This article is cited in 4 papers

Solids

On self-diffusion and surface energy upon compression or tension of an iron crystal

M. N. Magomedov

Institute of Geothermy Problems, Makhachkala

Abstract: The dependences of the activation parameters (formation of vacancies and self-diffusion) and specific surface energy on the volume fraction $(V/V_0)$ are calculated in terms of the Mie-Lenard-Jones pair potential of interatomic interaction for bcc-Fe along the 300-K and 3000-K isotherms. It is shown that under strong compressions $(V/V_0< 1)$ or tensions $(V/V_0 > 1)$, the surface energy has a negative value, which must lead to the crystal structure fragmentation.

Received: 03.05.2012

 English version: Technical Physics, 2013, 58:3, 380–387

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