Abstract
To improve the mechanical properties of C/C composites, the SiC(N)/TiC ceramic derived from single-source precursors (SSPs) were introduced into the C/C by precursor infiltration and pyrolysis (PIP) at 1100 °C. The shear strength of all modified composites were improved by nearly 2 times compared with the pristine C/C composites (37.4 MPa) due to the increased interfaces by multiphases incorporation. After further annealing at 1500 °C, the SiC(N)/TiC ceramic in C/C composite transferred into the nanocomposites, SiC(N)/TiC-NCs, in which nano-scale TiC particles distributed into the SiC(N) matrix. The modified samples still exhibited about 39% improvement on shear strength. Large numbers of uniform micro-cracks occurred in both above SSPs derived ceramic cases, reducing stress concentration during the shear testing. Moreover, some ring-shaped cracks were observed in the fracture region which can consume large amounts of energy in crack propagation process and then benefit to improve the shear strength.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
