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Stability of titanium-aluminium nitride (Ti2AlN) at high pressure and high temperatures

  • Pei An (安佩)
  • Zhilei He
  • Jiaqian Qin
  • Ziyang Li
  • Yongjun Li
  • Zili Kou (寇自力)
  • Duanwei He
Article

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.

Key words

Ti2AlN high pressure and high temperature stability X-ray diffraction 

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Copyright information

© Wuhan University of Technology and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Pei An (安佩)
    • 1
  • Zhilei He
    • 2
  • Jiaqian Qin
    • 1
  • Ziyang Li
    • 1
  • Yongjun Li
    • 1
  • Zili Kou (寇自力)
    • 1
  • Duanwei He
    • 1
  1. 1.Institute of Atomic and Molecular PhysicsSichuan UniversityChengduChina
  2. 2.College of Materials Science and EngineeringWuhan University of TechnologyWuhanChina

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