储氢合金对GAP基高能固体推进剂性能的影响

Influence of hydrogen storage alloy on performance of GAP-based high energy solid propellant

在聚叠氮缩水甘油醚(GAP)基固体推进剂体系中,采用储氢合金取代不同含量的微米级铝粉,获得无孔的高能固体推进剂。采用扫描电镜表征了含储氢合金的GAP基固体推进剂的微观形貌,采用药块分别测试了推进剂的安全、力学、静态燃烧性能和爆热,并采用BSFΦ75发动机测试了动态燃烧性能。结果表明,含储氢合金药块的密度比原配方的密度略低,内部结合更紧密。一定含量的储氢合金不影响原配方的安全性能和力学性能,可提高原配方的动、静态燃速。随着储氢合金质量分数从9%增加至18%(全部取代微米级铝粉),推进剂的静态燃速无明显变化。

The non-porous high energy solid propellants were obtained by replacing different content of micron grade aluminum powder with the hydrogen storage alloy in the glycidyl azido polyether （GAP）-based solid propellant systems. The microscopic morphology of GAP-based solid propellant containing hydrogen storage alloy was characterized by using scanning electron microscope. The safety performance, mechanical performance, static combustion performance and detonation heat of the propellant were tested respectively by using the propellant block.The dynamic combustion performance was tested by using BbFФ75 motor, lne results snow that the density of the propellant block containing certain amount hydrogen storage alloy is slightly less than that of the original formulation, its inner bonding is more close. A certain amount of hydrogen storage alloys do not affect safety performance and mechanical performance of the original formulation, and can increase the dynamic and static burning rates of the original formulation. The static burning rate of the propellant has no significant change with the mass fraction of the hydrogen storage alloy increasing from 9% to 18% （completely replacing micron grade aluminum powder）.