Anomalous ion accelerated bulk diffusion of interstitial nitrogen.
Interstitial N diffusion under low energy (approximately 700 eV) Ar+ bombardment at 673 K in ion beam nitrided austenitic stainless steel is investigated. Ar+ ion bombardment increases the N mobility in depths far beyond the ion penetration depth, resulting in an increased broadening of the N depth profile as a function of Ar+ flux. This effect cannot be explained by any established mechanism of radiation-enhanced diffusion. An explanation based on quasiparticle-enhanced mobility is proposed.
Abrasonis
Gintautas
G
Institute of Ion Beam Physics and Materials Research, Forschungszentrum Rossendorf, PF-510119, 01314 Dresden, Germany. g.abrasonis@fz-rossendorf.de
Möller
Wolfhard
W
Ma
Xin Xin
XX