热解炭
材料科学
化学气相渗透
复合材料
大气温度范围
分压
碳纤维
蒸汽压
碳化硅
化学气相沉积
复合数
热解
氧气
化学
热力学
纳米技术
物理
有机化学
作者
Ning,Shen Dong,Yongdong,Jiang Xu,Laifei,Wood-Hi Cheng,Litong,Bo Zhang
出处
期刊:材料科学技术学报:英文版
日期:2003-01-01
卷期号:: 77-80
摘要
A series of 3D-C/SiC composites with different pyrolytic carbon (PyC) interracial layers (about 20~300 nm thick)were prepared by chemical vapor infiltration. Simulation experiments at different temperatures were performed byexposing C/SiC specimens in single and coupling gases partial pressure atmospheres, namely, O2, H2O vapor andmolten salt (Na+) vapor. It suggested that at intermediate temperature range (about 600~800℃) a dramatic effectof PyC thickness on the weight and strength change of C/SiC was shown, which was mainly influenced by O2 partialpressure; at high temperature range (about 1200~1300℃) the effect was not obvious relatively, which might beinfluenced by H2O vapor partial pressure; and finally at very high temperature range (>1500℃) the molten saltvapor was the factor of most possibility affecting the weight change of C/SiC.
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