This article is cited in 3 papers

Compaction of a mixture of copper and molybdenum nanopowders modeled by the molecular dynamics method

S. P. Kiselev

Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russia

Abstract: A problem of compacting a mixture of copper and molybdenum nanopowders under the action of external loading generated by a spherical piston is solved by the molecular dynamics method. Interatomic interaction is calculated with the use of a multiparticle potential obtained by the embedded atom method. It is shown that compaction leads to significant deformations in copper, resulting in the loss of the crystalline structure; copper nanoparticles melt and fill the entire porous space. Molybdenum particles are deformed to a much smaller extent; they are not destroyed and preserve their crystalline structure. Under high loading, there appear voids in copper at the stage of compact extension; these voids rapidly grow in size and coagulate into one large void located in the nanocell center.

Keywords: nanoparticles, voids, copper, molybdenum, molecular dynamics, pressure, temperature.

UDC: 539.3+539.412

Received: 30.07.2007

 English version: DOI: 10.1007/s10808-008-0089-0

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