Kinetic study by TGA of the effect of oxidation inhibitors for carbon–carbon composite
Kinetic study by TGA of the effect of oxidation inhibitors for carbon–carbon composite
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DOI：
10.1016/s0921-5093(03)00302-2
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发表时间：
2003-10
期刊：
影响因子：
6.4
通讯作者：
C. Cairo;M. Florian;M. Graça;J. C. Bressiani
中科院分区：
文献类型：
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作者：
C. Cairo;M. Florian;M. Graça;J. C. Bressiani
在浸渍过程中向基体中加入玻璃化粒子可以抑制碳纤维增强碳复合材料的空气氧化腐蚀。抑制效果与玻璃在碳基体上的形成、润湿和铺展有关。玻璃充当碳活性位点上的阻挡物，形成防止氧扩散的薄保护屏障。这项工作旨在评估的影响，通过添加碳化硼和无定形硼的碳基体的抑制效果的复合成分的反应性。以酚醛树脂为基体，采用石墨化碳纤维和石墨化碳纤维制备了双向复合材料。通过热重分析仪测定复合材料的氧化失重，并通过Arrhenius图计算复合材料在空气中的氧化活化能。缓蚀效果取决于复合材料中各个组分的反应活性。
The corrosion by air oxidation of the carbon fiber reinforced carbon composites can be inhibited by adding glass-forming particles to the matrix during the impregnation process. The effectiveness of the inhibition is related to the formation, wetting and spreading of the glass on the carbon matrix. The glass acts as a blockage onto the carbon active sites forming a thin protection barrier against oxygen diffusion. This work intends to evaluate the influence of the reactivity of the composite components on the inhibition effectiveness obtained by the addition of boron carbide and amorphous boron to the carbon matrix. Bi-directional composites were obtained with carbon matrix derived from phenolic resin using both carbonized and graphitized carbon fibers. The oxidation resistance of the composites was carried out by a weight loss in a thermogravimetric analyzer and activation energy calculation through Arrhenius plot for oxidation in air. The inhibition effectiveness depended on the reactivity of the individual components of the composite.