Welcome to Visit BULLETIN OF THE CHINESE CERAMIC SOCIETY! Today is

BULLETIN OF THE CHINESE CERAMIC SOCIETY ›› 2024, Vol. 43 ›› Issue (9): 3424-3437.

• Ceramics • Previous Articles     Next Articles

Simulation Studies on Silicon Infiltration Process in Porous Silicon Carbide Media

ZHANG Xuxi1,2,3, ZHANG Ge1,2,3, BAO Jianxun1,2,3, CUI Congcong1,2,3, GUO Conghui1,3, LI Wei1,3, ZHANG Wei1,3, ZHU Wanli1,3, XU Chuanxiang1,3, CAO Qi1,3, DONG Binchao1,3, ZHOU Lixun1,3, LI Yilin4   

  1. 1. State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China;
    2. University of Chinese Academic of Sciences, Beijing 100049, China;
    3. Key Laboratory of Optical System Advanced Manufacturing Technology, Chinese Academy of Sciences, Changchun 130033, China;
    4. School of Earth Sciences, Northeast Petroleum University, Daqing 163318, China
  • Received:2024-02-20 Revised:2024-04-03 Online:2024-09-15 Published:2024-09-19

Abstract: The in-depth study of infiltration process of simulated molten silicon in the porous preform of silicon carbide not only helps to understand the causes of defects in the reaction infiltration process, but also is of great significance to reveal the causes of special infiltration phenomena. In this paper, based on level set method, N-S equation and Young’s equation, the simulation of capillary infiltration process of molten silicon was carried out in the two-dimensional channel extracted and reconstructed by optical microscope image. The infiltration process of preform composed of 40 μm particles by molding and the preform based on particle gradation process was simulated. The results show that the larger inlet in infiltration process is conducive to rapid infiltration. The infiltration process gradually evolves from unsaturated infiltration to saturated infiltration in the same area. The pore structure of large cavity, sharp corner area and blind hole in preform will have a greater probability to evolve pore type defects. The boundary conditions of exhaust outlet of preform has a strong correlation with skin-forming phenomenon of infiltration.

Key words: silicon carbide, infiltration simulation, microscopic channel, level set method, wetting, N-S equation

CLC Number: