Skip to main content
placeholder image

Kinetics of Phase Decomposition in Ti4AlN3 and Ti2AlN - A Comparative Diffraction Study

Chapter


Abstract


  • A method for determining the kinetics of and the activation energy for the thermal

    dissociation of T12AIN and T14AIN3 in vacuum using in-situ time-of-flight (ToF) neutron diffraction

    is described. We discuss the thermal stability and phase transitions in Ti2AIN and Ti4AIN3. The 4th

    order polynomial function of time [y(t)=At4+Bt3+Ct2+Dt+E] is used to describe the isothermal

    decomposition and to calculate the mean value of the reaction rate constant at 1400, 1450, 1500,

    and 1550 °C. The rate constants at these four temperatures are used to determine the activation

    energy for the decomposition of Ti4AIN3 and Ti2AIN in vacuum using the Arrhenius equation,

    which are found to be 410.8 ± 50.0 and 573.8 ± 130 kj/mol, respectively.

UOW Authors


  •   Pang, Wei Kong
  •   Smith, R I. (external author)
  •   Peterson, Vanessa K. (external author)
  •   Low, Itmeng (external author)

Publication Date


  • 2012

Citation


  • Pang, W. K., Smith, R. I., Peterson, V. K. & Low, I. M. (2012). Kinetics of Phase Decomposition in Ti4AlN3 and Ti2AlN - A Comparative Diffraction Study. In D. Zhu, H. T. Lin & Y. C. Zhou (Eds.), Advanced Ceramic Coatings and Materials for Extreme Environments: A Collection of Papers Presented at the 35th International Conference on Advanced Ceramics and Composites, January 23-28 2011, Daytona Beach, Florida (pp. 177-183). Hoboken, New Jersey: John Wiley and Sons.

International Standard Book Number (isbn) 13


  • 9781118155820

Book Title


  • Advanced Ceramic Coatings and Materials for Extreme Environments: A Collection of Papers Presented at the 35th International Conference on Advanced Ceramics and Composites, January 23-28 2011, Daytona Beach, Florida

Start Page


  • 177

End Page


  • 183

Place Of Publication


  • Hoboken, New Jersey

Abstract


  • A method for determining the kinetics of and the activation energy for the thermal

    dissociation of T12AIN and T14AIN3 in vacuum using in-situ time-of-flight (ToF) neutron diffraction

    is described. We discuss the thermal stability and phase transitions in Ti2AIN and Ti4AIN3. The 4th

    order polynomial function of time [y(t)=At4+Bt3+Ct2+Dt+E] is used to describe the isothermal

    decomposition and to calculate the mean value of the reaction rate constant at 1400, 1450, 1500,

    and 1550 °C. The rate constants at these four temperatures are used to determine the activation

    energy for the decomposition of Ti4AIN3 and Ti2AIN in vacuum using the Arrhenius equation,

    which are found to be 410.8 ± 50.0 and 573.8 ± 130 kj/mol, respectively.

UOW Authors


  •   Pang, Wei Kong
  •   Smith, R I. (external author)
  •   Peterson, Vanessa K. (external author)
  •   Low, Itmeng (external author)

Publication Date


  • 2012

Citation


  • Pang, W. K., Smith, R. I., Peterson, V. K. & Low, I. M. (2012). Kinetics of Phase Decomposition in Ti4AlN3 and Ti2AlN - A Comparative Diffraction Study. In D. Zhu, H. T. Lin & Y. C. Zhou (Eds.), Advanced Ceramic Coatings and Materials for Extreme Environments: A Collection of Papers Presented at the 35th International Conference on Advanced Ceramics and Composites, January 23-28 2011, Daytona Beach, Florida (pp. 177-183). Hoboken, New Jersey: John Wiley and Sons.

International Standard Book Number (isbn) 13


  • 9781118155820

Book Title


  • Advanced Ceramic Coatings and Materials for Extreme Environments: A Collection of Papers Presented at the 35th International Conference on Advanced Ceramics and Composites, January 23-28 2011, Daytona Beach, Florida

Start Page


  • 177

End Page


  • 183

Place Of Publication


  • Hoboken, New Jersey