Coating precursor and method for coating a substrate with a refractory layer

摘要

The invention concerns a coating precursor comprising a silicone resin, a metal compound and an organic solvent capable of dissolving said silicone and of suspending said metal compound, said silicone resin and said metal compound being capable of chemically reacting so as to produce a solid layer on a substrate after the organic solvent has evaporated and a cohesive refractory layer after a calcination process. The invention also concerns a method for coating a specific surface of a substrate with at least a refractory silicon-containing layer which consists in coating the substrate with a coating precursor of the invention, so as to form a raw layer and carrying out a heat treatment so as to calcine said raw layer and form a cohesive refractory layer. The invention enables to obtain a protective coating resistant to oxidizing environments, liquid metal or molten salt.