Fabrication and mechanical evaluation of SiC-TiC nanocomposites by SPS

摘要

In the present study, the composites of SiC-TiC are prepared by spark plasma sintering (SPS) in vacuum without additive. The relationship of density and temperature of SiC-TiC composites with different content of TiC is studied. The maximum relative density reached was 98 percent. The mechanical properties of SiC-TiC composites with different content of TiC, which were sintered at 1800 deg C, have been evaluated. From the fracture surface observation, two models of fracture mechanisms of the composites existed: transgranular and intergranular.