Effect of temperature on oxidation behavior of ternary Fe-15Cu-5Al alloy in pure oxygen

• Published in: Transactions of Nonferrous Metals Society of China Vol. 17; no. A01; pp. 180 - 183
• Main Author: 向军淮 赵琼 张文华
• Format: Journal Article
• Language: English
• Published: 01.11.2007
• Subjects: 氧化行为
• ISSN: 1003-6326

The effect of temperature on oxidation behavior of ternary Fe-15Cu-5Al （mole fraction, %） alloy in pure oxygen was studied. Fe-15Cu-5Al alloy presents an irregular high-temperature oxidation behavior between 700-1 000 ℃, though the kinetic curve at each temperature can be approximately considered as being composed of two quasi-parabolic stages. At 700 ℃ the alloy forms bulky stratified scales. On the contrary, at 800℃ the alloy forms an external protective Al2O3 layer. The trend of decrease of oxidation rate does not continue at elevated temperatures. Due to the high stress-growth effect at 900℃, the thin Al2O3 layer cannot completely prevent further oxidation of the alloy underneath. When the temperature rises to 1 000℃, the high stress-growth effect is more obvious and the alloy forms overgrown large nodules. Compared with the Fe-10Al binary alloy, the presence of 15 % Cu tends to greatly increase the flaw of the formed Al2O3 layer at elevated temperatures, resulting in a peculiar oxidation pattern of Fe- 15Cu-5Al alloy.