| 摘要 |
PROBLEM TO BE SOLVED: To obtain a copper-carbon fiber composite having a low coefft. of expansion and high heat conductivity by incorporating a specified metallic element into the interfaces between a copper matrix and carbon fibers and allowing specified interfacial layers to exist. SOLUTION: The copper-carbon fiber composite contains a metallic element having a higher m.p. than copper and forming a compd. with carbon in the interfaces between the copper matrix made substantially of only copper and carbon fibers and has interfacial layers formed by allowing the metallic element to react with Cu and/or C or to enter into solid soln. in Cu and/or C. The metallic element is preferably Si, Ti, V, Cr, Zr, Nb, Mo, Hf, Ta or W. The carbon fiber content of the composite is preferably 20-70 vol.%. In the case of <20 vol.%, thermal expansion suppressing effect is low. In the case of >70 vol.%, heat conductivity is reduced. The average thickness of the interfacial layers is preferably <=2μm. In the case of >2μm, heat conductivity is reduced. The composite is produced by mixing Cu powder with carbon fibers and powder of the metallic element and press-compacting the mixture under heating in a short time.
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