PART COMPRISING A SUBSTRATE AND AN ENVIRONMENTAL BARRIER

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The invention relates to a part (1) comprising a substrate (3) with at least one portion made of a silicon-containing material adjacent to a substrate surface (S) and an environmental barrier (2) formed on the substrate surface and comprising at least one first layer (7) comprising : at least 70% to 99.9% by moles of a rare earth disilicate of formula REa2SiO7, where REa is a rare earth element, and 0.1% to 30% by moles of at least one rare earth oxide of formula REbO3, where REb is a rare earth element other than REa.