METHOD OF PROTECTING A CMC MATERIAL THERMOSTRUCTURAL PART MADE OF CERAMIC MATRIX COMPOSITE MATERIAL AGAINST WEAR, A COATING, AND A PART OBTAINED BY THE METHOD

摘要

A method of protecting a thermostructural part made of ceramic matrix composite material against wear by coating the part is disclosed. The coating is made by providing a mixture comprising colloidal silica, a powdered silico-aluminous and/or aluminous refractory ceramic material, and water; applying at least one layer of the mixture on the part; drying the layer; and placing the part at a temperature greater than 1000° C., thereby firing the layer and forming an enamel coating. The invention is applicable to SiC moving flaps for a turbojet nozzle.