Rare Metals

, Volume 33, Issue 5, pp 527–533 | Cite as

Kinetics and numerical simulation of self-propagating high-temperature synthesis in Ti–Cr–Al–C systems

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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.

Keywords

Self-propagating high-temperature synthesis Temperature distribution Flame-front propagating velocity Numerical simulation 
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Notes

Acknowledgments

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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Copyright information

© The Nonferrous Metals Society of China and Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Guo-Bing Ying
    • 1
  • Xiao-Dong He
    • 2
  • Shan-Yi Du
    • 2
  • Yong-Ting Zheng
    • 2
  • Chun-Cheng Zhu
    • 3
  • Yu-Ping Wu
    • 1
  • Cheng Wang
    • 1
  1. 1.Institute of Metals and Protection, College of Mechanics and MaterialsHohai UniversityNanjingChina
  2. 2.Center for Composite Materials and StructureHarbin Institute of TechnologyHarbinChina
  3. 3.College of Chemistry and Chemical EngineeringHarbin Normal UniversityHarbinChina

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