SiO_2-AlN复合材料的力学性能和显微结构  

MECHANICAL PROPERTIES AND MICROSTRUCTURE OF SiO_2-AlN COMPOSITES

作　　者：吴洁华[1] 李包顺[1] 郭景坤[1] 

机构地区：[1]中国科学院上海硅酸盐研究所,上海200050

出　　处：《复合材料学报》2001年第1期83-88,共6页Acta Materiae Compositae Sinica

摘　　要：热压制备了 Si O2 - Al N复合材料。第二相 Al N的引入有助于 Si O2 基复合材料力学性能的提高。 140 0℃下热压烧结的 30 vol% Al N- Si O2 复合材料的抗弯强度和断裂韧性分别达 2 0 0 MPa和 2 .96 MPa· m1 / 2 。 XRD分析说明直至 140 0℃ Si O2 与 Al N未发生化学反应 ,化学相容性好。利用 SEM和 TEM分析了 Si O2 - AlSiO 2 AlN composites were prepared by hot pressing process. Mechanical properties of SiO 2 matrix can be greatly improved after incorporating AlN particles. Flexural strength and fracture toughness of SiO 2 AlN composites with 30 vol% AlN particles sintered at 1400℃ reached 200 MPa and 2.96 MPa·m 1/2 respectively. XRD analysis indicated that no chemical reaction occurred between SiO 2 matrix and AlN particles suggesting that SiO 2 matrix had excellent chemical compatibility with AlN particles. Microstructure of the as sintered composites was investigated with SEM and TEM analysis. The relationship among the phase composition and microstructure and mechanical properties was discussed.

关 键 词：石英 氮化铝 复合材料 二氧化硅 天线窗 显微结构 力学性能 航空航天材料 

分 类 号：V257[一般工业技术—材料科学与工程] TB332[航空宇航科学与技术—航空宇航制造工程]