Use of Zr–Ti Alloy Melt Infiltration for Fabricating Carbon-Fiber-Reinforced Ultrahigh-Temperature Ceramic Matrix Composites

Carbon-fiber-reinforced ultrahigh-temperature ceramic (C/UHTC) matrix composites are an attractive candidate for fabricating various hot structures. The present study aimed to establish a Si-free Zr–Ti melt-infiltration method C/UHTC composites. To achieve this, the wettability of alloys on carbon and their reactivity were examined. melted graphite plates infiltrated into model preforms, which made porous had median pore diameters 3 μm. results showed that apparent contact angle between C measured from in room temperature was ~20–42° preforms regardless Zr or Ti content. However, with increase content alloys, disappeared absorbed since higher than specific surface area preform carbon-fiber-reinforced composites, typical These clearly indicate not only capillary flow during infiltration but also should be considered process design high-density via infiltration.