摘要：Presented herein is an experimental study on the combustion of B 4 C/KNO 3 binary pyrotechnic system. Combustion products were tested using X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive spectrometer (EDS). According to the results of tests and CEA calculation, the combustion reaction equation was established. The flames and burning rates were recorded by a high speed camera and a spectrophotometer. The effect of B 4 C particle size on the thermal sensitivity of B 4 C/KNO 3 was investigated by differential scanning calorimetry (DSC) techniques. In addition, a reliable method for calculating the flame temperature was proposed. Based on the results of experiments, the combustion reaction mechanism was briefly analyzed. The burning rate, flame temperature and thermal sensitivity of B 4 C/KNO 3 increase with the decrease of B 4 C particle size. The mass ratio of B 4 C/KNO 3 has a great effect on combustion properties. Oxidizer-rich compositions have low flame temperatures, low burning rates, and provide green light emission. The combustion reactions of fuel-rich compositions are vigorous, and the B 4 C/KNO 3 with mass ratio of 25:75 has the highest burning rate and the highest flame temperature.
