| 摘要 |
PURPOSE:To provide a method for antioxidizing treatment of a carbon-fiber reinforced carbon material in which a coating layer capable of withstanding severe dynamic oxidizing conditions can be formed on the surface of the carbon- fiber reinforced carbon material. CONSTITUTION:The objective method is composed of an inner-layer coating step for bringing the substrate surface of a carbon-fiber reinforced carbon material into contact with SiO2 gas and forming an SiC coating layer by a conversion method, an intermediate coating step for coating the surface with an aqueous slurry containing granular molybdenum disilicide and an organic binder, then heating the coated substrate at a high temperature of 2050 deg.C in argon, fusing the granular molybdenum disilicide, diffusing the MoSi2 into the SiC coating structure in the inner layer and forming a composite film of the SiC- MoSi2 and an outer-layer coating step for coating the substrate with the aqueous slurry, then heating the coated substrate at 1500 deg.C temperature in argon and forming a porous MoSi2 film. If an SiO2 glass film is formed as the outermost layer coating, antioxidizing performance can further be improved. |
