| 脉冲FCVI制备炭/炭复合材料的氧化行为 |
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| 引用本文： | 陈强,张守阳.脉冲FCVI制备炭/炭复合材料的氧化行为[J].炭素技术,2011,30(6):5-8. |
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| 作者姓名： | 陈强 张守阳 |
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| 作者单位： | 1. 宝鸡文理学院化学化工系,陕西宝鸡,721013
2. 西北工业大学材料科学与工程学院,陕西西安,710072 |
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| 基金项目： | 国家自然科学基金(90716024); 宝鸡文理学院重点科研项目(Zk065) |
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| 摘 要： | 采用脉冲强制流动热梯度化学气相渗透工艺(IFCVI)制备了炭/炭复合材料(C/C复合材料),利用等温氧化实验对C/C复合材料在不同温度(673～1173 K)条件下的氧化行为进行了研究,并借助于扫描电子显微镜观察了C/C复合材料的氧化形貌.实验结果表明:C/C复合材料的基体在氧化反应中优先氧化,氧化反应速率随温度的升高而增大；在高于或低于临界温度973 K时,C/C复合材料的氧化反应分别受2种不同机制控制,其反应活化能分别为1.29×105 J/mol和2.94× 104 J/mol.
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| 关 键 词： | C/C复合材料 脉冲FCVI 氧化 |
Oxidation behavior of Carbon/Carbon composites prepared by impulse forced flow thermal gradient chemical vapor infiltration |
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| CHEN Qiang
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ZHANG Shou-yang.Oxidation behavior of Carbon/Carbon composites prepared by impulse forced flow thermal gradient chemical vapor infiltration[J].Carbon Techniques,2011,30(6):5-8. |
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| Authors: | CHEN Qiang ZHANG Shou-yang |
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| Affiliation: | CHEN Qiang1,ZHANG Shou-yang2 (1.Dept.Chem.& Chem.Eng.,Baoji college of Arts and Science,Shaanxi Baoji 721013,China,2.School of Materials Science and Engineering,Northwestern Polytechnic University,Shaanxi Xi'an 710072,China) |
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| Abstract: | Carbon/Carbon(C/C) composites were prepared by impulse forced-flow-thermal gradient chemical vapor infiltration(IFCVI),and the isothermal oxidation was used to study the oxidation kinetics of the C/C composites at different temperatures(673～1 173 K).The oxidation morphology of the C/C composites was observed by SEM.The experimental results show that in the oxidation process of C/C composites,oxidation reactions begin from the carbon matrix and the oxidation rate increases with the increase of oxidation temperatures;when the oxidation temperature is below or above 973 K,the corresponding apparent active energies are 1.29×105 J/mol and 2.94×104 J/mol. |
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| Keywords: | Carbon/Carbon composites IFCVI oxidation |
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