陶瓷/树脂/纤维超混杂复合材料的界面控制

以具有不同表面状态的泡沫SiC陶瓷为基本骨架,以改性酚醛树脂为基体,加入短切高硅氧玻璃纤维制备了陶瓷/纤维/树脂超混杂复合材料,研究了界面控制对超混杂复合材料界面粘结强度的影响.结果表明,对于泡沫SiC陶瓷骨架,在表面生长多孔过渡层或表面堆积SiC颗粒等方法可提高树脂陶瓷之间界面的粘结强度.通过良好的界面控制,可显著提高复合材料的弯曲强度和弯曲模量,模量的提高比强度的提高幅度更大.偶联剂处理使高硅氧纤维与树脂基体的粘结强度增加,从而提高复合材料的弯曲强度.

Interfacial control of ceramics/resin/fibers super--hybrid composite

A novel super-hybrid composite was prepared with foam SiC ceramics, high performance fibers and modified phenolic resin. The surface treatment of fibers and foam SiC ceramics and interface adhesive states between matrix and foam ceramics were investigated with mechanical prop-erties of super-hybrid composite and SEM analysis. The results show that interfacial cohesive stat?between foam SiC ceramics and resin is better when the surface of foam SiC ceramics with porous transition layer or particles of SiC than that when the surface of foam SiC ceramics with whiskers or untreated. Flexural strength and modulus of super-hybrid composite can be improved greatly by the better interfacial control. And the increasing rate of flexural modulus is more than that of flexural strength. After high silica fiber is treated by coupling agent, excellent interfacial cohesion and flexural strength of super-hybrid composite are obtained.