Phase segregation of titanium-aluminium carbide (Ti2AlC) at high pressure and high temperature

The high pressure and high temperature (HPHT) behavior and phase stability of titanium-aluminium carbide (Ti2AlC) were investigated using X-ray diffraction (XRD), differential scanning calorimetry (DSC), scanning electron micrograph (SEM), and energy-dispersive X-ray analysis (EDXA). The results show that the decomposition temperature of Ti2AlC decreases against pressure. At pressures of 3, 4 and 5 GPa, the low temperature limits of phase segregation of the sample Ti2AlC lie between 1300 and 1200 °C, 1100 and 1000 °C, 900 and 800 °C, respectively. The decomposition products are identified to be titanium carbide and titanium aluminium.