ABOUT NONUNIQUENESS OF COMBUSTION MODES IN THE HETEROGENEOUS SYSTEMS

The multiple chemical reaction paths taking place in the combustion wa ve of the ternary heterogeneous systems (Ti-N-2-O-2 and Nb-B-O-2), wer e experimentally studied. The Time-Resolved X-Ray Diffraction method w as used for in-situ investigation of the mechanisms of phase formation during combustion in these systems. Ir was shown, that variation of t he ignition temperature may lead to the significant changes of combust ion temperature and velocity. It was experimentally confirmed that, th is effect of nonuniqueness of the combustion parameters is a result of change in the chemical reaction path occurring in the combustion fron t. Analysis of the obtained data showed that this changing of reaction path may be a result of either thermodynamic or kinetic consideration s depending on the investigated system.