ISSN:
1432-0630
Schlagwort(e):
68.65 (or 66)
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Maschinenbau
,
Physik
Notizen:
Abstract A diffusion model of metal surface modification by plasma nitriding has been developed. This model takes into account the erosion effects at the plasma/solid interface occurring due to the ion bombardment of the surface. For constant sputtering rate, which is the usual situation during plasma nitriding, the growth of the sub-layers is well described by the analytical expressiong(t) =g 0,f −1 (t/t 0), whereg(t) is the sub-layer thickness at timet,g 0 andt 0 are parameters which depend on the treated material and plasma characteristics,f −1 is the inverse of the function — In(1 - x) + x), 0 ≤x ≤ 1. Under negligible erosion effects, the expression forg(t) reduces to the parabolic law. The diffusion zone (substratum) growth does not follow the parabolic law as well. However, the deviation occurs after long plasma nitriding time. The model can be used for experimentally determining the effective diffusion coefficients and the erosion rate during plasma nitriding of metal surfaces.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01571677
Permalink
