PURPOSE: To use a heat-resistant composite member for a long time by repairing a damaged part of the specified base material with a source material containing a metal source which can be maintained in a gas state at high temp. and can be changed into ceramic.
CONSTITUTION: Continuous pores 2h are formed to penetrate from the surface 2a to the back surface 2b of a porous base material 2 such as SiC, and the surface 2a is coated with a heat-resistant oxide coating layer 3 having sealing property. Then the back surface 2b is attached to a jacket 5 having a vacancy 4, surface 5a, hole 5ha and hole 5hb to produce a heat-resistant composite member 1. When cracks 8 generate in the coating layer 3 during the time when the member 1 is used at high temp., the vacancy 4 is filled with the source material for repairment maintained in a gas state at high temp. and high pressure. This source material passes through pores 2h to the cracks 8 to break the equibillium state in the vacancy 4 and to proceed pyrolysis and/or chemical reaction of the source material. Thus, ceramics 9 is precipitated to cover and seal cracks 8.
SAKAGAMI MASATAKE
TAKEMOTO TAKATOSHI
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