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为了研究纳米非晶合金CoB颗粒对推进剂热分解的影响。采用KBH4还原法在乙二醇溶剂制备了分散均匀的、粒径约为5nm左右的CoB合金粉,并与在水溶剂中制备得到的CoB纳米粉进行了比较,采用XRD、TEM、SAED对其晶相和形貌进行了分析。另外,采用DSC研究了纳米CoB合金粉对AP热分解的催化性能,利用靶线法研究其对AP基固体推进剂的燃烧性能的影响。结果表明:分散均匀的纳米CoB合金粉对AP的热分解有很好的催化活性,同时对AP基固体推进剂的燃烧性能也有较强的影响。2%(质量分数)的CoB粉,可使AP的分解峰峰温提前113.3℃,表观分解热增加0.660kJ/g;并能使改性推进剂的燃速大幅提高,压力指数从0.57降低到0.46(5～11MPa)。
In order to study the impact of nano-amorphous alloy CoB particles on the thermal decomposition of propellants. CoB alloy powders with uniform size and particle size of about 5 nm were prepared by KBH4 reduction method in ethylene glycol solvent and compared with CoB nano-powders prepared in water solvent. XRD, TEM and SAED Crystal phase and morphology were analyzed. In addition, the catalytic performance of nano-CoB alloy powder for thermal decomposition of AP was studied by DSC, and the influence of the CoB alloy powder on the combustion performance of AP-based solid propellants was studied by the target line method. The results show that nano-CoB powder with good dispersion has a good catalytic activity for thermal decomposition of AP, and also has a strong influence on the combustion performance of AP-based solid propellants. 2% (mass fraction) of CoB powder can make AP peak decomposition temperature advanced 113.3 ℃, apparent heat of decomposition 0.660kJ / g; and can make the modified propellant burning rate increased significantly, the pressure index decreased from 0.57 To 0.46 (5 ~ 11MPa).