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Study of high-temperature thermal stability of MAX phases in vacuum

Conference Paper


Abstract


  • The susceptibility of two MAX phases (Ti2AlN and Ti 4AlN3) to high-temperature thermal dissociation in a dynamic environment of high-vacuum has been investigated using in-situ neutron diffraction. In high vacuum, these phases decomposed above 1400��C through the sublimation of Ti and Al elements, forming a surface coating of TiN. The kinetics of isothermal phase decomposition was modelled using the Avrami equation and the Avrami exponent (n) of isothermal decomposition of Ti 2AlN and Ti4AlN3 was determined to be 0.62 and 0.18 respectively. The characteristics of thermal stability and phase transitions in Ti2AlN and Ti4AlN3 are compared and discussed.

Publication Date


  • 2010

Citation


  • Low, I. M., Pang, W. K., Kennedy, S. J., & Smith, R. I. (2010). Study of high-temperature thermal stability of MAX phases in vacuum. In Ceramic Engineering and Science Proceedings Vol. 31 (pp. 171-180). doi:10.1002/9780470944103.ch17

Scopus Eid


  • 2-s2.0-79952424809

Start Page


  • 171

End Page


  • 180

Volume


  • 31

Issue


  • 10

Place Of Publication


Abstract


  • The susceptibility of two MAX phases (Ti2AlN and Ti 4AlN3) to high-temperature thermal dissociation in a dynamic environment of high-vacuum has been investigated using in-situ neutron diffraction. In high vacuum, these phases decomposed above 1400��C through the sublimation of Ti and Al elements, forming a surface coating of TiN. The kinetics of isothermal phase decomposition was modelled using the Avrami equation and the Avrami exponent (n) of isothermal decomposition of Ti 2AlN and Ti4AlN3 was determined to be 0.62 and 0.18 respectively. The characteristics of thermal stability and phase transitions in Ti2AlN and Ti4AlN3 are compared and discussed.

Publication Date


  • 2010

Citation


  • Low, I. M., Pang, W. K., Kennedy, S. J., & Smith, R. I. (2010). Study of high-temperature thermal stability of MAX phases in vacuum. In Ceramic Engineering and Science Proceedings Vol. 31 (pp. 171-180). doi:10.1002/9780470944103.ch17

Scopus Eid


  • 2-s2.0-79952424809

Start Page


  • 171

End Page


  • 180

Volume


  • 31

Issue


  • 10

Place Of Publication