Rapid fabrication of in situ TiC particulates reinforced Fe-based composites by spark plasma sintering

摘要

TiC particulates reinforced Fe-based composites have been fabricated using ferrotitanium and carbon black powders with the combination of in situ and spark plasma sintering (SPS) technique. The sintering and densification behaviors were investigated. The results show that when the composite was sintered at 1150 ℃ for 5 min, the maximum relative density and hardness are 99.2% and 83.2 HRA. respectively. The phase evolution during sintering indicates that the in situ reaction occurs evidently between 850 ℃ and 1050 ℃. The microstructure investigation demonstrates that with the rapid in situ SPS technique, fine TiC particulates with a size of -1 μm are homogeneously distributed in the matrix.