摘要:
The method comprises the steps of: impregnating the part with a liquid impregnation composition containing at least a phosphate type compound, at least via a fraction of the outside surface of the part; applying a coating composition on said fraction of the outside surface of the part, the coating composition comprising a colloidal suspension of at least one refractory oxide in water, at least one compound essentially of the borosilicate type in powder form and having healing properties, and at least one metallic boride in powder form; and applying heat treatment after applying the coating composition.
摘要:
A fabric made of fibers of a carbon-precursor cellulose material is impregnated with a composition containing at least one inorganic ingredient having a function of promoting dehydration of cellulose, and the fabric is subjected to heat treatment. This treatment consists in raising temperature at a speed lying in the range 1.degree. C./min to 15.degree. C./min followed by keeping the temperature constant in the range 350.degree. C. to 500.degree. C., and it is followed by a step of washing the fabric. This produces directly an activated fabric of carbon fibers having a specific surface area of not less than 600 m.sup.2 /g, without subsequent activation treatment at a higher temperature.