Results 41 to 50 of about 1,710 (208)

Microstructural Analysis of Thermite Welds

, 2010
Thermite welding is a simple and cost-effective process widely used in the field for rail repair and joining. Despite the well-accepted use of this technology, there is a major concern regarding the soundness of the weldments which are often found to be ...
C. Isaac Garcia, Daniel Gutscher, Semih Kalay, Konstantin V. Redkin, Anthony J. DeArdo   +4 more
core   +2 more sources

Architecting nano‐Al/HMX/CuO energetic micro‐units unlocks superior interface and highly efficient combustion

InfoMat, EarlyView.
Improving the dispersion of nano‐aluminum is of great importance in explosives and propellants. The spherical Al/HMX/CuO energetic micro‐units were prepared using microchannel technology, which significantly improved the uniformity and dispersion of nano‐Al. It also enhanced the mass and heat transfer efficiency between the fuel and oxidizer components,
Gazi Hao, Tianxu Xi, Yong Kou, Cheng Zhang, Ronghuan Yang, Jiahao Yu, Qiangqiang Lu, Hongyu Yang, Chong Chen, Lei Xiao, Jun Di, Fengqi Zhao, Wei Jiang   +12 more
wiley   +1 more source

Synthesis and oxidation chemistry of highly energetic boron/aluminum/magnesium composites

FirePhysChem, 2023
The limited use of boron (B) in energetic applications is due to the presence of a native oxide layer on its surface, which acts as a thermodynamic barrier and adds to the dead weight that does not contribute to the oxidation energy release.
Prawal P.K. Agarwal, Themis Matsoukas
doaj   +1 more source

Optimizing Ball‐Milled Composites for Fast Energy Release Under Shock Compression

Propellants, Explosives, Pyrotechnics, EarlyView.
ABSTRACT Microparticle additives containing both Al fuel and oxidizer, fabricated by arrested reactive milling (ARM), could potentially increase the power of energetic materials such as HMX because they contain premixed fuel and oxidizer. Optimizing shock reactivity requires exploring a vast parametric space encompassing composition, milling parameters
Siva Kumar Valluri, Edward L. Dreizin, Dana D. Dlott   +2 more
wiley   +1 more source

Thermite welding of Cu–Nb microcomposite wires

, 2017
Thermite welding of Cu–Nb microcomposite wires was investigated. Suitable compositions of thermite material and slag were determined from the equation of the exothermic combustion synthesis reaction.
Olegas Černašėjus, Jelena Škamat, Raimonda Lukauskaitė, Nikolaj Višniakov, Renata Boris, Vitalijus Rudzinskas, Gediminas Mikalauskas   +6 more
core   +1 more source

Comparative investigations of ternary thermite Al/Fe2O3/CuO and Al/Fe2O3/Bi2O3 from pyrolytic, kinetics and combustion behaviors

Defence Technology, 2023
To develop new energy enhancement energetic materials with great combustion performance and thermal stability, two kinds of ternary thermite, Al/Fe2O3/CuO and Al/Fe2O3/Bi2O3, were prepared and analyzed via mechanical ball milling.
Shi Li, Jia-lin Chen, Tao Guo, Wen Ding, Lin Jiang, Miao Yao, Jia-xing Song, Li-feng Xie, Yi-ming Mao   +8 more
doaj   +1 more source

Progress in Explosion Mechanisms and Prevention Technologies for Direct Chill Casting Aluminum Melt Upon Water Contact: A Review

Safety Science and Technology, EarlyView.
Molten aluminum–water explosion triggered by leakage remains the core unresolved safety hazard hindering safe production in aluminum direct chill casting. This review summarizes its explosion mechanism, key influencing factors, prevention technologies, existing gaps, and prospects of intelligent multi‐technology integrated explosion‐proof systems ...
Min Wang, Kang Yang, Jiang Dong, Lidong Xing, Bing Chen, Changke Chen   +5 more
wiley   +1 more source

Thermal Properties and Kinetics of Al/α-MnO2 Nanostructure Thermite

, 2018
In this work, thermal properties and kinetics of Al-nanoparticles/α-MnO2 nanorods thermite were reported. The α-MnO2 nanorods were synthesized using a hydrothermal method and were characterized by X-ray powder diffraction (XRD) and X-ray photoelectron ...
Feng-Li Bei (4868311), Xiang Fang (147347), Jia-Xing Song (4868302), Xiao-Nan Zhang (1797094), Tao Guo (126667), Miao Yao (4868308), Hong-Jun Yu (4868305), Wen Ding (194391)   +7 more
core   +1 more source

Thermite-for-Demise: Preliminary on-Ground Heat Transfer Experimental Testing

, 2023
The use of thermite to assist satellite demise is a novel methodology under exploration in the frame of the CleanSpace Initiative of the European Space Agency.
Finocchi, Piero, Maggi, Filippo, Smet, Geert, Galfetti, Luciano, Murgia, Alessandro, Finazzi, Alessandro, Paravan, Christian, Lips, Tobias, Dossi, Stefano, Bodjona, Kobye   +9 more
core   +1 more source

Study on the Influence of Temperature Distribution in Thermite Plugging Abandoned Well Technology

Energies
With the intensive development of oil and gas resources leading to a rapid increase in abandoned wells, sealing failures may cause oil and gas leakage and environmental pollution.
Hao Liu, Jie Zhang, Ruitao Sun, Xiang Li, Jiajun Yao, Jiazheng Zhou   +5 more
doaj   +1 more source