硅酸盐学报2009，Vol.37Issue(1)：138-144,7.
短碳纤维增强熔石英玻璃陶瓷复合材料力学性能
MECHANICAL PROPERTIES OF FUSED SILICA GLASS-CERAMIC COMPOSITES REINFORCED BY SHORT CARBON FIBERS
摘要
Abstract
According to the principle of manufacturing of fused silica composites reinforced by short carbon fibers, a mi-cro-mechanical model was developed to investigate the mechanical properties of the composites. The composites consisted of a fused silica matrix, Si3N4 grains and short carbon fibers. It was assumed that the composites have a periodic microstructure. The transverse Young's modulus, shear modulus and Poisson ratio of the composites were calculated by the two-scale expansion method. The nu-merical results agreed with the experimental data. The numerical results demonstrate that all the effective stiffness coefficients, the Young's modulus and the shear modulus increase at first and then decrease with the increase of the content of the carbon fiber. They reach a maximum when the fiber's volume fraction is 30%. The composites have optimal mechanical properties at a sintering tem-perature of 1 400 ℃ and the fiber volume fraction of 30%.关键词
复合材料/熔石英/短碳纤维/细观结构/力学性能Key words
composites/fused silica/short carbon fiber/microstructure/mechanical properties分类
通用工业技术引用本文复制引用
谭祥军,杨庆生,雷钧..短碳纤维增强熔石英玻璃陶瓷复合材料力学性能[J].硅酸盐学报,2009,37(1):138-144,7.基金项目
国家自然科学基金(1027206,30470439)资助项目. （1027206,30470439）
