RESEARCH ON THE RELATIONSHIP MODEL BETWEEN THE POROSITY OF C/C PREFORM AND PERFORMANCE OF C/SIC COMPOSITES FABRICATED BY GASEOUS SILICON INFILTRATION

Abstract

Abstract: A model used to in search of the relationship between the porosity of C/C preforms and the constitute of C/SiC composites was established and validated,where the C/SiC composites was fabricated by the gaseous silicon infiltration process with the C/C preforms possessed different porosities. The results showed that the value derived from the experiment in accord with predicted ones mostly. With the increase of porosity of C/C perform,the density of C/SiC composites also increased at first and then decreased after a critical value,so are the mechanical properties and phase content which derived from XRD analysis. The main reason for the deviation between the model and experiment is the un-totally reaction of pyrolysis carbon.

Key words: C/C, C/SiC, porosity, model, gaseous silicon infiltration

CLC Number:

TB332

LIU Wei, LIU Rong-jun, CAO Ying-bin, YANG Hui-yong. RESEARCH ON THE RELATIONSHIP MODEL BETWEEN THE POROSITY OF C/C PREFORM AND PERFORMANCE OF C/SIC COMPOSITES FABRICATED BY GASEOUS SILICON INFILTRATION[J]. COMPOSITES SCIENCE AND ENGINEERING, 2013, 0(2): 52-56.

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