MICROSTRUCTURE AND PROPERTIES OF MAO COMPOSITE COATINGS CONTAINING NANORUTILE TiO2 PARTICLES

Zhenwei Li and Shichun Di
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Zhenwei Li: School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, P. R. China
Shichun Di: School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, P. R. China

Surface Review and Letters (SRL), 2017, vol. 24, issue 03, 1-12

Abstract: Microarc oxidation (MAO) composite coatings containing rutile TiO2 were produced on 2024 aluminum alloy in an electrolyte with nanorutile TiO2 particles. The microstructure and properties of the composite coatings were analyzed by SEM, EDS, laser confocal microscope, XRD, Vickers hardness tester, scratch test and friction test, respectively. The results showed that the composite coatings consisted of γ-Al2O3, α-Al2O3, mullite and rutile TiO2. With increasing concentration of rutile TiO2 particles in the electrolyte, the compactness of the composite coatings was improved significantly. The abrasion performance of the microarc oxidation composite coatings containing rutile TiO2 was better than that of MAO coatings without rutile TiO2.

Keywords: 2024 Aluminum alloy; microarc oxidation; nanorutile TiO2 particles; composite coatings; adhesion strength; abrasion performance (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1142/S0218625X17501153

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