jp5b03317_si_001.pdf (230.16 kB)
New Method for Extracting Diffusion-Controlled Kinetics from Differential Scanning Calorimetry: Application to Energetic Nanostructures
journal contribution
posted on 2015-06-25, 00:00 authored by Shijing Lu, Edward J. Mily, Douglas L. Irving, Jon-Paul Maria, Donald W. BrennerA new expression is derived for interpreting
differential scanning
calorimetry curves for solid-state reactions with diffusion-controlled
kinetics. The new form yields an analytic expression for temperature
at the maximum peak height that is similar to a Kissinger analysis,
but that explicitly accounts for laminar, cylindrical, and spherical
multilayer system geometries. This expression was used to analyze
two reactive multilayer nanolaminate systems, a Zr/CuO thermite and
an Ni/Al aluminide, that include systematically varied layer thicknesses.
This new analysis scales differential scanning calorimetry (DSC) peak
temperatures against sample geometry, which leads to geometry-independent
inherent activation energies and prefactors. For the Zr/CuO system,
the DSC data scale with the square of the bilayer thickness, while,
for the Ni/Al system, the DSC data scale with the thickness. This
suggests distinct reaction mechanisms between these systems.
History
Usage metrics
Categories
Keywords
layer thicknessessample geometryscanning calorimetryEnergetic NanostructuresApeak temperaturesNiDSC data scalescanning calorimetry curvesDifferential Scanning Calorimetrypeak heightnanolaminate systemsKissinger analysisactivation energiesNew Methodbilayer thicknessanalysis scalesform yieldssystem geometriesreaction mechanismsexpressionZr
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC