Melt dispersion versus diffusive oxidation mechanism for aluminum nanoparticles: Critical experiments and controlling parameters

Valery I. Levitas, Michelle L. Pantoya, Birce Dikici

Research output: Contribution to journalArticlepeer-review

98 Scopus citations

Abstract

Critical experiments were performed on Al and Mo O3 thermites. The diameter and alumina shell thickness of the Al nanoparticles were varied, and flame propagation velocities were measured. The results strongly support the melt-dispersion mechanism and contradict the diffusion oxidation mechanism. The parameters that control the oxidation rate and flame velocity are justified and directions for the synthesis of Al nanoparticles (which are opposite to the current directions based on diffusion oxidation) are suggested. An equation for the flame velocity versus Al nanoparticle geometrical parameters, thermomechanical properties, and synthesis parameters is formulated.

Original languageEnglish
Article number011921
JournalApplied Physics Letters
Volume92
Issue number1
DOIs
StatePublished - 2008

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