Nitridation effects on the oxidation mechanisms of an ods Fe–Al intermetallic alloy

An ODS Fe–Al intermetallic alloy has been nitrided at low-energy high flux implantation diffusion at 400 8C leading to the formation of hexagonal Al–N and a-Fe segregation. Its high temperature behaviour is subsequently evaluated under isothermal oxidation at 800 8C. Microscopy techniques (SEM, TEM) will show that nitridation hinders aluminium outward diffusion and enhances iron outward diffusion giving rise to a layered structure. # 2004 Elsevier B.V. All rights reserved.