Abstract
In this paper, Ti–Cr–Al–C materials were investigated by self-propagating high-temperature synthesis (SHS) according to the experimental study and numerical simulation results. The highest adiabatic combustion temperature T ad of 2,467.45 K indicates that the 2Ti–0Cr–Al–C is the highest exothermic reaction system in the Ti–Cr–Al–C system. The adiabatic combustion temperature decreases with the increase of the Cr content. And a higher exothermal reaction would result in higher porosity which is induced by the high temperature and pressure of C reducing atmosphere and Al vapor. Combustion characterization of the products shows that the geometrical alternating layers result in the high exothermal reaction and flame-front propagating velocity. The higher the T ad is, the thinner the layer is. To demonstrate the process of the microscopic characterization and show the detailed combustion process closed to the experimental observations, the flame-front propagating velocity and temperature distribution were simulated numerically.
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This work was financially supported by the National Natural Science Foundation of China (Nos. 11302068 and 51172057) and China Postdoctoral Science Foundation (No. 2013M541261).
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Ying, GB., He, XD., Du, SY. et al. Kinetics and numerical simulation of self-propagating high-temperature synthesis in Ti–Cr–Al–C systems. Rare Met. 33, 527–533 (2014). https://doi.org/10.1007/s12598-013-0205-z
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DOI: https://doi.org/10.1007/s12598-013-0205-z