Results 131 to 140 of about 1,071 (193)

Nanothermites: Developments and Future Perspectives

2023
Jamal Chaouki, John Z Wen, Charles Dubois   +2 more
exaly   +2 more sources

Propellants Reactivity Enhancement with Nanothermites

Propellants, Explosives, Pyrotechnics, 2016
AbstractPropellant grains (Vectan A1) were coated with a thin and stable layer (50 μm, 10 wt‐%) of a “green” sulfate‐based nanothermite (Na2SO4/Al). This flash composition was used herein as an internal pyrotechnic lighter to accelerate the ignition and the combustion of the propellant. The combustion of the modified propellant, which was tested in one‐
Berthe, Jean-Edouard, Comet, Marc, Schnell, Fabien, Suma, Yves, Spitzer, Denis   +4 more
openaire   +2 more sources

Nanothermites for space and defence applications

SPIE Proceedings, 2009
Thermites are energetic materials which are made of a metallic oxide mixed with a reducing metal1. The reactivity of classical thermites is moderate but it can be substantially improved when micron-sized particles are replaced by nanoparticles. In this paper, three examples of nanothermites are given in order to illustrate the contribution of these
Marc Comet, Denis Spitzer, Jean-Pierre Moeglin   +2 more
openaire   +1 more source

How Metal Oxides Change the Reaction Characteristics of Nanothermites

The Journal of Physical Chemistry C
C. MacRobbie, An-Qi Wang, John Z. Wen
semanticscholar   +2 more sources

Les nanothermites

2016
L’introduction récente de la dimension « nano » dans le domaine de la pyrotechnie a permis de développer une nouvelle famille de substances hautement réactives : les nanothermites. Celles-ci ont une composition chimique comparable à celle des thermites de granulométrie submillimétrique ou micrométrique, mais possèdent une morphologie ayant un degré d ...
Eric Lafontaine, Marc Comet
openaire   +1 more source

Reactivity of Al/CuO Nanothermite Composites with Fluoropolymers

Combustion Science and Technology, 2020
Aluminum/copper oxide (Al/CuO) nanothermite is a promising metal fuel due to its high combustion enthalpy and excellent gas-producing characteristics.
Hongqi Nie, Sreekumar Pisharath, Huey Hoon Hng   +2 more
openaire   +3 more sources

Aluminum Hydride as a Fuel Supplement to Nanothermites

Journal of Propulsion and Power, 2014
PressurizationratesincreasebyafactorofabouttwowiththeadditionofAlH3,whereasburntubevelocitiesincrease by about 25%. The enhancement in pressurization rate appears to primarily be a result of the increased pressure associated with the AlH3 decomposition in the nanocomposite thermite system and an enhancement in convective heat transfer.
G. Young, K. Sullivan, N. Piekiel, M. R. Zachariah   +3 more
openaire   +1 more source

Carbon Fibers Enhance the Propagation of High Loading Nanothermites: In Situ Observation of Microscopic Combustion.

ACS Applied Materials and Interfaces, 2021
A major challenge in formulating and manufacturing energetic materials lies in the balance between total energy density, energy release rate, and mechanical integrity.
Haiyang Wang, D. Kline, Miles C. Rehwoldt, M. Zachariah   +3 more
semanticscholar   +1 more source

Nanothermite foams: From nanopowder to object

Chemical Engineering Journal, 2017
Abstract Nanothermites are combustible mixtures made up of a metallic oxide and a reducing metal. The high combustion velocities of nanothermite loose powders (0.1–2.5 km/s) arise from the propagation of heat through their porosity by the advection of hot gases and particles.
Comet, Marc, Martin, Cedric, Schnell, Fabien, Spitzer, Denis   +3 more
openaire   +1 more source

Nanothermite composites with a novel cast curable fluoropolymer

Chemical Engineering Journal, 2021
Abstract Structural nanoenergetic (SNE) composites consisting of nanothermites dispersed in a polymer binder are attractive for combustion applications due to their substantially higher volumetric energy, density, and tailorable energy release characteristics.
Nie, Hongqi, Tan, Li Ping, Pisharath, Sreekumar, Hng, Huey Hoon   +3 more
openaire   +2 more sources