热压工艺对SiC纤维增强TB8复合材料组织影响研究

通过箔-纤维-箔法制备了Si C纤维增强TB8复合材料,采用光学电子显微镜(OM)、扫描电镜(SEM)和电子探针(EPMA)对复合材料的微观组织进行表征与分析,研究了真空热压复

Effect of Hot Pressing Process on Microstructure of SiC Fiber-reinforced TB8 Composite

SiC fiber-reinforced TB8 composite was prepared by foil-fiber-foil method. The microstructure of composite was characterized by optical electron microscopy( OM),scanning electron microscopy( SEM) and electro probe microanalysis( EPMA),and the effect of pressure,temperature,time and other process parameters of vacuum hot pressing on the microstructure of SiC fiber-reinforced TB8 composite. The results show that pressure significantly affects the intermatrix bonding and the combination of matrix and SiC fiber. Temperature has a greater impact on the interface reaction between fiber and matrix. Through the optimization of process,the thickness of interface reaction layer can be effectively controlled,and the SiC fiber-reinforced TB8 composite with excellent microstructure can be obtained.