Effect of Modified Allotropic Forms of Carbon on the Burning Rate of Model Compositions of Paste-Like Fuels
S. Yu. Naryzhnyi, V. Yu. Dolmatov, A. S. Kozlov, V. V. Fomenko, G. V. Semashkin, V. A. Marchukov, S. V. Desyatov, M. D. Klimov
SKTB Tekhnolog, Saint Petersburg, Russia
Keywords: paste-like propellant, detonation nanodiamond, multiwalled carbon nanotube, soot, activated carbon, graphite, adamantane, graphene, burning rate, specific impulse
Abstract
Effect of carbon additives on burning rate of model composite propellants is studied. Paste-like propellant compositions are used, which are an analog of composite solid fuel with an uncured binder. The role of nanocarbon additives is played by different substances: detonation nanodiamond (DND), which is sometimes heat-treated or crushed to a size of 4 nm, multilayer carbon nanotubes, soot, activated carbon, graphite, adamantane, and graphene. Among all the allotropic forms of carbon, the maximum increment of the burning rate (23%) is ensured by an additive of 2% DND with 2% plasticizer (by weight). At the same time, the combustion product temperature decreases by ≈200 °C, thereby reducing the probability of rocket engine burnout.
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