Influence of metal additives on the combustion characteristics and cutting performance of fluoropolymer-based energetic materials

Abstract To study the influence of metal additives on the combustion characteristics and cutting performance of fluoropolymer-based energetic materials, this paper prepared fluoropolymer-based energetic materials containing W (APFW) and Ti (APFT) by a double ball milling method. Self-propagating combustion experiments and steel plate cutting experiments were conducted to investigate the effects of Ti and W additions on the combustion characteristics and cutting performance of energetic materials. The results show that the combustion velocities of APFW and APFT at the bulk density are 36.05 cm/s and 16.01 cm/s, respectively. When their densities are reduced to 60% of the theoretical maximum density, the combustion velocities of APFW and APFT are 4.06 cm/s and 2.61 cm/s, respectively. In terms of cutting performance, the front concave pit area of APFW is 3.74 cm 2 , which is 50.8% higher than that of APFT. The concave pit volume of APFW is 0.89 cm 3 , which is 102.2% higher than that of APFT. When the powder density is 60% of the theoretical maximum density, the entire combustion process is relatively stable, effectively reducing the ignition stage and dissipation stage time and prolonging the stable combustion time. Moreover, the filling of high-density and high-hardness metal W makes APFW have a higher density and better cutting performance. Under the total charge of 60 g, it can cut through a target plate with a thickness of 5.5 mm.