Abstract
Reactive sintering of 8Ti:Al 4C 3:C powder mixtures to form the ternary carbide Ti 2AlC is studied in the temperature range 570–1400 °C. After sintering at 1400 °C for 1 h, only the MAX phase Ti 2AlC and some TiC are produced. A series of intermediate phases, such as TiC, Ti 3Al, Ti 3AlC are detected during the reactive sintering process. From X-ray diffraction (XRD) and scanning electron microscopy (SEM) characterizations, a reaction path is proposed for the intermediate phases and Ti 2AlC formation. Results show that reaction kinetics may play an important role in the understanding of the reaction mechanisms.
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