为了调节发射药的燃气释放规律,采用溶解法制备了表面微孔结构三基发射药,利用扫描电镜观察了发射药样品的微观结构;通过密闭爆发器试验研究了其静态燃烧性能;用材料试验机及冲击试验测定了其力学性能;以155 mm火炮研究了发射药的内弹道性能.研究结果表明,与原药相比,表面微孔结构三基发射药燃烧压力上升快,常温下燃烧结束时间缩短3.2 ms;初始动态活度值高,燃烧渐增性比原药低;在点火燃烧初始阶段表观燃速变大,后期燃速与原药基本一致;表面微孔结构三基发射药的力学性能有较小幅度的降低,其中,常温下降低幅度最大,抗压强度和抗冲击强度分别降低了2.98 MPa和0.35 kJ·m^-2;减装药炮口初速提高13.9 m·s^-1、全装药炮口初速提高1 5.0m·s^-1,膛压均有不同程度降低.
In order to regulate the combustion gas generation of propellant burning process, the triple base propellant with surface layer micro-porous structure was prepared in water by dissolution method. And its performance were studied and compared with original triple base propellant. The static combustion performance was investigated by closed-bomb test, and the mechanical prop- erties were measured by an universal testing machine and impact testing machine,and the interior ballistic performance was studied by 155 mm gun. Results show that the burning pressure of the sponge-like micro-porous structure propellant rises faster compared with that of originalpropellant, and the burning times shortens by 3.2 ms at normal temperature. The initial dynamic vivacity is high, and the progressive combustion performance of the sponge-like micro-porous structure propellant is lower than those of the original. The burning rate increases in the ignition stage, but is the same as the original propellant in the later period. The com- pressive strength and anti-impact strength of surface micro-porous structure propellant decrease, most at 20℃ by 2.98 MPa and 0.35 kJ·m^-2, respectively. The muzzle velocity of reduced charge increases by 13.9 m·s^-1 and the muzzle velocity of full charge increases by 15. O m·s^-1, and the chamber pressure reduces also.
Chinese Journal of Energetic Materials
triple base propellant
mechanical properties~dynamic vivacity