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Effect of Fe2O3 as an accelerator on the reaction mechanism of Al-TiO2 nanothermite system

Journal Article


Abstract


  • Thermite reactions between aluminum and metal oxides could lead to the formation of intermetallic matrix composites used in high-temperature industrial applications. Thermite reaction in Al-TiO2 system needs a considerable amount of energy to take place by mechanochemical or by the combustion synthesis (CS) method due to the low amount of reaction enthalpy in Al-TiO2 system. In this study, Fe2O3 was chosen as a accelerator for this system, to generate a high amount of heat which could be released between Fe2O3 and Al, leading to a more convenient reaction between Al and TiO2 in the CS process. The results of XRD, SEM, and DSC analyses indicated that both the mechanical activation of Al-TiO2 system in a high-energy ball mill and the Fe2O3 addition led to considerable effects of reduction in the reaction temperature and increase in the reaction intensity in Al-TiO2 nanothermite system. Finally, it was shown that Fe3Al intermetallic compounds as well as γ-AlTi and alumina phases in the final products were formed after the CS of the milled powders.

UOW Authors


  •   Mousavian, R Taherzadeh. (external author)
  •   Azizi, N (external author)
  •   Jiang, Zhengyi
  •   Fadavi Boostani, Alireza (external author)

Publication Date


  • 2014

Citation


  • Mousavian, R. Taherzadeh., Azizi, N., Jiang, Z. & Boostani, A. Fadavi. (2014). Effect of Fe2O3 as an accelerator on the reaction mechanism of Al-TiO2 nanothermite system. Journal of Thermal Analysis and Calorimetry: an international forum for thermal studies, 117 (2), 711-719.

Scopus Eid


  • 2-s2.0-84904463267

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/2962

Number Of Pages


  • 8

Start Page


  • 711

End Page


  • 719

Volume


  • 117

Issue


  • 2

Abstract


  • Thermite reactions between aluminum and metal oxides could lead to the formation of intermetallic matrix composites used in high-temperature industrial applications. Thermite reaction in Al-TiO2 system needs a considerable amount of energy to take place by mechanochemical or by the combustion synthesis (CS) method due to the low amount of reaction enthalpy in Al-TiO2 system. In this study, Fe2O3 was chosen as a accelerator for this system, to generate a high amount of heat which could be released between Fe2O3 and Al, leading to a more convenient reaction between Al and TiO2 in the CS process. The results of XRD, SEM, and DSC analyses indicated that both the mechanical activation of Al-TiO2 system in a high-energy ball mill and the Fe2O3 addition led to considerable effects of reduction in the reaction temperature and increase in the reaction intensity in Al-TiO2 nanothermite system. Finally, it was shown that Fe3Al intermetallic compounds as well as γ-AlTi and alumina phases in the final products were formed after the CS of the milled powders.

UOW Authors


  •   Mousavian, R Taherzadeh. (external author)
  •   Azizi, N (external author)
  •   Jiang, Zhengyi
  •   Fadavi Boostani, Alireza (external author)

Publication Date


  • 2014

Citation


  • Mousavian, R. Taherzadeh., Azizi, N., Jiang, Z. & Boostani, A. Fadavi. (2014). Effect of Fe2O3 as an accelerator on the reaction mechanism of Al-TiO2 nanothermite system. Journal of Thermal Analysis and Calorimetry: an international forum for thermal studies, 117 (2), 711-719.

Scopus Eid


  • 2-s2.0-84904463267

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/2962

Number Of Pages


  • 8

Start Page


  • 711

End Page


  • 719

Volume


  • 117

Issue


  • 2