SiC based fiber-reinforced ceramic composite material resistance environmental coat and its production mannered

摘要

PPROBLEM TO BE SOLVED: To improve the ununiformity in the wettability of the surface in a silicon carbide fiber-reinforced ceramic matrix composite (CMC), at the time when a steam corrosion resistance coating (EBC) is applied to the surface of the CMC via crystallized glass (BMAS), and to realize the coating with a uniform thickness. PSOLUTION: In the coating, on the surface layer of an SiC-based fiber-reinforced ceramic (CMC) base material 1, an intermediate layer composed of a layer 4 impregnated with a mixture of the crystallized glass (BMAS) composed of BaO-MgO-AlSB2/SBOSB3/SB-SiOSB2/SBand a rare earth silicate, and a CVD-SiC layer 2 obtained by impregnating an SiC layer with a mixture of BMAS and a rare earth silicate, deposited so as to be the porous one on the surface of the base material by a CVD process is formed, and a rare earth silicate layer 5 is further formed on the CVD-SiC layer 2 as a top coat. PCOPYRIGHT: (C)2006,JPO&NCIPI