Thermodynamic Description of Chemical Reactions in the System Titanium-Aluminum-Hexamethylenetetramine under Self-Propagating High-Temperature Synthesis

Abstract

UDC 537.52:542.9:661.66

DOI  https://doi.org/10.5281/zenodo.3369687

On the basic of experimental and theoretical data, the thermodynamic analysis of possible chemical reactions taking place in the titanium-aluminum-hexamethylenetetramine system under conditions of self-propagating high-temperature synthesis has been performed. It is shown that in the conditions under consideration, the MAX phase Ti₃AlC₂ can predo-minantly form, which is possible under cooling of the material at a temperature lower than 1100 K. The highest negative values at T under 298 К are those of enthalpy and Gibbs energy of the reaction of combustion of hexamethylenetetramine combustion on the air, which allow the supposition that this reaction is the starting one for the investigated synthesis process.

Keywords: thermodynamic analysis, self-propagating high-temperature synthesis, titanium, aluminum, hexamethylenetetramine, MAX phases.