<abstract xmlns="http://www.w3.org/1999/xhtml">The purpose of this work is to produce and characterize (chemical composition and roughness parameters) porous coatings enriched in calcium and phosphorus on the titanium (CP Titanium Grade 2) by plasma electrolytic oxidation. As an electrolyte, a mixture of phosphoric acid H3PO4 and calcium nitrate Ca(NO3)2·4H2O was used. Based on obtained EDS and roughness results of PEO coatings, the effect of PEO voltages on the chemical composition and surface roughness of porous coatings was determined. With voltage increasing from 450 V to 650 V, the calcium in PEO coatings obtained in freshly prepared electrolyte was also found to increase. In addition, the Ca/P ratio increased linearly with voltage increasing according to the formula Ca/P = 0.035·U+0.176 (by wt%) and Ca/P = 0.03·U+0.13 (by at%). It was also noticed that the surface roughness increases with the voltage increasing, what is related to the change in coating porosity, i.e. the higher is the surface roughness, the bigger are pores sizes obtained.</abstract>

The purpose of this work is to produce and characterize (chemical composition and roughness parameters) porous coatings enriched in calcium and phosphorus on the titanium (CP Titanium Grade 2) by plasma electrolytic oxidation. As an electrolyte, a mixture of phosphoric acid H3PO4 and calcium nitrate Ca(NO3)2·4H2O was used. Based on obtained EDS and roughness results of PEO coatings, the effect of PEO voltages on the chemical composition and surface roughness of porous coatings was determined. With voltage increasing from 450 V to 650 V, the calcium in PEO coatings obtained in freshly prepared electrolyte was also found to increase. In addition, the Ca/P ratio increased linearly with voltage increasing according to the formula Ca/P = 0.035·U+0.176 (by wt%) and Ca/P = 0.03·U+0.13 (by at%). It was also noticed that the surface roughness increases with the voltage increasing, what is related to the change in coating porosity, i.e. the higher is the surface roughness, the bigger are pores sizes obtained.

Fabrication and characterisation of porous, calcium enriched coatings on titanium after plasma electrolytic oxidation under DC regime

Faculty of Mechanical Engineering, Department of Engineering and Informatics Systems, Division of Bioengineering and Surface Electrochemistry

Institute of Physics, Faculty of Mining and Geology

Advances in Materials Science

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The purpose of this work is to produce and characterize (chemical composition and roughness parameters) porous coatings enriched in calcium and phosphorus on...

Fabrication and characterisation of porous, calcium enriched coatings on titanium after plasma electrolytic oxidation under DC regime

Published Online: Jan 11, 2018

Page range: 55 - 67

DOI: https://doi.org/10.1515/adms-2017-0021

Keywords
Plasma Electrolytic Oxidation PEO, Micro Arc Oxidation MAO, SEM, titanium, porous coatings, concentrated phosphoric acid HPO, calcium nitrate Ca(NO)·4HO

© 2017 K. Rokosz et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fabrication and characterisation of porous, calcium enriched coatings on titanium after plasma electrolytic oxidation under DC regime

Published Online: Jan 11, 2018

Page range: 55 - 67

DOI: https://doi.org/10.1515/adms-2017-0021

KeywordsPlasma Electrolytic Oxidation PEO, Micro Arc Oxidation MAO, SEM, titanium, porous coatings, concentrated phosphoric acid HPO, calcium nitrate Ca(NO)·4HO

© 2017 K. Rokosz et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Plasma Electrolytic Oxidation PEO, Micro Arc Oxidation MAO, SEM, titanium, porous coatings, concentrated phosphoric acid HPO, calcium nitrate Ca(NO)·4HO