Al2O3/Si3N4 nanocomposite coating on aluminum alloy by the anodizing route: Fabrication,characterization, mechanical properties and electrochemical behavior |
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| Affiliation: | 1. High Magnetic Field Laboratory, Chinese Academy of Sciences and University of Science and Technology of China, Hefei 230031, China;2. Department of Physics and Engineering and Key Laboratory of Material Physics, Zhengzhou University, Zhengzhou, Henan 450052, PR China;3. Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China;1. School of Materials Science and Engineering, University of Jinan, Jinan 250022, China;2. Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China;1. Department of Chemistry, School of Natural Sciences, Shiv Nadar University, Gautam Budh Nagar 201314, Uttar Pradesh, India;2. Department of Condensed Matter Physics and Material Sciences S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700098, India;3. Nanotechnology and Integrated Bioengineering Centre (NIBEC), University of Ulster at Jordanstown, Shore Road, Newtownabbey BT37 0QB, United Kingdom;4. Department of Physics, School of Natural Sciences, Shiv Nadar University, Gautam Budh Nagar 201314, Uttar Pradesh, India;1. Departamento de Química (QMC), Universidade Federal de Santa Catarina (UFSC), 88040-900 Florianópolis, SC, Brazil;2. Departamento de Química, Universidade Federal do Paraná (UFPR), 81531-980 Curitiba, PR, Brazil;3. Instituto Nacional de Ciência e Tecnologia de Energia e Ambiente (INCT E&A), Universidade Federal da Bahia (UFBA), 40170-115 Salvador, BA, Brazil;4. Departamento de Engenharia Química (EQA), Universidade Federal de Santa Catarina (UFSC), 88040-900 Florianópolis, SC, Brazil;5. Departamento de Engenharia de Materiais e Cerâmica, Universidade de Aveiro, 3810-193 Aveiro, Portugal;1. School of Chemistry, Biology and Material Engineering, Suzhou University of Science and Technology, Suzhou 215009, China;2. Shanxi Province Key Laboratory of Functional Nanocomposites, North University of China, Taiyuan 030051, China |
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| Abstract: | An Al2O3/Si3N4 nanocomposite coating was successfully fabricated on commercial aluminum alloy. Hardness measurements, polarization and electrochemical impedance spectroscopy (EIS) were employed to study the mechanical and corrosion behaviors of the coatings. Field-Emission Scanning Electron Microscopy (FE-SEM) equipped with Energy Dispersive Spectroscopy (EDS) and X-ray diffraction (XRD) were utilized to characterize the surface morphology and phase composition of the coatings. Also, coatings abrasive wear properties were evaluated with a modified ASTM G105 standard. FE-SEM image, EDS and XRD analysis revealed the presence of Si3N4 in the coating. Furthermore, the results showed hardness of the coatings to increase from 380±50 HV for the anodized layer to 712±36 HV for the composite coatings that were formed in an electrolyte containing 6 gr/lit Si3N4 nanoparticles. Electrochemical measurements indicated that corrosion resistance of the nanocomposite coating significantly increased compared to the anodized coating. In addition, the effect of Si3N4 nanoparticles into the nanocomposite coatings on abrasive wear mechanism and mass loss rate of the coatings was investigated. |
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| Keywords: | Anodizing Nanocomposite coating Hardness Wear resistance Electrochemical behavior |
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