Development and oxidation resistance of continuous SiC fiber-reinforced porous SiC matrix (SiC/porous SiC) composites with high strength and ductility

连续SiC纤维增强多孔SiC基（SiC/porous SiC）复合材料是一种新的材料概念，是为了开发具有高抗氧化、耐腐蚀和1000 ℃以上高温强度的超高温材料而提出的。在这项研究中，创新的SiC基复合材料没有任何界面之间的纤维和基体像碳已经成功地开发。由于纤维/基体界面脱粘增强和脱粘界面摩擦应力的作用，复合材料表现出伪韧性行为和复杂的断裂行为。将多孔SiC复合材料暴露在高达1100 ℃的高温下的空气中。没有观察到弯曲强度的明显降解相比，收到的材料。从降低生产成本的角度提出了另一种制造路线，并进行了论证。

New material concept of continuous SiC fiber-reinforced porous SiC matrix (SiC/porous SiC) composites has been invented for the development of ultra-high temperature materials with high oxidation/corrosion resistance and excellent high-temperature strength over 1000 C. In this study, innovative SiC-based composites without any interface between fiber and matrix like carbon have been successfully developed. The composites showed pseudo-ductile behavior and complicated fracture behavior due to enhanced debonding at fiber/matrix interface and frictional stress at the debonded fiber/matrix interface. The porous SiC composites were exposed at elevated temperature up to 1100 C in air. No apparent degradation of flexural strength was observed compared to that of the as-received material. Another fabrication route have been proposed from the view point of the reduced production cost and demonstrated.