C/C-SiC复合材料的氧化行为与等效弹性性能计算模型研究  

Oxidation behavior and effective elastic properties for the C/C-SiC composite during oxidation process

作　　者：汪海滨[1] 杨小锋[2] 杨绪印[1] 屈转利[1] 

机构地区：[1]中国航天科技集团公司四院41所,西安710025 [2]中国航天科技集团公司四院401所,西安710025

出　　处：《固体火箭技术》2012年第5期650-655,共6页Journal of Solid Rocket Technology

摘　　要：结合伴随化学反应的质量传递理论,研究了C/C-SiC复合材料的氧化机理,获得其氧化动力学模型。通过建立各材料组元(碳、碳化硅或其他材料)合理的氧化动力学方程,结合已有的C/C-SiC微结构参数化建模及性能预测技术,将氧化机理与微结构表征建模相结合,建立C/C-SiC复合材料在高温氧化环境下的弹性性能随温度、时间等参数变化动态预测模型,实现对高温环境下各种复杂构型C/C-SiC复合材料的性能预测研究。数值计算结果和实验数据吻合较好,表明该文建立的数值模型,可有效预测高温氧化环境下C/C-SiC的质量变化和等效弹性性能。The oxidation processes of C/C-SiC composites during oxidation in gaseous oxygen were studied theoretically.The oxidation model was developed according to the influences of temperature,width of micro crack in ceramic matrix and other factors on the oxidation.The finite element model of microstructure was established characterizing different oxidation behavior of C/C-SiC composite.The strain energy method was used to study the effects of the microstructure upon the oxidation performances of C/C-SiC composites.Numerical computing results for some cases of C/C-SiC composites agreed well with different experimental data.Results show that the models of C/C-SiC composites are effective to predict the elastic properties of C/C-SiC composites in oxidation environment.

关 键 词：C C-SiC复合材料 氧化机理 微结构 有限元模型 

分 类 号：V430[航空宇航科学与技术—航空宇航推进理论与工程]