Dependence of the Burning Rates of Tapes of Ti + xB Mixtures on Boron Concentration

Resumo

The burning rate and combustion limits of tapes rolled from titanium-boron mixtures were determined as a function of the concentration of boron. The combustion of single tapes near the lower limit is unsteady and has a two-zone structure across the width of the tapes, due to the difference in burning and cooling rates between the edges of the tapes and its middle. With increasing boron concentration in the mixture, the combustion becomes steady-state and the front becomes more even. Maximum burning rate of the tapes is achieved at a boron concentration of 21-25% in the mixture.