硅酸盐学报2007，Vol.35Issue(5)：537-540,545,5.
石英纤维织物增强氮化物陶瓷基复合材料的性能
PERFORMANCE OF BRAIDED SILICA FIBER-REINFORCED NITRIDE-BASED CERAMIC COMPOSITES
摘要
Abstract
Using the polymeric precursor impregnation and pyrolysis method, 2.5-dimensional braided silica fiber-reinforced nitride-based composites (2.5D-SRNCs) were prepared. The mechanical properties, thermal properties, and ablative properties of the 2.5D-SRNCs were evaluated. The effect of silica fiber volume content and pyrolysis temperature on the flexural strength of the 2.5D-SRNCs was studied. The composites have better mechenical and ablative resistant properties. The results show that flexural strength increases with the increase of fiber volume content and decreases with the increase of pyrolysis temperature. The longitude flexural strength of the 2.5D-SRNCs reach the maximum value (134.6 MPa) with a fiber volume content of 48% and pyrolysis temperature of 800 ℃. The 2.5D-SRNCs have a low linear ablation rate of 0.038 mm/s and no fused layer accumulation or delamination was found on the ablation surface. The pseudoplasticity and toughening of the 2.5D-SRNCs occur by the mechanism of the absorption of much fracture energy by the fiber/matrix interface debonding and the pulling out of fiber.关键词
石英纤维织物/复合材料/性能Key words
braided silica fibers/composites/performance分类
通用工业技术引用本文复制引用
姜勇刚,张长瑞,曹峰,王思青..石英纤维织物增强氮化物陶瓷基复合材料的性能[J].硅酸盐学报,2007,35(5):537-540,545,5.基金项目
国防科技大学新型陶瓷纤维及其复合材料国防科技重点实验室基金(2004js51488.0101.kg01.3)和研究生创新基金(0603)资助项目. （2004js51488.0101.kg01.3）
