Evaluation of the Ignition Temperature in Thermal Explosion Synthesis of TiAl3 by Differential Scanning Calorimetry

Abstract

Abstract: Application of the Semenov theory of spontaneous ignition to evaluation of the critical temperature (T'c) in thermal explosion (TE) synthesis was conducted with the Ti-75at pct Al binary system using nonisothermal differential scanning calorimetry (DSC) at different heating rates. And the critical temperature for isothermal TE is predicted to be 728.9°C by the multiple linear regression of T'cs evaluated according to Semenov theory, which is close to the range of 740~745°C obtained from the isothermal DSC observation. This result proves that Semenov theory of spontaneous ignition is also feasible for TE synthesis in binary metallic systems like Ti-75 at. pct Al system.

Key words: Ignition temperature, DSC, Thermal explosion synthesis, TiAl

Tao WANG, Meili ZHU, Junshan ZHANG. Evaluation of the Ignition Temperature in Thermal Explosion Synthesis of TiAl3 by Differential Scanning Calorimetry[J]. J Mater Sci Technol, 2002, 18(04): 331-334.

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Evaluation of the Ignition Temperature in Thermal Explosion Synthesis of TiAl3 by Differential Scanning Calorimetry

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