Diffusion in Metals and Alloys

Quantifying the anomalous self-diffusion in molybdenum with first-principles simulations

“…4 This anomaly has historically been attributed to the onset of some additional diffusion mechanism contributing at high temperature. However, all such ad hoc assumptions have been ruled out, 10 and it is now believed that the vacancy mechanism alone is responsible for self-diffusion in bcc metals, as it is in fcc metals. The selfdiffusion rate D then depends on the vacancy concentration c v and the vacancy migration rate ⌫ v as…”

Copper‐Filled Carbon Nanotubes: Rheostatlike Behavior and Femtogram Copper Mass Transport

“…A general theory for electromigration has been published before. [28] The force causing atom displacements is expressed as the sum of a direct electrostatic force and an electron-mediated "wind force". [28] The current densities required for Cu electromigration in bamboo-like CNTs were measured to be 3.07 × 10 6 A cm -2 .…”

“…[28] The force causing atom displacements is expressed as the sum of a direct electrostatic force and an electron-mediated "wind force". [28] The current densities required for Cu electromigration in bamboo-like CNTs were measured to be 3.07 × 10 6 A cm -2 . [7] Regretfully, the maximum passing currents through the tubes during the present longitudinal or transverse Cu flows were not precisely measured in our experiments.…”

Ab initio Based Modeling of Radiation Effects in Multi-Component Alloys: Final Scientific/Technical Report

“…G is called the vacancy wind and accounts for the coupling between J A and J B through the vacancy flux J v [60]. It can be seen from Eq.…”

“…It should be noted that other phenomenological coefficients expressions have been developed and are reviewed in Refs. [59,60]. …”