Method for coating a refractory alloy part, and the part thus coated

A method for coating a refractory alloy part, comprising:

• coating of at least one zone of the refractory alloy part, using a treatment composition comprising at least one type of preceramic polymer, a solvent and at least one active filler,
• heat treating the refractory alloy part coated with the treatment composition, the heat treatment allowing to at least partially convert the preceramic polymer to form a ceramic layer,
• the active filler being chosen to form, by solid or liquid diffusion, on a surface of the refractory alloy part, at least one alloy which is at least ternary resulting from a co-reactivity of the active filler with the refractory alloy part and the preceramic polymer, the at least ternary alloy forming a continuous layer between the surface of the refractory alloy part and the ceramic layer obtained by conversion,
• wherein the heat treatment is carried out so as to form a continuous layer of the at least ternary alloy, which protects the refractory alloy part from oxidation, wherein the treatment composition comprises, relative to the total weight of the treatment composition, a weight proportion of between 40% and 66% of at least one active filler,
• and
• wherein an active filler/preceramic polymer weight ratio is greater than or equal to 2.