducing the free-space in the CVI reactor.Under the principle of reducing free spacing in CVI reactor,the flow field could be improved by the guide plates in CVI reactor with complex non-conventional shape components,and the circumfluence could be avoided around the components,so the flow fields were optimized.
Key words
chemical vapor infil /
flow field /
FEM simulation /
optimization design
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References
EVANS A G.Perspective on the development of high toughness ceramics[J].J Am Ceram Soc,1990,73(2):187-206.
NASLAIN R.Processing of ceramic matrix composites[J].Key Eng Mater,1998,164-165:3-8.
徐永东,成来飞,张立同,等.连续纤维增韧碳化硅陶瓷基复合材料研究[J].硅酸盐学报,2002,30(2):184-188.
肖鹏,徐永东,黄伯云.CVI法快速制备C/SiC复合材料[J].硅酸盐学报,2002,30(2):240-243.
STINTON D P,CAPUTO A J.Synthesis of fiber-reinforced SiC composites by chemical vapor infiltration[J].Am Ceram Soc Bull,1986,65(2):347-350.
CAPUTO A J,LACKEY W J.Fabrication of fiber reinforced ceramic composites by chemical vapor infiltration[J].Ceram Eng Sci Proc,1985,5(7-8):654-667.
XU Yong-dong,ZHANG Li-tong.Three dimensional C/SiC composites prepared by chemical vapor infiltration[J].J Am Ceram Soc,1997,80(7):1897-1900.
XU Yong-dong,ZHANG Li-tong,CHENG Lai-fei,et al.Microstructure and mechanical properties of three dimensional carbon/silicon carbide composites fabricated by chemical vapor infiltration[J].Carbon,1998,36(7-8):1051-1056.
肖鹏,徐永东,张立同,等.CVI反应器气体流动可视化法烟系统[J].航空材料学报,2000,20(2):46-48.
姜开宇,李贺军,候向辉,等.轴对称C/C复合材料件等温CVI过程的数值模拟研究[J].西北工业大学学报,2000,18(4):665-668.
MCALLISTER P,WOLF E E.Simulation of a multiple substrate reactor for chemincal vapor infiltration of pyrolytic carbon with carbon-carbon composites[J].AICHE Journal,1993,39(7):1196-1209.
TAI N H,CHOU T W.Analytical modeling of chemical vapor infiltration in fabrication of ceramic composites[J].J Am Ceram Soc,1989,72(3):414-420.
STARR T L.Gas Transport Model for Chemical Vapor Infiltration[J].J Mater Res,1995,10(9):2360-2366.
LI Ke-zhi,LI He-jun,JIANG Kai-yu,HOU Xiang-hui.Numerical simulation of isothermal chemical vapor infiltration process in fabrication of carbon-carbon composites by finite element method[J].Science in China(Series E),2000,43(1):77-85.
吴望一.流体力学[M].北京:北京大学出版社,1998:91.
鲁德洋.冶金传输基础[M].西安:西北工业大学出版社,1991.
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