Oxidation kinetics of Ti3GeC2 MAX phase

Abstract

Abstract Present work reports the oxidation kinetics of Ti3GeC2 MAX phase. Two different methods were used: thermogravimetric analysis, and differential scanning calorimetry. To study the oxidation kinetics, pre-sintered samples were heated up to 1473\u2009K in air at different heating rates. The samples were nearly stable up to about 735\u2009K. It exhibits a non-linear oxidation behavior, i.e. different weight gains at different temperature regions. The data were analyzed separately using conventional kinetic models. Oxidation of Ti3GeC2 compound was characterized with different activation energies for different temperature ranges. Process was found to initiate with the formation of TiO2 followed by CO and GeO2.