Journal of Shanghai University(Natural Science Edition) ›› 2014, Vol. 20 ›› Issue (1): 15-32.doi: 10.3969/j.issn.1007-2861.2013.07.049

• Composite Materials • Previous Articles     Next Articles

Manufacturing of CMCs by Chemical Vapor Infiltration Process

CHENG Lai-fei, ZHANG Li-tong, MEI Hui, LIU Yong-sheng, ZENG Qing-feng   

  1. Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University, Xi’an 710072, China
  • Received:2013-12-20 Online:2014-02-28 Published:2014-02-28

Abstract: This paper reviews the development trends, and flexible, robust and toughness control and design in the simulation and visualization of ceramic matrix composites (CMCs) manufacturing by chemical vapor infiltration (CVI) process. The gaseous route involves gas transfer, reaction thermodynamics and kinetics, and pore structure modeling, which is a typical multi-scale and multi-physics problem. Quantum chemistry, chemical thermodynamics, microscopic kinetics, finite element, the level-set and artificial intelligence methods are applied to achieve densification process simulation and composition analysis of composite materials, accurately reflect anisotropy of gas transfer in the porous preform and the deposition process, and provide more accurate control parameters for process optimization. CVI is a flexible and robust process for manufacturing CMCs. It has extensive applications and abilities in process control, adjustment, design, assemble, error-correction andcompatibility. It is suitable for microstructure control of CMCs, and is the most advanced
fundamental method for manufacturing CMCs. Strength and toughness are the core issues for CMCs, including coordination of the moduli among reinforcement fibers, matrix and inter-phases, residual thermal stresses control, and the volume fraction design for both the matrix and the fibers. Tough CMCs can be manufactured with reasonable control and design of these parameters so as to meet the requirements under different environmental
conditions.

Key words: ceramic matrix composites, chemical vapor infiltration (CVI), control and design, flexibility and robustness, simulation and visualization

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