A Marco-Homogenous and Micro-Heterogeneous Model for Self-Propagating High Temperature Synthesis (SHS)

Abstract:

Recently research shows that heterogeneous model is needed to explain some complex combustion behaviors in SHS. However, more heterogeneous details be considered more difficulties will be faced. A micro-heterogeneous & macro-homogeneous model is proposed in this paper based on some previous works for this problem. Combustion compact is divided into lots of little units, which are composed of a large number of small particles. Considering a well-mixed situation, properties of every unit must be almost the same, so the compact can be treated as a macro-homogeneous system on the scale of these little units. During the combustion, every unit will have a heterogeneous properties and change; it can be gotten by a micro-heterogeneous model. Therefore, the micro-heterogeneous characters are connected with the Marco-combustion behaviors. Combustion dynamics of Ti-C-Fe system was studied to certify this model. Results show well consistency with experiments results.

• Periodical: Materials Science Forum (Volumes 475-479)
• Pages: 3259-3262
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.475-479.3259
• Online since: January 2005
• Authors: Jin Yong Zhang, Zheng Yi Fu, Wei Min Wang, Qing Jie Zhang
• Keywords: Combustion Dynamcis, Heterogeneous Model, SHS

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