Nanoscale Investigation of surfaces exposed to a thermite spray

Charles Crane, Eric Collins, Michelle Pantoya, Brandon Weeks

Research output: Contribution to journalArticle

Abstract

A thermite spray gun was recently developed as a means for discharging the reaction products and intermediates of the highly exothermic thermite reaction. The thermite spray gun was inspired by more widely used hydrocarbon spray guns with the modification that the reactants are in the solid phase. This device has been used in conjunction with a heat flux sensor to examine the energy transfer characteristics of the spray. The current study extends this work by examining the influence of reactant composition on heat flux characteristics as well as the penetration behavior of the ejected spray evaluated with atomic force microscopy (AFM). Specifically, the apparatus was loaded with a fuel lean ( = 0.61) and a fuel rich ( = 1.52) Al-Fe2O3 thermite and both nanometric and micron scale reactants were investigated. The fuel rich mixture was predicted to generate 17% more gaseous products than the fuel lean while both have the same theoretical adiabatic flame temperature. The gas generating
Original languageEnglish
Pages (from-to)1286-1292
JournalApplied Thermal Engineering
StatePublished - 2011

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