FUSED SAND-RESISTANT TURBINE PART

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The present invention relates to a turbine part, comprising a substrate, an environmental barrier comprising at least one layer selected from a thermally insulating layer, a sub-layer adapted to promote adhesion between the substrate and a thermally insulating layer, and a protective layer adapted to protect the substrate from oxidation and/or corrosion, the environmental barrier at least partially covering the substrate, at least one reactive layer being adapted to react with at least one CMAS compound, the reactive layer covering at least part of the environmental barrier. The invention is characterized in that the material of the reactive layer comprises an oxide of formula A′A″BO5-δ, A′ being selected from a rare earth and yttrium, A″ being selected from a rare earth yttrium and aluminum, B being selected from titanium, zirconium, lufnium, tantlum and niobium, wherein δ is a real number between 0 and 0.5.