A gas-dynamic model of the formation of open and closed porosity of materials under the conditions of combustion of an SHS system, when there is a liquid phase (which can boil under certain conditions), the pressure of impurity gases, vapor of the liquid phase, external pressure or vacuum, is considered. It is shown that there is a critical pressure that characterizes the transition boundary between closed and open porosity. Experimental studies for the Ti - C system showed that the size of the open pores of the synthesized sample, measured over the sample volume, correlates with the calculated values ??that were obtained when considering the gas-dynamic model of the formation of open porosity using the theory of cavitation. Il. 3, bibliography: 9 titles.
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