| 摘要 |
PURPOSE:To obtain a composite ceramic structural material having high and stable strength and good lubricity by reacting a green compact composed of graphite powder with a eutectic alloy composed mainly of silicon. CONSTITUTION:A eutectic alloy 2 containing silicon accounting for the major part of the alloy is impregnated under pressure into a green compact 1 composed of graphite powder and made to react with each other to form a silicon carbide layer 3 at the interface between the green compact 1 and the alloy 2 and precipitate an intermetallic compound 2 composed mainly of silicon. The eutectic alloy 2 is e.g. Si-Mo alloy, Si-Nb alloy and Si-Ta alloy and the content of Si is preferably >=80wt.%. The eutectic composition is used in order to lower the melting point and form the intermetallic compound. |
