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- W2009804877 abstract "The distribution of the boron oxides vapor in the combustion wave of the SHS system Mo+B has been studied by the dynamic mass spectrometry technique (DMS) to test the thermodynamically based hypothesis for the key role of gas-phase transport in solid-state combustion. The molecular beam sampling of the gases over the burning tablet was performed by a stationary probe cone from the moving combustion wave. Ion currents of boron oxides were recorded at 10–20 ms intervals that afforded spatial resolution of 0.1–0.2 mm. It has been found that the distribution of the boron oxides vapor pressure along the combustion wave corresponds to the known zones of preheating, reaction, and postcombustion. The rapid increase of B2O2 pressure takes place in the preheating zone as a result of the reaction B(s)+B2O3(g)→B2O2(g). Boron oxides are not observed over the reaction zone because of their complete decay in the reaction with Mo(s) to form molybdenum boride(s). The appearance of boron oxide vapors over the postcombustion zone is due to the evaporation of B2O3(l). The effective kinetic parameters are estimated from the data obtained. The results show that solid-state combustion of the Mo+B system proceeds predominantly through formation of gas-phase boron oxides." @default.
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- W2009804877 modified "2023-09-26" @default.
- W2009804877 title "A DMS kinetic study of the boron oxides vapor in the combustion front of SHS system Mo+B" @default.
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- W2009804877 doi "https://doi.org/10.1016/s0082-0784(06)80814-3" @default.
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