论文部分内容阅读
采用热压工艺制备了SiO2－Si3N4复合材料，其抗弯强度和断裂韧性达到143MPa和1.7MPa·m1／2.比基体SiO2材料分别提高107％和70％.复合材料性能的改善是由于高弹性模量的Si3N4引入以及SiO2和Si3N4热膨胀系数不匹配导致的残余应力.
The flexural strength and fracture toughness of the composites were 143MPa and 1.7MPa · m1 / 2, respectively, which were higher than that of the matrix SiO2 by 107% and 70%, respectively. The improvement of composite properties was due to the high elasticity The introduction of Si3N4 moduli and the residual stress caused by the mismatch between the coefficients of thermal expansion of SiO2 and Si3N4.