Results 51 to 60 of about 1,071 (193)

A Melting‐Point Energy Window for Defect‐Induced Energy Release in Copper Nanoparticles

physica status solidi (a), Volume 223, Issue 7, 7 April 2026.
Point defects significantly modify the energetic landscape of copper nanoparticles during melting. Atomistic simulations reveal a distinct melting‐point energy window, where defect‐induced extra stored energy is sharply amplified and released. The results elucidate how defect concentration and particle size govern premelting instability, structural ...
Hyo Jung Choi, Sung Yeob Jeong, Bo Sung Shin   +2 more
wiley   +1 more source

Cobalt‐Based Metal Hybrid Encapsulated Micro‐Aluminum for Tailoring Combustion in Composite Solid Propellants

Rare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT To address the issues of aluminum (Al) powder agglomeration during combustion and low oxidizer decomposition efficiency in composite solid propellants, this study utilized in situ self‐assembly technology to prepare cobalt‐based hybrid‐coated modified Al powder (Al@CZ).
Chong Chen, Chen Peng, Lin Fu, Fan Cui, Wenqi Zhu, Yichen Li, Lei Xiao, Jun Di, Guigao Liu, Wei Jiang, Hongfeng Ji, Gazi Hao   +11 more
wiley   +1 more source

Fundamentals and Advances in Aluminum/Polytetrafluoroethylene Reactive Materials: Design, Ignition, and Response Behaviors

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
Metal‐based energetic materials are advancing the transformation of conventional energetic technologies toward intelligent systems, driven by controllable energy release and robustness under extreme environments. This paper focuses on the aluminum/polytetrafluoroethylene (Al/PTFE) composite and systematically reviews the research progress and ...
Tianyi Wang, Yuan He, Zhenwei Zhang, Yansong Yang, Chuanting Wang, Lei Guo, Yong He, Chaofan Sun   +7 more
wiley   +1 more source

Transfer of Self‐Sustained Reactions between Thermally Coupled Reactive Material Elements

Advanced Engineering Materials, Volume 27, Issue 3, February 2025.
The analysis reveals how localized reactive multilayer materials, under gasless combustion, influence heat transfer and reaction kinetics. Factors like thermal conductivity, substrate properties, and obstacle composition are crucial. This understanding aids in optimizing engineering processes.
Deepshikha Shekhawat, Manuela Breiter, Joachim Döll, Farshad Daneshpazhooneja, Anne Jung, Jörg Pezoldt   +5 more
wiley   +1 more source

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

Formation of Additive-Containing Nanothermites and Modifications to their Friction Sensitivity

, 2017
Nanothermites can provide high energy densities and reaction rates but can also display extreme friction sensitivities. Additives that provide friction modification offer the potential to reduce the friction sensitivity of nanothermites.
David G. Kelly (2831402), Pascal Beland (2831396), Patrick Brousseau (2831399), Catalin-Florin Petre (2831405)   +3 more
core   +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

Ignition of nanothermites by a laser diode pulse

, 2021
Experimental investigation has been carried out for laser ignition and combustion of nanothermites based on aluminum and oxides of copper, bismuth and molybdenum. Ultrasonic mixing of nanosized powders was used to produce compositions.
A. Dolgoborodov, V. Kirilenko, M. Brazhnikov, L. Grishin, M. L. Kuskov, G. Valyano   +5 more
semanticscholar   +1 more source

Fast circuit breaker based on integration of Al/CuO nanothermites

, 2018
International audiencePyroswitches and circuit breakers play an important safety role in electrical systems. A miniature one-shot circuit breaker based on the violent reaction of a nanothermite is presented for safety application as protection against ...
Ludovic Salvagnac, Rossi, Carole, Estève, Alain, Alain Estève, Baijot, Vincent, Nicollet, Andréa, Vincent Baijot, Carole Rossi, Andréa Nicollet, Salvagnac, Ludovic   +9 more
core   +1 more source

Low-Temperature Exothermic Reactions in Al/CuO Nanothermites Producing Copper Nanodots and Accelerating Combustion

ACS Applied Nano Materials, 2021
Several Al/CuO nanocomposite reactive materials, prepared recently by arrested reactive milling, were found to exhibit a distinct low-temperature exothermic peak around 600 K seen by differential s...
Mehnaz Mursalat, Ci Huang, Baptiste Julien, M. Schoenitz, A. Estève, C. Rossi, E. Dreizin   +6 more
semanticscholar   +1 more source