Patent ID: 6331362
Filing Date: 2001-12-18
Classification: C04B,Y10T

Abstract:
Composite materials having a highly refractive ceramic matrix reinforced by fibers that are sensitive to oxygen at low temperature, said composite materials being made by a solid process from said fibers and a slip containing ceramic powder and at least one densification additive, said materials comprising over their entire outer surface;either at least one layer of a precursor of borosilicate glass;or a layer of borosilicate glass;or a layer containing at least one silicate corresponding to said at least one densification additive; silica; and a vitreous boron-containing silicate phase; said layer protecting said composite materials in an oxidizing atmosphere, even at high temperature;said composite materials having at least one of said layers at different stages in the implementation of treatment for the purpose of protecting them against being oxidized at high temperature.