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Comparison of thermal stability in MAX211 and 312 phases

Journal Article


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Abstract


  • The susceptibility of four MAX phases (Ti 2AlC, Cr 2AlC, Ti 3AlC 2, and Ti 3SiC 2) to high-temperature thermal dissociation in vacuum has been investigated using in-situ neutron diffraction. In high vacuum, these phases decomposed above 1400°C through the sublimation of M and A elements, forming a surface coating of MC. The apparent activation energies for the decomposition of sintered Ti 3SiC 2, Ti 3AlC 2, and Ti 2AlC were determined to be 179.3, -71.9, and 85.7 kJ mol -1, respectively. The spontaneous release of Ti 2AlC and TiC from de-intercalation during decomposition of Ti 3AlC 2 resulted in a negative activation energy.

Authors


  •   Pang, Wei Kong.
  •   Low, Itmeng (external author)
  •   O'Connor, Brian H. (external author)
  •   Studer, Andrew J. (external author)
  •   Peterson, Vanessa K. (external author)
  •   Sun, Zheng-Ming (external author)
  •   Palmquist, J P. (external author)

Publication Date


  • 2010

Citation


  • Pang, W. K., Low, I. M., O'Connor, B. H., Studer, A. J., Peterson, V. K., Sun, Z. M. & Palmquist, J. -P. (2010). Comparison of thermal stability in MAX211 and 312 phases. Journal of Physics: Conference Series, 251 (1), 012025-01-012025-04.

Scopus Eid


  • 2-s2.0-79953746662

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3180&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/2171

Has Global Citation Frequency


Start Page


  • 012025-01

End Page


  • 012025-04

Volume


  • 251

Issue


  • 1

Place Of Publication


  • United Kingdom

Abstract


  • The susceptibility of four MAX phases (Ti 2AlC, Cr 2AlC, Ti 3AlC 2, and Ti 3SiC 2) to high-temperature thermal dissociation in vacuum has been investigated using in-situ neutron diffraction. In high vacuum, these phases decomposed above 1400°C through the sublimation of M and A elements, forming a surface coating of MC. The apparent activation energies for the decomposition of sintered Ti 3SiC 2, Ti 3AlC 2, and Ti 2AlC were determined to be 179.3, -71.9, and 85.7 kJ mol -1, respectively. The spontaneous release of Ti 2AlC and TiC from de-intercalation during decomposition of Ti 3AlC 2 resulted in a negative activation energy.

Authors


  •   Pang, Wei Kong.
  •   Low, Itmeng (external author)
  •   O'Connor, Brian H. (external author)
  •   Studer, Andrew J. (external author)
  •   Peterson, Vanessa K. (external author)
  •   Sun, Zheng-Ming (external author)
  •   Palmquist, J P. (external author)

Publication Date


  • 2010

Citation


  • Pang, W. K., Low, I. M., O'Connor, B. H., Studer, A. J., Peterson, V. K., Sun, Z. M. & Palmquist, J. -P. (2010). Comparison of thermal stability in MAX211 and 312 phases. Journal of Physics: Conference Series, 251 (1), 012025-01-012025-04.

Scopus Eid


  • 2-s2.0-79953746662

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3180&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/2171

Has Global Citation Frequency


Start Page


  • 012025-01

End Page


  • 012025-04

Volume


  • 251

Issue


  • 1

Place Of Publication


  • United Kingdom