Processing and characterization of 2D woven ZrB2‐based ultrahigh‐temperature ceramic matrix composites

Abstract

AbstractCf‐ZrB2 and Cf‐ZrB2–SiC ultrahigh‐temperature ceramic matrix composites were produced using slurry infiltration in the 2D woven carbon fabric and hot pressing at 2000°C. The mixing time and amount of solid loading of the ZrB2–SiC slurry were found to have a significant effect on both microstructure and mechanical properties and were optimized to obtain an agglomerate‐free composite. The ZrB2–SiC slurry with a solid loading of 20%–30% was found to be effective for infiltration within the intra‐pore in carbon tows. The composites have a nearly completely dense matrix layer with a porous matrix within the fiber layers. The fabricated 2D woven Cf‐ZrB2 and Cf‐ZrB2–SiC composites were non‐brittle.