Surface Modification of a FeCrAlY-Alloy by Ion Implantation and Oxidation for Potential Implant Applications
In this study the ODS alloy PM 2000 (Fe-Cr-Al-Y203) was subjected to different high temperature oxidation treatments with the aim to form a dense and adherent alumina layer. Attention was paid to the as-received material and to material implanted with aluminium or niobium. Ion implantation was used to attempt to achieve a pure alumina scale without the presence of small amounts of other oxide compounds. Results show that after isothermal oxidation the non-implanted material forms a dense and adherent alpha-alumina scale with nodules on the surface. Due to the presence of these modules the surface roughness increased to values higher than recommended for load bearing surfaces such as hip and knee replacements. It was found that increasing the aluminium concentration in the sub-surface layer by ion implantation did not lead to the formation of a nodule-free surface morphology. Implantation of niobium successfully surpressed the bodule formation during isothermal oxidation only at 900 degrees Celsius. At higher temperatures no differences could be observed between the oxide scale formed on non-implanted and niobium-implanted material.
Bibliographic Reference: Paper presented: SMT14 - International Conference on Surface Modification Technologies, Paris (FR) 11-13 September 2000
Availability: Available from European Commission, Joint Research Centre, Ispra (IT)
Record Number: 200012287 / Last updated on: 2000-08-10
Original language: en
Available languages: en