摘要
采用机械合金化法制备了一种新型铝基复合材料,并用X射线衍射、差示扫描量热和扫描电镜等技术对样品进行了表征,比较了铝基复合材料与铝粉在燃烧热、密度、耗氧量及对HTPB/AP推进剂能量贡献方面的差别,运用差示扫描量热法研究了铝基复合材料对氧化剂AP分解的催化作用。结果表明,铝基复合材料形态规整,其主要组成相为单质Al和MgH2,真密度为2.4763 g/cm3,耗氧量为0.890 8 g(O2)/g,实际燃烧热大于30 000 kJ/kg,燃烧效率达到94%,远高于同粒度的超细铝粉;用铝基复合材料代替丁羟推进剂中的铝粉后,推进剂的理论能量水平大大提高;铝基复合材料对AP的热分解有很好的催化作用。
A new type of Al-based composite was prepared by using mechanical alloying method.The samples were characterized by X-ray diffraction,differential scanning calorimetry and scanning electron microscopy.The differences between Al-based composite and Al were compared in combustion heat,density,oxygen-consuming mass and the contribution to the energy of HTPB/AP propellant.The catalytic performance of the Al-based composite for ammonium perchlorate（AP） decomposition was investigated by differential scanning calorimetry.The results show that the density and oxygen consumption of Al-based composite which is mainly composed of Al and MgH2 are 2.476 3 g/cm3,0.890 8 g（O2）/g respectively.The actual combustion heat was not less than 30 000 kJ/kg,and the combustion efficiency was up to 94%.Al-based composite has good general properties.Replacing Al with Al-based composite in HTPB/AP propellant can increase the energy.Al-based composite has better catalytic activity for the thermal decomposition of AP.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2010年第5期545-548,598,共5页
Journal of Solid Rocket Technology
关键词
铝基复合材料
固体推进剂
铝粉
能量特性
Al-based composite
solid propellant
Al powder
energy characteristics
