Influence of Silicon Nitride Content on Explosive Performance of Bulk Emulsion Explosive

Silicon nitride, with high nitrogen content, was added to improve the explosive performance of bulk emulsion explosive. Air blast experiments, detonation velocity tests, and lead column compression experiments were conducted to assess the impact of silicon nitride content on the air shock wave parameters, detonation velocity, and Brisance of bulk emulsion explosive. The results showed that as the silicon nitride content increased from 0 % to 1.2 %, the density of the explosive increased from 1.02 g·cm-3 to 1.11 g·cm-3. The air shock wave pressure peak increased from 0.1156 MPa to 0.2977 MPa, then decreased to 0.2408 MPa, with the maximum peak being 1.57 times the minimum peak. The specific impulse increased from 9.22 Pa·s to 23.00 Pa·s, then decreased to 19.59 Pa·s, with the maximum specific impulse being 1.49 times the minimum. The detonation velocity decreased from 3867.45 m·s-1 to 3265.66 m·s-1, then increased to 4830.60 m·s-1, before decreasing again to 4541.51 m·s-1, with the maximum detonation velocity being 1.47 times the minimum. The Brisance increased from 13.86 mm to 19.40 mm, then decreased to 17.18 mm, with the maximum Brisance being 1.40 times the minimum. The experimental results indicated that silicon nitride can enhance its explosive performance, providing valuable insights for the formulation and optimization of f bulk emulsion explosives.