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研究了含25,50与75wt%Ag的Cu-Ag合金在650~750℃空气中的氧化。结果表明,在所有的情况下合金均生成氧化铜的外氧化膜,其下为由Ag与Cu2O组成的混合内氧化带。对Cu-50Ag与Cu-75Ag合金在其内氧化带前沿尚出现含Cu的Ag基固溶体的单相层。合金氧化时Ag以金属态留下,在金属Cu的消耗带中自然地成为惰性标记。也有少许细Ag颗粒嵌入生成的外氧化膜中,纯Cu和三种合金的氧化都遵循抛物线规律,其氧化速率常数随合金中Ag含量的增加而降低,从多侧面讨论合金的双相组织对其氧化过程的影响。
The oxidation of Cu-Ag alloy containing 25, 50 and 75wt% Ag in air at 650-750 ℃ was studied. The results show that the outer oxide film of copper oxide is formed in all the cases under which the mixed inner oxidation zone consisting of Ag and Cu2O is formed. For Cu-50Ag and Cu-75Ag alloys, a monolayer of Cu-containing Ag-based solid solution appears on the front of its internal oxidation zone. When the alloy is oxidized, Ag remains in the metallic state and naturally becomes an inert mark in the depletion zone of metallic Cu. There is also a small amount of fine Ag particles embedded in the formed outer oxide film. The oxidation of pure Cu and the three alloys follows a parabolic law. The oxidation rate constant decreases with the increase of the Ag content in the alloy. The dual phase structure of the alloy The impact of its oxidation process.