| 摘要 |
PURPOSE:To enable the characteristics of a fundamental structure to be sustained by positively sealing defective parts of cracks, pinholes, crazings and like defects in a ceramics oxidation-resistant coating which is formed on a carbon fiber reinforced carbon material having high heat resistance and oxidation resistance for an object such as a space shuttle or the like that flies in oxygen-contained atmospheric conditions of an atmosphere or the like. CONSTITUTION:Alkali silicate of alkali silicate glass is impregnated in the defective part of cracks, pinholes, crazings and the like in a ceramics oxidation- resistant coating formed on the surface of a carbon fiber reinforced carbon material and, subsequently, it is allowed to stand in a room temperature and then subjected to a gelatinization via evaporation of moisture, and further, it is made into a close glass-like substance through a heat treatment, whereby hole sealing of cracks, pinholes, crazing and the like is made positive and the close adherence of carbon fiber reinforced carbon with ceramics coating is made positive, thereby enabling weight lightening to be obstructed and functions to be maintained. |
