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Studies in the Area of Pyrotechnics Reported from New Jersey Institute of Technology (Ignition of Nanocomposite Thermites by Electric Spark and Shock...

July 22, 2014



Studies in the Area of Pyrotechnics Reported from New Jersey Institute of Technology (Ignition of Nanocomposite Thermites by Electric Spark and Shock Wave)

By a News Reporter-Staff News Editor at Journal of Technology -- Fresh data on Pyrotechnics are presented in a new report. According to news reporting originating in Newark, New Jersey, by VerticalNews journalists, research stated, "Nanocomposite 8Al center dot MoO3 thermite particles were prepared using arrested reactive milling and ignited using two experimental techniques. In spark ignition, a monolayer of powder was placed on a conductive substrate and heated in air by a pulsed electrostatic discharge."

The news reporters obtained a quote from the research from the New Jersey Institute of Technology, "In shock ignition, an individual particle was targeted by a miniature, laser-driven flyer plate accelerated to a speed in the range of 0.5-2 kms(-1). In both experiments, time-dependent optical emission produced by the ignited material was monitored and recorded. The heating rates achieved in the present experiments are on the order of 10(9-)-10(11) Ks(-1). These ignition methods result in a very fast combustion with characteristic burn times reduced by 1-3 orders of magnitude compared to the burn times measured previ-ously for the same material ignited in the CO2 laser beam, where it was heated at a much lower rate of about 10(6-)-107Ks(-1). Ignition delays observed in both shock and spark ignition experiments are close to each other and vary in the range of 120-200 ns. The times of characteristic rapid increase in the optical emission of the ignited particles are also close to each other for the two experiments; however, these times are somewhat shorter (less than one mu s) for the spark ignition tests compared to few mu s observed for the shock initiated particles. Preliminary ideas enabling one to interpret the present results are discussed."

According to the news reporters, the research concluded: "This work establishes an approach for systematic studies of high rate ignition and respective combustion of nanocomposite reactive materials."

For more information on this research see: Ignition of Nanocomposite Thermites by Electric Spark and Shock Wave. Propellants Explosives Pyrotechnics, 2014;39(3):444-453. Propellants Explosives Pyrotechnics can be contacted at: Wiley-V C H Verlag Gmbh, Boschstrasse 12, D-69469 Weinheim, Germany.

Our news correspondents report that additional information may be obtained by contacting W.L. Shaw, New Jersey Inst Technol, Newark, NJ 07102, United States. Additional authors for this research include D.D. Dlott, R.A. Williams and E.L. Dreizin.

Keywords for this news article include: Newark, New Jersey, Pyrotechnics, United States, North and Central America

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Journal of Technology


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