Effect of the mass fraction of a binder in a thermal protective coating on the heat and mass exchange with a high-enthalpy gas flow

The properties of two modifications of a thermal protective coating based on phenolformaldehyde resin and carbon fabric with various portions of the components were studied experimentally. The results are used for mathematical simulation of the ablation of the materials during thermochemical degradation in a high-enthalpy gas flow. It is shown that a decrease in the mass fraction of the polymer binder has an ambiguous effect on the rate of ablation because of changes in thermal characteristics and increase in the thickness of the reacting layer under long-duration external thermal action.