Ultrafast Pressure Sintering of Cf/SiC Composites Within 60 s

The widespread industrial adoption of carbon fiber-reinforced silicon carbide (C f /SiC) composites is currently hindered by the long processing cycles and high energy consumption of traditional fabrication methods. This study presents a novel ultrafast pressure sintering method for fabricating C f /SiC composites. Densified C f /SiC ceramic matrix composites (CMCs) were achieved in 60 s by using borosilicate as a liquid-phase sintering aid. Under optimal processing conditions, the resulting composites exhibited a bulk density of 2.06 g/cm 3 , open porosity of 2.64%, flexural strength of 188.1 ± 15.5 MPa, and fracture toughness of 5.96 ± 0.11 MPa·m 1/2 . This work presents a facile and ultrafast technique that significantly reduces the manufacturing time of C f /SiC composites, paving the way for their broader industrial applications.