Formation of Nanosized Surface Layers of 03Kh17N12M2 Stainless Steel by Implantation of N+ Ions

Resumo

Accumulation of nitrogen in nanosized surface layers of 03Kh17N12M2 stainless steel has been detected upon N⁺ ion implantation up to 14 at % together with metal nitrides, mainly of chromium nitride CrN and interstitial solid solution. It has been demonstrated that N⁺ ion implantation accompanied by preliminary irradiation by Ar⁺ and O⁺ ions decreases maximum nitrogen concentration by at least two times. It is assumed that this is stipulated by segregation to surface layers of iron atoms upon irradiation by Ar⁺ ions as well as formation of chromium oxide Cr₂O₃ and chromium hydroxide CrOOH upon irradiation by O⁺ ions.