PURPOSE: To obtain a reinforcing fiber prevented from deterioration which is used as a titanium matrix compost material by forming diffusion-inhibited coatings consisting of a specified metal coating and an outer layer coating of the oxide of the same metal, on the surface of a ceramic fiber.
CONSTITUTION: One metal from among the groups including yttrium, zirconium and hafnium is deposited on the surface of a silicon carbide base ceramic fiber to form a coating of the metal by plasma sputtering. The obtained coated fiber is subjected to heat treatment and the thermodynamically stable oxide of the same metal is formed as the outer layer to obtain the ceramic fiber having the diffusion-inhibited coatings consisting of two different kinds of coatings. When a fiber-reinforced metal composite material is produced by embedding this coated fiber in a titanium matrix, titanium and oxygen are absorbed by the diffusion-inhibited coatings to prevent the deterioration of the ceramic fiber.
FUIRITSUPU JIYON DOABAA
TOREBAA UIRIAMU KURAIN
ROBAATO RICHIYAADO KIISHIYUKE
ROBAATO AANESUTO SAMUKU
