高能固体推进剂药浆流动性的研究

采用测定浓悬浮体系稳态粘度的方法,研究了固体氧化剂HMX粒度级配和金属燃烧剂铝粉球形化对高能固体推进剂药浆流动性的影响,在固体含量为73％～75％的配方中,保持AP,Al含量及粒度分布不变,随着粗/细HMX比例的增加,体系的表观粘度下降,药浆流动性改善,在保持HMX和AP含量及粒度分布不变的情况下,用球形铝粉代替粒状铝粉,同样起到降低药浆表观粘度的作用,且中位径d_(50)越小越明显.同时观察到加入的燃速催化剂具有催化固化反应进行,使推进剂药浆的表观粘度不断增加的作用.进一步证实所加入的燃速催化剂与固化催化剂之间具有交互作用。

A Study of the Flow Behavior of Solid High Energy Propellant Slurry

This paper describes the effect of the particle combination of solid oxidizer HMX and the spheriodization of metal fuel Al powder on the flow behavior of the solid high energy propellant slurries by the static measurement of concentrated suspensions. In compositions of 73% ~ 75% solid loadings the apparent viscosity of the suspension decreases with increasing a ratio of coarse HMX to fine in the case of the content and the particle distribution of Al and AP keeping constant. At the same time, the substitution of spheriodal Al powder for laminar ones results in decreasing the apparent viscosity of the propellant slury with the content and the particle distribution of HMX and AP unchanging. The smaller the medium diameter of the spheriodal Al powder used in this study, the more satisfactory the improvement on the flow behavior. Also observed is that the burning rate catalysts interfere with the curing reaction of the binders so as to increase gradually the apparent viscosity of the propellant slurry. It has been further demonstreated that there is a interaction effect between the burning rate catalysts and curing catalysts.