Effects of Rare Earth (RE) Additives on Performances of Micro-Arc Oxidation Coatings Formed on Aluminum Alloy

Abstract:

Scanning electron microscope (SEM), X-ray diffraction (XRD), VSP electrochemical workstation and friction and wear tester equipment are applied for comparing the effects on organizations and properties of micro-arc oxidation fabricated on a piece of aluminum alloy sample with additives of La (NO3)3 or Ce (SO4)2. The results revealed that both coatings with these two different additives are consisted of α-Al2O3 and γ-Al2O3, but the peaks of main phases are evident with La (NO3)3. Compared the two different coatings, it could be found that less micro-cracks can be observed from the coating with La (NO3)3 additive. Beside this, aperture in this coating is also smaller and corrosion resistance and wear resistance are much better.

• Periodical: Advanced Materials Research (Volumes 850-851)
• Pages: 140-143
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.850-851.140
• Online since: December 2013
• Authors: Dan Huang, Xiao Yan Zhang, De Feng Wu, Xiao Song Zhou
• Keywords: Aluminium Alloy, Micro-Arc Oxidation, Rare Earth Additives

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