Ignition and combustion of boron in wet and dry atmospheres

摘要: A description of ignition and combustion boron particles is developed with the aim obtaining a theory that as simple possible yet consistent available data. For stage model involves equilibrium reactive dissolution B in thin B2O3(l) layer to form dissolved BO, for example, surface attack BO by O2(g) H2O(g) BO2(g), HOBO(g), respectively, vaporization B2O3, later clean-surface B2O2(g). mode only last these processes. Values relevant rate constants are identified achieve agreement experiments. Early laser-ignition experiments, not previously explained quantitatively, employed needed dry-gas parameters. New experiments on suspensions hot products flat-flame burner performed test adopted values wet-gas Results provide basis calculation propulsions applications.