Multi-layered silicides coating for vanadium alloys for generation IV reactors

► Thermodynamical analyses allow optimizing the pack-cementation diffusion process. ► Si deposition leads to a multi-layered silicide coating that is very adherent to the substrate. ► Silicide coating is efficient for protecting vanadium alloys against oxidation by hot gases. ► VSi2 develops a protective layer of silica at 650 °C in air. ► Pesting does not occur for VSi2 in contrast to other refractory silicides (MoSi2, NbSi2).