Nanomaterials for heterogeneous combustion
Nanomaterials for heterogeneous combustion
复制标题
DOI：
10.1002/prep.200400025
复制
发表时间：
2004-02-01
影响因子：
1.8
通讯作者：
Schoonman, J
中科院分区：
文献类型：
--
作者：
Pivkina, A;Ulyanova, P;Schoonman, J
纳米材料和纳米复合材料由于其独特的力学、电学、光学、磁学和能量学性能，近年来引起了人们的广泛兴趣，其特征是超细晶粒(小于100 nm)。研究表明，纳米材料的热行为与微米级的粉末有很大的不同。纳米金属和炸药粉末已被用作固体推进剂和炸药混合物，以提高效率。与此同时，最近的研究表明，推进剂中存在纳米金属并不一定会提高燃速和燃烧温度。造成这种效果的原因还远不清楚。本文提出了一种利用真空共沉积技术制备含能材料--亚硝酸铵、环三亚甲基三硝胺(RDX)和铝的纳米复合材料的新方法。研究了合成的纳米粉末和纳米复合材料的热行为。与微米级材料相比，RDX纳米粉末的燃速有很大的不同。实验结果可以用来研究纳米材料对燃烧特性的影响。
Nanophase materials and nanocomposites, characterized by an ultra fine grain size (less than 100 nm) have attracted wide spread interest in recent years by virtue of their unusual mechanical, electrical, optical, magnetic, and energetic properties. Studies have shown that the thermal behavior of nano-scaled materials is quite different from micron-sized powders. Nanosized metallic and explosive powders have been used as solid propellant and explosive mixtures to increase efficiency. At the same time recent studies reveal that the presence of nanosized metals in propellants does not necessary translate into an increased burning rate and burning temperature. The reasons of this effect are far from being clear. This paper presents a new approach to the production of nanocomposites of some energetic materials-ammonium nitrite, cyclotrimethylene trinitramine (RDX), and aluminum-by the vacuum co-deposition technique. The thermal behavior of the synthesized nanopowder and nanocomposites is investigated. A substantial difference in burning rate of RDX nanopowder has been found in comparison to micron-sized material. Experimental results allow investigating the effects of nanosized materials on the combustion characteristics.