Near-coincidence lattice method for the determination of epitaxy strains during oxidation of metals

TEM investigation of interfaces during cuprous island growth

“…This large lattice misfit makes the formation of coherently strained metal-oxide interfaces energetically unfavorable. It has been suggested that the occurrence of epitaxy in large-misfit systems is related to the formation of a near coincidence site lattice (CSL) interface configuration requiring lattice strains small enough to be energetically feasible [42][43][44][45]. In this case, the bilayer would be in a local minimum energy state if the mth atom of the overgrowth coincides with the nth atom of the substrate by introducing a minimum lattice misfit…”

Influence of the U3O7 domain structure on cracking during the oxidation of UO2

“…The background theory for coupling chemical diffusion to mechanical state was extensively explained in Refs. [18][19][20], and is based on previous work [21]. The diffusion coefficient we used depends on both the mechanical stress and the stress gradient:…”

“…The first calculation step computes the stress distribution induced by the connection of differentU 3 O 7 domains and UO 2 substrate.The second step computes theoxygen chemical diffusioncoupled to the previously calculated mechanical state. The background theoryfor coupling chemical diffusion to mechanical statewas widely exposed in [ 19 ], [ 20 ], [ 21 ],and is based on previous works [ 22 ]. The diffusion coefficient we used depends onboth the mechanical stress and the stress gradient:…”

Mechano-Chemical Aspects of High Temperature Oxidation: A Mesoscopic Model Applied to Zirconium Alloys

“…Godlewski 6 confirms that the stress level globally increases during oxidation. The presence of such compressive stresses is explained by epitaxial relations between metal and oxide as depicted by Salles-Desvignes et al 7 It is also experimentally well-known that stresses affect the microstructure of the Zr-ZrO 2 system during oxidation. For instance, stresses promote the zirconia transformation from monoclinic to tetragonal phase.…”