New method for extracting diffusion-controlled kinetics from differential scanning calorimetry: Application to energetic nanostructures

Shijing Lu, Edward J. Mily, Douglas L. Irving, Jon-Paul Maria, Donald W. Brenner

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

A 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.

Original languageEnglish (US)
Pages (from-to)14411-14418
Number of pages8
JournalJournal of Physical Chemistry C
Volume119
Issue number25
DOIs
StatePublished - Jun 25 2015

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Surfaces, Coatings and Films
  • Physical and Theoretical Chemistry

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