【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 - Al N复合材料的显微结构及其补强机制更多还原

【Abstract】 SiO 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.更多还原