Abstract
Abstract: The microstructural composition during the formation of Ti3AlC2 was examined at temperatures ranging from 900 °C to 1400 °C from the mixture of Ti/Al/2TiC (abbreviated as ‘2TiC’) and 3Ti/ A1/2C (abbreviated as ‘0TiC’). Based on the results of X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDS), a possible reaction mechanism was proposed. Experimental results showed that the formation of Ti3AlC led to a complex reaction route, and made formation temperature of Ti3AlC2 higher than that in the mixture of 2TiC. It is clear from the results of this study that minimizing the formation of intermediate phases during the synthesis of Ti3AlC2 helps to shorten the synthesis time, to reduce processing temperature, as well as to increase the purity for Ti3AlC2. Therefore, the formation of Ti3AlC as intermediate carbide is not favourable for the synthesis of high-purity Ti3AlC2.
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