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Chemistry

Hamed Attariani

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Full-Text Articles in Mechanical Engineering

Mechanochemical Continuum Modeling Of Nanovoid Nucleation And Growth In Reacting Nanoparticles, Valery I. Levitas, Hamed Attariani Feb 2015

Mechanochemical Continuum Modeling Of Nanovoid Nucleation And Growth In Reacting Nanoparticles, Valery I. Levitas, Hamed Attariani

Hamed Attariani

Hollow nanoparticles (NPs) are produced by void nucleation and growth during chemical reactions. However, there is no proper understanding of nucleation and growth mechanisms and their predictive modeling. Models based on the Kirkendall effect predict the process time, which is larger by orders of magnitude than in experiment. This is why some works propose that a large tensile pressure in the core causes void nucleation. Here, a continuum-mechanics approach for nucleation and growth of a nanovoid in reacting NPs based on the Kirkendall effect is developed. In contrast to previous approaches, void nucleation and the effects of stresses are treated ...