The effect of self-stress on diffusion in solids

Journal Article · Fri Oct 01 04:00:00 EDT 1982 · Acta Metall.; (United States)

DOI:https://doi.org/10.1016/0001-6160(82)90023-2· OSTI ID:5830848

Larche, F C; Cahn, J W

The authors demonstrate that the local diffusion flux in solids depends on stresses arising from compositional inhomogeneities (and even the shape) of the entire specimen. This dependence of loca flux on distant inhomogeneity is considered to be a failure of Fick's law. From an equation relating stress and composition field the authors can find special cases in which a diffusion law resembling Fick's law occurs but the anisotropy of the apparent diffusion coefficient reveals that non-local factors are still present. The authors also examine the case of diffusion through a thin plate for dependence of diffusion on the composition field and predict much deeper diffusional penetration and accumulatio on the far side.

• Research Organization: Universite de Montpellier 2, 34060 Montpellier-Cedex
• OSTI ID: 5830848
• Journal Information: Acta Metall.; (United States), Journal Name: Acta Metall.; (United States) Vol. 30:10; ISSN AMETA
• Country of Publication: United States
• Language: English

Related Subjects

656000* -- Condensed Matter Physics
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
CRYSTAL STRUCTURE
DIFFUSION
FICK LAWS
FRICTION
HETEROGENEOUS EFFECTS
INHOMOGENEOUS FIELDS
INTERNAL FRICTION
NEUTRON FLUX
NONLOCAL POTENTIAL
POTENTIALS
RADIATION FLUX
SELF-DIFFUSION
SOLIDS
STRESSES