Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

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Anomalous ion accelerated bulk diffusion of interstitial nitrogen

Abrasonis, G.; Möller, W.; Ma, X. X.


Interstitial N diffusion under low energy (~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.

Keywords: Diffusion of impurities; Ion radiation effects; Anharmonic lattice modes

  • Physical Review Letters 96(2006), 065901


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