Fracture behaviors and mechanism of 2D C/SiC-BCx composite under tensile load

Tensile fracture behaviors and mechanisms of 2D C/SiC-BCx composite were investigated. Results showed that the 2D C/SiC-BCx composite exhibited similar tensile strength (about 250 MPa), but different fracture mode and damage evolution compared to that of 2D C/SiC composite under similar monotonic tensile stress condition at room temperature. The initial modulus and fracture modulus of 2D C/SiC-BCx composite obtained under tensile cyclic loading at RT were about 98.6 GPa and 54.5 GPa, respectively. At high temperatures, the tensile strengths were lower than that at room temperature and behaved as a step-like stress–strain curve.

► Fracture behavior of 2D C/SiC-BCx composite at room temperature.
► Fracture mechanism of 2D C/SiC-BCx composite.
► Fracture behavior of 2D C/SiC-BCx composite at high temperature.