Effects of single pulse energy on the properties of ceramic coating prepared by micro-arc oxidation on Ti alloy
Autor: | Jin Wang, Fuzhu Han, Mao-Hua Du, Yan Lu, Jun-Hua Wang |
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Rok vydání: | 2015 |
Předmět: |
Anatase
Materials science Scanning electron microscope Aluminate Metallurgy Alloy Oxide General Physics and Astronomy Surfaces and Interfaces General Chemistry Impulse (physics) engineering.material Condensed Matter Physics Surfaces Coatings and Films chemistry.chemical_compound chemistry Rutile engineering Surface roughness Composite material |
Zdroj: | Applied Surface Science. 324:405-413 |
ISSN: | 0169-4332 |
Popis: | The effects of single pulse energy on the properties of ceramic coating fabricated on a Ti–6Al–4V alloy via micro-arc oxidation (MAO) in aqueous solutions containing aluminate, phosphate, and some additives are investigated. The thickness, micro-hardness, surface and cross-sectional morphology, surface roughness, and compositions of the ceramic coating are studied using eddy current thickness meter, micro-hardness tester, JB-4C Precision Surface roughness meter, scanning electron microscopy (SEM) and X-ray diffraction (XRD). Single pulse energy remarkably influences the ceramic coating properties. The accumulative time of impulse width is an important parameter in the scientific and rational measurement of the film forming law of ceramic coating. The ceramic coating thickness approximately linearly increases with the cumulative time of impulse width. Larger impulse width resulted in higher single pulse energy, film forming rates and thicker ceramic coating thickness. The sizes of oxide particles, micro-pores and micro-cracks slightly increase with impulse width and single pulse energy. The main surface conversion products generated during MAO process in aqueous solutions containing aluminate are rutile TiO2, anatase TiO2, and a large amount of Al2TiO5. The effects of single pulse energy on the micro-hardness and phase composition of ceramic coating are not as evident as those of frequency and duty cycle. |
Databáze: | OpenAIRE |
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