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研究了三元双相 Ｃｕ—３０Ｎｉ—２５Ｆｅ合金在 ７００—９００℃空气中的氧化在相同温度下合金的氧化速率都低于纯铜的，７００—８００℃的氧化动力学为抛物线规律，在９００℃初期为抛物线规律，后期变为线形规律，氧化膜最外层为近乎纯的氧化铜；内层是由三种金属组元的氧化物及组无间的复合氧化物所构成的混合区域，另外，在外氧化膜下面发生了Ｆｅ和Ｎｉ的内氧化，而内氧化区前沿的合金中仍保持为双相结构，该合金中难以发生Ｆｅ的选择性外氧化，这是组元间较小互溶度及合金双相结构限制了Ｆｅ的扩散的结果．
The oxidation of ternary dual-phase Cu-30Ni-25Fe alloy in air at 700-900 ℃ was studied. The oxidation rate of the alloy was lower than that of pure copper at the same temperature. The oxidation kinetics at 700-800 ℃ was parabolic. At 900 ℃ initial parabolic law, the latter into a linear rule, the outermost oxide film is almost pure copper oxide; the inner layer is composed of three kinds of metal oxide and group intermetallic compound oxide mixed region, the other , Internal oxidation of Fe and Ni occurs outside the outer oxide film while the frontal alloy in the inner oxidation zone remains in a dual phase structure where selective extra oxidation of Fe hardly occurs, which is a result of the smaller intermolecular miscibility And the duplex structure of the alloy limits the diffusion of Fe.