摘要
建立了C/C预制体孔隙率与C/SiC复合材料组成的关系模型,并通过表征不同孔隙率的C/C预制体气相硅浸渗制备的C/SiC复合材料的组成和力学性能对模型进行了验证。研究发现,实验结果与模型预测结果基本一致。随着C/C预制体孔隙率的增大,C/SiC复合材料的密度出现先上升后下降的规律,力学性能也遵从同样的规律。XRD分析和相含量测试结果均表明复合材料的相含量与模型预测结果基本一致。实验结果与模型预测结果产生偏差的主要原因是裂解碳反应不完全。
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.
出处
《玻璃钢／复合材料》
CAS
CSCD
北大核心
2013年第2期52-56,共5页
Fiber Reinforced Plastics/Composites
基金
国防科技预研基金(9140c820301)
关键词
C
C
C
SiC
孔隙率
模型
气相硅浸渗
C/C
C/SiC
porosity
model
gaseous silicon infiltration
