Page - 171 - in Advanced Chemical Kinetics

methods.For carbides, theTi/Csystemhasbeenstudied [13–15],withadditional studies in the Ta/C[14,16]andSi/C[14,17]mixtures.TheTi/Bsystemwasalsoinvestigated[18].Themajority of ETEwork being focused on theNi/Al system [12, 19–21]. The Ti/Fe2O3 system is the only thermite system investigatedbyETE [22]. In addition to the experimental studies, anumberof theoreticalmodelshavebeendeveloped tobetterunderstand theETEprocess [23–26].Figure1 shows that ranges of reported activation energies for the above mentioned gasless systems, includingboth intermetallics and thermitesobtainedbyETE. It canbe seen that the results are reproducible, confirming the reliabilityof theETEapproach.Additionally, the techniqueallows foramorecompleteunderstandingofsystemsthathavemultiplesteps that rapidlyoccur inthe high-temperature regime,whichgives insight into thecombustionprocess [2]. 4.Differential thermalanalysis/differential scanningcalorimetry This techniquehasbeenextensivelyused inmanyfields, including:polymerscience,biochem- istry, andmaterials science. Inorder toutilize thesemethods, a sample isheatedat a constant rate until the maximum set temperature is reached. Throughout the experiment, the heat release characteristics of the sample are measured against an inert reference standard. Figure1. Summaryofdatacollectedusing theelectrothermalexplosion technique. Kinetics of Heterogeneous Self-Propagating High-Temperature Reactions http://dx.doi.org/10.5772/intechopen.70560 171