镁基储氢材料对AP/Al/HTPB复合固体推进剂性能的影响

Effect of Magnesium Based Hydrogen Storage Materials on the Properties of Composite Solid Propellant

用差示扫描量热仪(DSC)研究了镁基储氢材料(Mg2NiH4,Mg2Cu-H和MgH2)对高氯酸铵(AP)及AP/Al/HTPB复合固体推进剂热分解性能的影响。结果表明,含量5%的镁基储氢材料对AP热分解过程具有明显的催化促进作用。含量1.3%的镁基储氢材料可以降低AP/Al/HTPB复合固体推进剂热分解过程的热分解温度,使分解热明显增加,表现出显著的增强促进作用。燃速测定结果表明,在8MPa下,含量1.3%的Mg2NiH4,Mg2Cu-H和MgH2可以分别使AP/Al/HTPB复合固体推进剂的燃速提高3.5%、14.4%和13.9%。镁基储氢材料对AP和AP/Al/HTPB复合固体推进剂热分解的作用效果与其含氢量有关,MgH2的含氢量大,作用效果好。镁基储氢材料主要通过催化AP/Al/HTPB复合固体推进剂中AP的热分解,表现出对AP/Al/HTPB复合固体推进剂热分解具有较好的催化效果。

The thermal decomposition behaviors of ammonium perchlorate（AP） and AP/Al/HTPB composite solid propellant in the presence of magnesium based hydrogen storage materials（ Mg2NiH4 , Mg2 Cu-H and MgH2 ）were studied by DSC. The results show that 5% magnesium based hydrogen storage materials has obvious catalytic effect on the thermal decomposition of AP, and 1.3% magnesium based hydrogen storage materials obviously decreases the thermal decomposition temperature and increases heat release of AP/Al/HTPB composite propellant. The burning rates of AP/Al/HTPB composite solid propellant （8 MPa） are increased by 3.5% ,14.4% and 13.9% respectively with addition of 1.3% Mg2NiH4, Mg2Cu-H and MgH2. There is a clear relationship between hydrogen content of magnesium based hydrogen storage materials and its effect, and MgH2 shows obvious effect among magnesium based hydrogen storage materials due to its large hydrogen content. By catalyzing the thermal decomposition of AP, magnesium based hydrogen storage materials shows good catalytic effect on thermal decomposition of AP/Al/HTPB composite solid propellant.