Reactivity of aluminum nanopowders with metal oxides
Reactivity of aluminum nanopowders with metal oxides
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DOI：
10.1016/j.powtec.2005.04.027
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发表时间：
2005-08
影响因子：
5.2
通讯作者：
S. Valliappan;J. Swiatkiewicz;J. Puszynski
中科院分区：
文献类型：
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作者：
S. Valliappan;J. Swiatkiewicz;J. Puszynski
在过去的几年里，纳米粉体的制备及其在民用和军事领域的应用研究取得了重大进展。这种应用的一个例子是纳米级高能材料的开发。本文介绍了近年来在无约束条件下纳米Al与WO 3、MoO 3、CuO和Fe 2 O3等金属氧化物的超快反应的实验研究。表面功能涂层的存在对Al-CuO体系中的燃烧前沿速度有很大影响，表面功能涂层的存在显著改善了纳米反应物的分散和混合，在低浓度下，提高了燃烧前沿速度。对Al-CuO反应体系的动态压力响应的测量表明，点火延迟时间是功能表面涂层的数量和类型的函数。
During the past few years, significant progress has been made in research of the formation of nanopowders and their application in both civilian and military sectors. One example of such an application is the development of nanoscale energetic materials. This paper presents the recent experimental studies of ultra-fast reactions between nanosized aluminum and various metal oxides, including WO3, MoO3, CuO, and Fe2O3under unconfined conditions. Combustion front velocity in Al–CuO system is strongly affected by the presence of surface functional coating, which significantly improves dispersion and mixing of nanoreactants and, in low concentration, increases the combustion front velocity. Measurements of dynamic pressure responses in Al–CuO reacting system have shown that ignition delay time is a function of the amount and type of functional surface coating.