Abstract
The stability of Ti2AlN at high pressure of 5 GPa and different temperatures of 700–1 600 °C was investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM) equipped with an energy dispersive spectrometer (EDS). Ti2AlN was found to be stable at temperatures as high as 1 400 °C under 5 GPa for 20 min, and was proved that it held better structure stability than Ti2AlC under 5 GPa through comparative experiments of Ti2AlN and Ti2AlC (representative compounds of M 2 AX phases (211 phase)). The reaction process at high pressure had some difference from that at ambient pressure/vacuum, and Ti2AlN directly decomposed to TiN and TiAl at 5 GPa and 1 500 °C for 20 min. Moreover, the mechanism of phase segregation was discussed. In addition, the behavior of Ti2AlN contacting with Zr at high pressure and high temperature (HPHT) was also studied.
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An, P., He, Z., Qin, J. et al. Stability of titanium-aluminium nitride (Ti2AlN) at high pressure and high temperatures. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 26, 914–919 (2011). https://doi.org/10.1007/s11595-011-0336-8
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DOI: https://doi.org/10.1007/s11595-011-0336-8