Oxidation and Corrosion of Al₈₆Ce₁₀Fe₄ Metallic Glass

Abstract:

High temperature oxidation of Al₈₆Ce₁₀Fe₄ amorphous alloy at 630°C in static air for 15, 60, 300, 600, 1,200, 3,000, 6,000 and 12,000 minutes was studied. The morphology, composition and microstructure of the oxide films were investigated using SEM, EDS and XRD. The hardness and corrosion resistance of the oxide films were determined by micro-indentation and polarization technique. The results indicate oxidation at 630 °C instigates nucleation, growth and coarsening of fcc-Al, Al₁₁Ce₃ and Al₁₃Fe₅ crystalline phases inside the Al₈₆Ce₁₀Fe₄ matrix, reducing the hardness of the alloy, and oxidation of the alloy surface, forming crystallized Al₂O₃ and AlFeO₃ chemical compounds. Active anodic dissolution behavior and diffusion-controlled cathodic polarization of the oxidized alloy were observed. The corrosion resistance of the oxide films rates in the level of 10^-7 ~10^-5 [A/cm²]. The results demonstrate Al₈₆Ce₁₀Fe₄ amorphous alloy, as a new-developed high temperature high strength glass, exhibits potential application for aerospace and national defense in terms of its high mechanical strength, high temperature endurance, and satisfactory oxidation and corrosion resistance.

• Periodical: Materials Science Forum (Volume 1013)
• Pages: 59-65
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1013.59
• Online since: October 2020
• Authors: J. Zhang*, J. Jia, A. Chang, T. Zhao, C. Chang, S. An
• Keywords: AlCeFe Alloy, Corrosion Resistance, Metallic Glass, Oxidation

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