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Journal of Shanghai University >

2016 , Vol. 22 >Issue 6: 691 - 700

DOI: https://doi.org/10.3969/j.issn.1007-2861.2015.04.005

Monte Carlo simulation of pyrocarbon deposition process based on graphite crystallite surface model

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  • 1. Research Center for Composite Materials, Shanghai University, Shanghai 200072, China;
    2. National Key Laboratory of Advanced Functional Composite Materials, Aerospace Research Institute of Materials and Processing Technology, Beijing 100076, China

Received date: 2015-03-18

  Online published: 2016-12-30

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Abstract

The base plane of graphite crystallite was proposed as the surface model of pyrocarbon prepared in chemical vapor infil-tration (CVI) processes. The Particle-Filler(P-F) model and Langmuir-Hinshelwood (L-H) mechanism of CVI processes were applied to simulate the texture formation in the process of pyrocarbon growth using the Monte Carlo (MC) method, and the process of textural interface formation was studied. The results showed that the texture formation mechanism of pyrocarbon deposition presented an S-shape curve with bi-stability transition by variation of the ration of C6 species to C2 species in the gas phase. Moreover, there was a hysteresis in the bi-stability transition of pyrocarbon textures, and the hysteresis was clearly influenced by the composition of the gas-phase species.

Key words：  graphite crystallite surface model;  hysteresis;  Monte Carlo (MC) method;  texture transition; pyrocarbon

Cite this article

LIU Binglin1, MA Xiao1, FANG Jinming2, TANG Zhepeng1, LI Aijun1, SUN Jinliang1 . Monte Carlo simulation of pyrocarbon deposition process based on graphite crystallite surface model[J]. Journal of Shanghai University, 2016 , 22(6) : 691 -700 . DOI: 10.3969/j.issn.1007-2861.2015.04.005

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