Chrono-topographical analysis of the laws of the microheterogeneous combustion mode for the production of powders by the SHS method

International Conference on Synthesis and Consolidation of Powder Materials

Dolmatov, A.V.^1

Ugra State University, Khanty-Mansiysk

628012, Russia^1

关键词: Combustion dynamics;    Combustion regime;    Combustion waves;    Micro-heterogeneous;    Propagation dynamics;    Scientific schools;    Topographic analysis;    Topographical analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/558/1/012009/pdf
DOI  :  10.1088/1757-899X/558/1/012009

来源: IOP

【 摘 要 】

The paper presents the capabilities of the chrono-topographical analysis method for studying the discrete nature of the propagation of the SHS process on the scale of the combustion focy and the reaction cell. Using the approach of chrono-topographic analysis, thermal imaging studies of the microheterogeneous mode of combustion in the Ni-Al system were carried out. The regularities of the dynamics of individual foci in the SHS wave are revealed. Using chronographic maps of the SHS process, it is shown that there are two types of foci in the combustion wave, which differ in the nature of the propagation dynamics. On the scale of the reaction cells, the experiment investigated the relationship of the combustion dynamics with the moments of the formation of new reaction sites. According to the results, it was concluded that an increase in the heat deficit in microheterogeneous combustion regimes leads to an increase in the dispersion of the resulting product. The work was supported by the Russian Foundation for Basic Research in research projects no. 18-08-01475, 18-08-01152, as well as grant no. 13-01-20/28 "Leading Scientific School of Ugra State University".