沉积条件对大尺寸C/C复合材料沉积速率的影响

李昂; 王雅雷; 刘青霖; 张立强; 李海梅

doi:10.19976/j.cnki.43-1448/TF.2025066

粉末冶金材料科学与工程 >

2026 , Vol. 31 >Issue 1: 37 - 47

DOI: https://doi.org/10.19976/j.cnki.43-1448/TF.2025066

理论研究

沉积条件对大尺寸C/C复合材料沉积速率的影响

李昂 ,
王雅雷 ,
刘青霖 ,
张立强 ,
李海梅

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1.中南大学粉末冶金全国重点实验室,长沙 410083;
2.中南林业科技大学湖南省林业装备工程技术研究中心,长沙 410004

王雅雷,研究员,博士。电话：13007496215;E-mail: yaleipm@csu.edu.cn

收稿日期: 2025-08-14

修回日期: 2025-11-12

网络出版日期: 2026-03-10

基金资助

国家重点研发计划资助项目(2022YFB3706103); 湖南省自然科学基金区域联合基金资助项目(2024JJ7640)

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Effects of deposition conditions on the deposition rate of large-size C/C composites

LI Ang ,
WANG Yalei ,
Liu Qinglin ,
ZHANG Liqiang ,
LI Haimei

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1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
2. Engineering Research Center for Forestry Equipment of Hunan Province, Central South University of Forestry and Technology, Changsha 410004, China

Received date: 2025-08-14

Revised date: 2025-11-12

Online published: 2026-03-10

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摘要

C/C复合材料因其优异的耐高温性能被广泛应用于航空航天领域。本文针对其化学气相渗透(chemical vapor infiltration, CVI)制备过程中热解炭(pyrolytic carbon, PyC)沉积速率及均匀性受多参数影响的问题,通过建立双室反应器有限元模型,仿真分析反应器内气相组分浓度分布,研究工艺温度、进气流量及系统压力对大尺寸C/C复合材料PyC沉积反应动力学的影响规律,并结合实验对仿真结果进行验证。结果表明：仿真结果与实验结果具有相同的变化趋势,且平均沉积速率最大误差为9.65%,验证了有限元模型的可靠性。本文为CVI工艺参数优化及大尺寸C/C复合材料的高效制备提供了理论支撑。

关键词： 化学气相渗透; C/C复合材料; 沉积速率; 反应动力学模拟; 计算流体力学

本文引用格式

李昂 , 王雅雷 , 刘青霖 , 张立强 , 李海梅 . 沉积条件对大尺寸C/C复合材料沉积速率的影响[J]. 粉末冶金材料科学与工程, 2026 , 31(1) : 37 -47 . DOI: 10.19976/j.cnki.43-1448/TF.2025066

Abstract

C/C composites are widely used in aerospace due to their excellent high-temperature resistance. This work focused on the problem that the deposition rate and uniformity of pyrolytic carbon (PyC) during the chemical vapor infiltration (CVI) process affected by multiple parameters, established the finite element model of the double-chamber reactor, analyzed the concentration distributions of gas-phase components in the reactor via simulation, examined the influence rules of process temperature, inlet gas flow rate, and system pressure on large-size C/C composite PyC deposition reaction kinetics, and verified simulated results in conjunction with experiments. The results indicate that the simulated results exhibit the same trend as the experimental data with a maximum error of 9.65% in the average deposition rate, confirming the reliability of the finite element model. This work provides theoretical support for optimizing CVI process parameters and the efficient fabrication of large-size C/C composites.

Key words： chemical vapor infiltration; C/C composite; deposition rate; reaction kinetics simulation; computational fluid dynamics

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