Quasistatic Compression Properties of Fiber Hybrid Ceramic Matrix Composites with Different Hybrid Ratios and Fiber Dispersions

Fiber hybrid composites can give full play to the performance advantages of different component fibers, and hybrid weaving is one of the effective methods to improve the properties of composite materials. Herein, based on the flexible-oriented 3D woven technology, fiber hybrid ceramic matrix composites (FHCMCs) with different hybrid ratios and fiber dispersions are designed and fabricated, and their quasistatic compression properties, failure modes, and hybrid effects are studied. The results show that the reasonable hybrid of carbon (C) fiber and silicon carbide (SiC) fiber can make up for the shortcoming of single-fiber composites and improve the compression properties of FH-CMCs. The compressive failure modes of the FH-CMCs are mainly the crushing failure in the C fiber layers and shear failure of the specimen. For the compressive failure deformation, the positive hybrid effect gradually becomes obvious with the increase of fiber dispersion, but the compressive strength shows a negative hybrid effect as a whole. The improved rule of mixture by introducing different parameters has a better prediction effect for the compressive strength of the FH-CMCs. The research results provide experimental and theoretical reference for the high-performance manufacturing of hybrid composites in the future.