AP包覆硼对富燃推进剂药浆流变特性的影响

用四种不同量AP包覆的硼粉,对硼含量达30%的富燃推进剂实验配方中的药浆流变特性进行了研究,结果表明:20%AP包覆硼粉的含硼富燃固体推进剂药浆的流变性与另三种硼粉的明显不同———近6h粘度为2 2kPa·s,屈服值在300Pa以下,表明其药浆流平性好并可满足浇铸要求。20%AP包覆硼的合适包覆量、包覆完整的表面性质及近似球型粒子的形状决定了其药浆的流变特性最优。

Effect of boron coated with AP on the rheological properties of slurry of fuel-rich propellant

Four types of boron coated with AP on the rheological properties of the slurry containing 30% boron were investigated. The experimental results revealed that the rheological properties of the slurry of boron coated with 20% AP are obviously different from the others, of which the viscosity is 2.2 kPa·s and the yield value is smaller than 300 Pa after 6 h. This demonstrates that the slurry has a good fluidity and can be casted. The best rheologocal properties were ascribable to the appreciate amount of coating AP, the integrated surface of coated boron and the shape of global particle.