Kim, "Controlled formation of Mo[Se.sub.2] by Mo[N.sub.x] thin film as a diffusion barrier
against Se during selenization annealing for CIGS solar cell," Journal of Alloys and Compounds, vol.
Caption: Figure 9: The diffusion barriers
[E.sub.Diff] for the system before Al alloying, see the two middle curves in yellow and orange (ref), the diffusion barrier
for the alloyed system from the octahedral site oc1 in direct vicinity of an Al atom to a tetrahedral site with 1 neighbouring Fe, 2 neighbouring Mn, and 1 neighbouring Al atoms (three upper curves oc1), and the diffusion barriers
for the alloyed system from the octahedral site oc2 distant to an Al atom to a tetrahedral site with 2 neighbouring Fe and 2 neighbouring Mn atoms (three lower curves oc2).
An alternative solution is the introduction of a diffusion barrier
between the nickel and the bonding gold surface.
A cobalt diffusion barrier
hinders the tendency for cobalt to poison diamond growth, and the process improves the adhesion of coating to the substrate.
The micro invasive treatment method creates a diffusion barrier
not on the surface but within the hard tissue thus stabilizing and blocking the caries.
without any diffusion barrier
, the proprietary low temperature CIGS deposition
This may be explained by the high amount of feed MB (1% w/w) which could affect the properties of the BSA matrix network, thus affecting the diffusion barrier
. The slow release step of MB may occur through surface erosion of the BSA matrix.
The dissolvable solderable coating for electronics mostly consists of an adhesive layer (Cr, Ni, Ti, Al) diffusion barrier
(Ni, Cr, Pt Pd) and a solderable layer (Ag, Au, Cu, Ni).
The protective effect is attributed to the formation of molten glass layer on steel surface at high temperature, which acts as an effective oxygen diffusion barrier
. This glass-based protective coating by low-cost and easily handling method is potentially applicable in a slab reheating process.
The other method is a coating of diffusion barrier
to the hydrogen.
Such "diffusion potentials" are expected to be present in all processes that involve diffusion of charged species due to differences in inherent ion mobility and the perm-selective nature of the diffusion barrier
. Thus, the subsurface demineralization is largely diffusion-controlled, and the rate of lesion progression may be expected to depend on factors that govern the diffusion process.