Abstract: In order to study effects of several kinds of composite catalysts on the combustion behavior of PDADN-RDX-CMDB propellant,different means such as thermogravimetric loss,microthermo couple,burning-rate experiment and SEM of quenched sample surface were adopted.The results show that two kinds of composite catalysts,which are ΦPb-βCu-CB and βPbCu-CB,can obviously improve the combustion behavior of PDADN-RDX-CMDB propellant,combustion pressure exponent are decreased and burning-rate are increased.The “bubble-condensation reaction” theory are proposed to explain “super rate combustion” phenomenon of PDADN-RDX-CMDB with composite catalysts propellant.

Key words: Nitramine propellant;Modified double base propellant;Combustion catalyst;Catalysis mechanism

摘要： 采用热分析、微热电偶技术、燃速测试、熄火表面的扫描电镜观测等实验方法 ,研究了不同类型的复合催化剂对PDADN RDX CMDB推进剂燃烧特性的影响。结果发现 ,邻苯二甲酸铅 /雷索辛酸铜 /炭黑与雷索辛酸铅铜 /炭黑两类复合催化剂可较好地改善PDADN RDX CMDB推进剂的燃烧特性 ,明显降低其压强指数且同时提高燃速 ,基于实验现象的观测结果分析 ,提出了“气泡 凝聚相反应”理论 ,解释了该类推进剂在中低压区发生的“超速燃烧”现象。

关键词: 硝胺推进剂;改性双基推进剂;燃烧催化剂;催化机理