The synthesis of Ti 3 Al(Sn)C 2 usually uses elemental powder as the raw material, and the synthesis temperature is up to 1500°C. Low-temperature ceramic sintering is the key to inhibit the formation of competitive phases and reduce the ceramic sintering cost. In this paper, a new method of low-temperature synthesis of Ti 3 Al(Sn)C 2 was proposed, and high-purity Ti 3 Al(Sn)C 2 sample was successfully prepared at low temperature by using the replacement reaction method. Research shows that the temperature of 600°C for 5 h is the optimal process conditions for Ti 3 Al(Sn)C 2 synthesis. Furthermore, the introduction of Sn changed the high-temperature oxidation resistance of Ti 3 AlC 2. Compared to pristine Ti 3 AlC 2 , the oxidation resistance of Ti 3 Al(Sn)C 2 at 900°C increases by 33%. The comparative analysis of the formation energy of replacement Ti sites and Al sites shows that the formation energy of Sn-replaced Al sites is lower. These results have broad reference implications for low-temperature synthesis of other MAX phases.
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