研究了具有均匀两相组织的粉末冶金Cu 2 5Cr和Cu 50Cr合金在 0 .1MPa纯氧气中的氧化。与组织不均的铸态Cu Cr合金相似 ,氧化后两种成分的粉末冶金Cu Cr合金均形成了复杂的混合氧化膜 ,但未形成连续的Cr2 O3层。而经机械合金化法获得的铬颗粒大小在 1 μm左右的Cu 2 0Cr合金 ,氧化时则形成了连续的Cr2 O3层。可见 ,在二元双相合金中 ,合金的氧化行为与合金的组织形态、大小和分布密切相关。 The oxidation of powder metallurgy Cu 2 5Cr and Cu 50Cr alloys with uniform two-phase microstructure in 0.1 Mpa pure oxygen was studied. Similar to the as-cast Cu Cu alloy with uneven microstructure, both of the two components of the powder metallurgy Cu Cr alloy formed a complicated mixed oxide film, but no continuous Cr 2 O 3 layer was formed. The Cu 2 0Cr alloy with chromium particle size about 1 μm obtained by mechanical alloying method forms a continuous layer of Cr 2 O 3 when oxidized. It can be seen that in binary binary alloys, the oxidation behavior of the alloy is closely related to the morphology, size and distribution of the alloy.