34. Effect of Oxygen Partial Pressure on the Phase Stability of Ti3SiC2

  1. Manuel E. Brito,
  2. Peter Filip,
  3. Charles Lewinsohn,
  4. Ali Sayir,
  5. Mark Opeka and
  6. William M. Mullins
  1. I. M Low1,
  2. Z. Oo1,
  3. B. H. O'Connor1 and
  4. K. E. Prince2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291283.ch34

Developments in Advanced Ceramics and Composites: Ceramic Engineering and Science Proceedings, Volume 26, Number 8

Developments in Advanced Ceramics and Composites: Ceramic Engineering and Science Proceedings, Volume 26, Number 8

How to Cite

Low, I. M., Oo, Z., O'Connor, B. H. and Prince, K. E. (2005) Effect of Oxygen Partial Pressure on the Phase Stability of Ti3SiC2, in Developments in Advanced Ceramics and Composites: Ceramic Engineering and Science Proceedings, Volume 26, Number 8 (eds M. E. Brito, P. Filip, C. Lewinsohn, A. Sayir, M. Opeka and W. M. Mullins), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291283.ch34

Author Information

  1. 1

    1Materials Research Group, Department of Applied Physics, Curtin University of Technology, GPO Box U1987, WA 6845 Australia

  2. 2

    ANSTO, PMB 1, Menai, NSW 2234 Australia

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2005

ISBN Information

Print ISBN: 9781574982619

Online ISBN: 9780470291283

SEARCH

Keywords:

  • topotactic;
  • neutron;
  • vacuum;
  • composition;
  • synchrotron

Summary

The thermal stability and topotactic transition of Ti3SiC2 in vacuum, argon and air have been investigated by synchrotron radiation diffraction (SRD), in-situ neutron diffraction (ND) and secondary ion mass spectroscopy (SMS). In the presence of a low oxygen partial pressure such as in vacuum or argon, Tl3SlC2 undergoes a surface dissociation to form non-stoichiometric TiC and/or Ti5Si3C at 1200°C. In contrast, it forms non-stoichiometric surface oxides of rutile at 1000°C and cristobalite at 1300°C when exposed to an oxygen-rich environment. Near-surface depth profiling of vacuum-treated Tl3SiC2 by SIMS has revealed a distinct gradation in phase composition and confirmed the existence of Ti5Si3C in solid solution with oxygen.