Reactive Materials Synthesis and Aluminothermy Reaction of Aluminum/Cobalt-Leadoxide

Abstract:

Alumimum/cobalt nanocomposite was fabricated by displacement method, wherein NH₄F and gelatin played significant roles in deposition of Co nanoparticles. The as-prepared Al/Co was etched by strong acid and alkali respectively. In acid solution, micron structure of the residue presents hollow Co shells, whereas the product separated from alkali shows fragments made up with metal Co. Analyzing the distinguishable results, possible mechanisms of etching in acid and alkali were inferred. Thermal analysis indicated that the reactivity of Al/Co_nano was great higher than Al/Co_submicron and raw Al. The ΔH_r and Q_max of Al/Co_nano-PbO increased by 493.2 J·g^-1 and by 13.65W·g^-1 over Al/Co_submicron-PbO, as well as roughly by 520.6 J·g^-1 and by 16 W·g^-1 over raw Al-PbO system.

• Periodical: Applied Mechanics and Materials (Volume 320)
• Pages: 383-388
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.320.383
• Online since: May 2013
• Authors: Yi Wang, Chun Yang, Xiao Lan Song, Wei Jiang, Guo Dong Deng, Feng Sheng Li
• Keywords: Al Based Nanocomposites, Leadoxide, Nanocobalt, Reactive Materials, Thermite

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