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中文摘要：
通过高温等温氧化实验,对自制涂层碳/碳复合材料的氧化机理进行了研究。研究结果表明,涂层碳/碳复合材料的等温氧化可分为4个阶段。氧化初期,涂层的表面开始氧化,氧化失重是一个受氧气和涂层的化学反应控制,表现为氧化增重;氧化中期,氧化失重受玻璃质的形成速度和蒸发速度控制,表现为缓慢的氧化失重,氧化失重与时间的关系为直线型;随后,涂层上出现裂纹的形成和愈合过程,涂层深层被氧化,表现为较快的氧化失重;最后,涂层被局部破坏,基体被部分氧化,氧化失重直线上升。
英文摘要：
The oxidation process and mechanism of the coated C/C composites were studied by the high temperature oxidation test in this paper.The results showed that the oxidation of the coated C/C composites could be divided into four steps.Firstly the oxidation loss was controlled by the reaction between the coated C/C composites and oxygen.Secondly the oxidation loss was controlled by the producing and vaporing rate of the glass.The oxidation loss was lined with the oxidation time.Thirdly there were cracks in the coating and the deep of the coating was oxidated.The weight loss rate increased linearly and the matrix had been oxidated partly in the end.
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