摘要
研究了三种Ｆｅ－Ｃｕ合金（含Ｃｕ分别为２５、５０和７５ｗｔ％）在６００～８００℃空气中的氧化行为。结果表明它们的氧化均遵循近似的抛物线规律且氧化速率低于组成合金的两纯金属．合金生成颇复杂的氧化膜．基于合金显微组织的双相特征和两金属生成氧化物热力学特性的差异，对氧化过程作了详细地讨论．
The oxidation of three Fe Cu alloys containing 25,50 and 75 wt% Cu respectively has been studied in air at 600～800℃. The oxidation of all the alloys followed parabolic rate law only approximately and oxidized at the rates lower than those of the two pure metals. In all cases the scales were composed of two main layers: the inner layer contained a mixture of Cu metal with iron oxide, while the composition of the outer layer depended on the Cu content of the alloy. In particular, for the two alloys richer in iron the external layer was mostly composed of iron oxides with some copper particles which were oxidized only in the external zone, while for the alloy richest in copper the external layer contained a complex mixture of iron oxides, copper particles and double oxides surmounted by an outermost layer of copper oxide. No depletion of iron in the alloy beneath the region of internal oxidation has been observed. The peculiar microstructure of the scales observed for these alloys is examined in relation with the limited solubility of iron in copper and with their consequent duplex phase nature.
出处
《腐蚀科学与防护技术》
CAS
CSCD
1997年第3期173-181,共9页
Corrosion Science and Protection Technology
