Based on taking combustion synthesis to prepare high-performance TiC-TiB2 composite in high-gravity field, joint of TiC-TiB2 with stainless steel and Ti-6Al-4V alloy were achieved respectively by the introduction of stainless steel and Ti alloy plates at the bottom of combustion system. Instant melting at surface part of stainless steel and Ti alloy, followed by atom diffusion between liquid TiC-TiB2 ceramic and the molten metal was considered a reason for the achievement of the joint. Because of the presence of both coarsened Al2O3 inclusions nearby the ceramic and the partition layers of Al2O3 between the ceramic and the intermediate, shear strength of joint between the ceramic and stainless steel presented a low value of 120 ± 30 MPa. In contrast, because of the interdiffusion of C, B and Ti atoms between the liquid ceramic and the molten Ti alloy, ultrafine-grained microstructure develops in the ceramic nearby the joint, while the joint characterized by constitutional continuous gradient is also achieved from the ceramic to Ti alloy, resulting in high shear strength of 650 ± 25 MPa between TiC-TiB2 ceramic and Ti-6Al-4V alloy.
Potential of ultrafine grained materials as high performance penetrator materials
