The Effects of Yttrium Ion Implantation Upon the Oxidation Behaviour of an Austenitic Stainless Steel
Studies have been carried out on the effect of yttrium ion implantation into 20% Cr — 25% Ni — niobium stabilised stainless steel upon the long term oxidation behaviour of the steel in carbon dioxide at 700° C, 800° and 850° C. The maximum depth of penetration of yttrium ions was 0.25 μm and the initial yttrium concentration was 0.2%. The oxidation resistance of the steel was improved by the implantation by up to a factor of 2–3 at the higher temperatures. The extent of oxidation of the implanted steel were similar to those of 20/25/Nb steels containing alloy additions of 0.11–0.41% yttrium. The oxide adherence was also increased by the implantation at 800° and 850° C, although not to the same extent as with the alloy additions of yttrium.
KeywordsAustenitic Stainless Steel Oxidation Resistance Oxidation Behaviour Alloy Addition Yttrium Concentration
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- 1.J.E. Antill and K.A. Peakall, J. Iron and Steel Inst, 205, 1967, 1136.Google Scholar