| 摘要 |
PROBLEM TO BE SOLVED: To easily produce alumina dispersion strengthened copper where internal oxidation proceeds to the vicinity of the center of alloy powder and excellent strength, heat resistance, and electric conductivity are provided. SOLUTION: An alloy powder 1, having a composition consisting of Al and the balance Cu, and an oxidizing agent 3 are mixed, and the resultant mixture is mixed and compressed by means of rods 5 of a rod mill. By this procedure, the alloy powder 1 and the oxidizing agent 3 are put between the rods 5 and compressed, by which a lamellar powder 7 in which the oxidizing agent 3 is provided between mutually pressure-bonded alloy powders 1 is formed. By repeating this step, the thickness of the alloy powder 1 is reduced and the thickness Y(μm) is regulated so that it satisfies 32.X<-8> >=Y>=20 (where X means the weight percentage of Al in the powder). When heat treatment is applied to this lamellar powder 9, oxidation of the alloy powder 1 takes place from the surface of the lamellar powder 9 and the contact part with the oxidizing agent 3 and proceeds inward. Because respectice layers of the alloy powder 1 become extremely thin, internal oxidation can be allowed to processed easily to the vicinity of the center of the alloy power 1.
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