Dynamic Compression Performance of Reaction Sintering SiC/B<sub>4</sub>C Composite

SiC/B 4 C composite was obtained using the reaction sintering method with Si infiltration, which exhibited excellent mechanical properties. The dynamic compressive response was investigated using a Split Hopkinson pressure bar at high strain rates ranging from 0.4×10 3 to 1.2×10 3 s -1 . The results show that the dynamic strength of the SiC/B 4 C composite obtains a peak value at a strain rate of 1000/s, while its strain increased continuously with increasing strain rate. The dynamic loading mode of SiC/B 4 C composite exhibited three deformation regions, including an inelastic deformation region, rapid loading region and failure region. The dynamic failure mode of SiC/B 4 C composite depended upon the strain rate.