Abstract
? 2022 Elsevier B.V.Cf/SiC and Cf/ZrC-SiC composites were fabricated via a novel combined process, which achieved a lower open porosity below 8% compared with the single PIP process. Nevertheless, Cf/SiC and Cf/ZrC-SiC composites did not possess the superior mechanical properties, but the poorer ones. Meanwhile, the veiled factors affecting the mechanical properties have been clarified. The large SiC particles (as large as ~40 μm) degraded the strength of matrix, thereby deteriorating mechanical properties of Cf/ZrC-SiC and Cf/SiC composites. Moreover, higher processing temperature (1700 °C) of the combined process and large CTE differences resulted in larger thermal residual stress in the composites compared with single PIP process with lower processing temperature (1200 °C), which also restrained the improvements of mechanical properties.
NSTL
Elsevier