Synthesis and deformation microstructure of Ti3SiAl0.2C1.8 solid solution

Solid solution Ti3SiAl0.2C1.8 was synthesized by sintering powder compacts containing Ti, Si, Al, and C with a mole ratio of 3:1:0.2:1.8 at 1550 °C for 5 min in Ar. X-ray diffraction and scanning electron microscopy were used to characterize the samples. The results show that nearly single solid solution was obtained except for the presence of a small amount of TiC. The observation from the fracture surface shows that delamination, kink band formation and crack deflection are prevalent features in the deformed Ti3SiAl0.2C1.8 grains. The crystal parameters for Ti3SiAl0.2C1.8 were analyzed and the multiple energy dissipation mechanisms were discussed.