Results 41 to 50 of about 581 (155)

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

Burning structures and propagation mechanisms of nanothermites

Proceedings of the Combustion Institute, 2023
Nanothermites demonstrate attractive combustion characteristics such as tunable reactivity and high energy density. There is however a lack of fundamental understanding on their burning structures and reaction mechanisms due to the multi-scale complexity associated with the material and reaction heterogeneities.
Suyong Kim, Averitt A. Johns, John Z. Wen, Sili Deng   +3 more
openaire   +1 more source

Controlled Substrate Destruction Using Nanothermite

Propellants, Explosives, Pyrotechnics, 2017
The experiments described in this paper look to further transient electronic device development by exploring the fracturing capabilities of aluminum copper (II) oxide and aluminum bismuth (III) oxide nanothermites. In particular, a quick, inexpensive test was developed that was able to characterize the substrate fracturing capability of these ...
Trevor J. Fleck, Raghav Ramachandran, Allison K. Murray, Whitney A. Novotny, George T.‐C. Chiu, I. Emre Gunduz, Steven F. Son, Jeffrey F. Rhoads   +7 more
openaire   +2 more sources

Couplages multi-physique et multi-échelle pour la modélisation prédictive de la combustion de matériaux énergétiques intégrés dans leur environnement [PDF]

, 2021
Cette thèse présente le développement et l'exploitation d'un modèle qui simule à la fois l'initiation et la réaction complète de propagation de nanothermites à base de poudre avec la seule prise en compte de mécanismes en phase condensée. Trois objectifs
Brotman, Sarah
core  

EU Regulation of Nanobiocides: Challenges in Implementing the Biocidal Product Regulation (BPR) [PDF]

, 2016
The Biocidal Products Regulation (BPR) contains several provisions for nanomaterials (NMs) and is the first regulation in the European Union to require specific testing and risk assessment for the NM form of a biocidal substance as a part of the ...
Baun, Anders, Brinch, Anna, Hansen, Steffen Foss, Hartmann, Nanna B.   +3 more
core   +2 more sources

Charge‐Dipole Acceleration of Polar Gas Molecules towards Charged Nanoparticles: Involvement in Powerful Charge‐Induced Catalysis of Heterophase Chemical Reactions and Ball Lightning Phenomenon

Journal of Nanomaterials, Volume 2010, Issue 1, 2010., 2010
In humid air, the substantial charge‐dipole attraction and electrostatic acceleration of surrounding water vapour molecules towards charged combustible nanoparticles cause intense electrostatic hydration and preferential oxidation of these nanoparticles by electrostatically accelerated polar water vapour molecules rather than nonaccelerated nonpolar ...
Oleg Meshcheryakov, Donglu Shi
wiley   +1 more source

Thermal behavior and combustion performance of Al/MoO3 nanothermites with addition of poly (vinylidene fluorine) using electrospraying

Materials Research Express, 2020
To investigate the effect of the addition of poly (vinylidene fluoride) (PVDF) on nanothermites, Al/MoO _3 /PVDF energetic nanocomposites were prepared using electrospraying method. As a control group, Al/MoO _3 was also designed. Then, both samples were
Jialin Chen, Tao Guo, Miao Yao, Jiaxing Song, Wen Ding, Yiming Mao, Shi Li, Rui Zhu   +7 more
doaj   +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

Fluctuating Flame from Suspending Ferrimagnetic Core/Shell Al@Fe3O4 Nanoparticles in a Magnetic Field

Advanced Materials Interfaces, Volume 11, Issue 29, October 15, 2024.
This article reports on the fabrication and microstructures of novel Al@Fe3O4 core–shell composite nanoparticles. Thermal analysis suggests the as‐prepared particles predominantly go through a solid‐state reaction mechanism that exhibits 30% lower activation energy compared to physically mixed nanocomposite.
Shina Maini, Anqi Wang, John Z. Wen
wiley   +1 more source

Microwave Ignition of Thermites

Propellants, Explosives, Pyrotechnics, Volume 49, Issue 10-11, October 2024.
Abstract This study investigates the microwave ignition behavior of a range of thermites of aluminum, boron, titanium, and tantalum fuels with oxides of Bi2O3, CuO, and Fe2O3. In order to gain insight into the modes of energy transfer leading to ignition, thermites are heated in either a purely electric or magnetic field environment within a single ...
Justin Lajoie, Brock Jones, Adam Lawrence, Stuart Barkley, Travis Sippel   +4 more
wiley   +1 more source