Suppressing H2 evolution by silicon powder dispersions

Show simple item record Tichapondwa, Shepherd Masimba Focke, Walter Wilhelm Del Fabbro, Olinto Mkhize, Sfiso S. Muller, E. 2012-05-25T08:01:22Z 2012-05-25T08:01:22Z 2011-07
dc.description.abstract Silicon dispersions in water are used to produce pyrotechnic time delay compositions. The propensity of the silicon to react with water and to produce hazardous hydrogen gas must be suppressed. To this end, the effect of surface modifications and medium pH on the rate of corrosion of silicon was studied at ambient temperature. It was found that the rate of hydrogen evolution increased with increasing pH. Silanes proved to be more effective silicon corrosion inhibitors than alcohols, with vinyl tris (2-methoxyethoxy) silane producing the best results. Differential thermal analysis (DTA) studies were performed using a near-stoichiometric amount of lead chromate as oxidant. Comparable combustion behavior was observed when both the fuel and the oxidant powders were either uncoated or silane modified. Mixtures of neat oxidant with silane-coated silicon showed poor burn behavior and this was attributed to poor particle–particle mixing due to the mismatch in surface energies. en_US
dc.description.librarian ai2012 en
dc.description.sponsorship The THRIP programme of the Department of Trade and Industry and the National Research Foundation as well as AEL en_US
dc.description.uri en_US
dc.identifier.citation Tichapondwa, SM, Focke, WW, Del Fabbro, O, Mkhize, S & Muller, E 2011, 'Suppressing H2 evolution by silicon powder dispersions', Journal of Energetic Materials, vol 29, no. 4, pp. 326-343. en_US
dc.identifier.issn 0737-0652 (print)
dc.identifier.issn 1545-8822 (online)
dc.identifier.other 10.1080/07370652.2010.529100
dc.language.iso en en_US
dc.publisher Taylor & Francis en_US
dc.rights © Taylor & Francis Group, LLC. This is an electronic version of an article published in Journal of Energetic Materials, vol. 29, no. 4, pp. 326-343, July 2011. Journal of Energetic Materials is available online at: en_US
dc.subject Oxidation en_US
dc.subject Silicon en_US
dc.subject.lcsh Silicon -- Oxidation en
dc.subject.lcsh Hydrogen en
dc.subject.lcsh Oxidizing agents en
dc.title Suppressing H2 evolution by silicon powder dispersions en_US
dc.type Postprint Article en_US

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