Surface Modification of Diatomite-Based Micro-Arc Coatings for Magnesium Implants Using a Low-Energy High-Current Electron Beam Processing Technique
Mariya B. Sedelnikova,
Alexander D. Kashin,
Olga V. Bakina,
Pavel V. Uvarkin,
Nikita A. Luginin,
Yurii P. Sharkeev,
Margarita A. Khimich,
Olga V. Kazmina,
Edgar S. Dvilis,
Konstantin V. Ivanov
Affiliations
Mariya B. Sedelnikova
Laboratory of Physics of Nanostructured Biocomposites, Institute of Strength Physics and Materials Science of SB RAS, Tomsk 634055, Russia
Alexander D. Kashin
Laboratory of Physics of Nanostructured Biocomposites, Institute of Strength Physics and Materials Science of SB RAS, Tomsk 634055, Russia
Olga V. Bakina
Laboratory of Nanobioengineering, Institute of Strength Physics and Materials Science of SB RAS, Tomsk 634055, Russia
Pavel V. Uvarkin
Laboratory of Physics of Nanostructured Biocomposites, Institute of Strength Physics and Materials Science of SB RAS, Tomsk 634055, Russia
Nikita A. Luginin
Laboratory of Physics of Nanostructured Biocomposites, Institute of Strength Physics and Materials Science of SB RAS, Tomsk 634055, Russia
Yurii P. Sharkeev
Laboratory of Physics of Nanostructured Biocomposites, Institute of Strength Physics and Materials Science of SB RAS, Tomsk 634055, Russia
Margarita A. Khimich
Laboratory of Nanobioengineering, Institute of Strength Physics and Materials Science of SB RAS, Tomsk 634055, Russia
Olga V. Kazmina
Research School of Advanced Manufacturing Technologies, Kizhner Research Center, National Research Tomsk Polytechnic University, Lenin Prospect 30, Tomsk 634050, Russia
Edgar S. Dvilis
Research School of Advanced Manufacturing Technologies, Innovation Center for Nanomaterials and Nanotechnologies, National Research Tomsk Polytechnic University, Lenin Prospect 30, Tomsk 634050, Russia
Konstantin V. Ivanov
Laboratory of Physics of Consolidated Powder Materials, Institute of Strength Physics and Materials Science of SB RAS, Tomsk 634055, Russia
The present study showcases a novel effective technique for the surface modification of micro-arc diatomite coatings using low-energy, high-current electron beams (LEHCEBs). A variety of methods such as scanning electron microscopy, energy-dispersive X-ray spectroscopy, the X-ray diffraction method, scratch testing, the potentiodynamic polarization method, immersion testing in SBF, and flow cytometry have been used to study the coatings. During processing, the electron beams’ energy density ranged between 2.5–7.5 J/cm2. After the LEHCEB treatment, the surface morphology of the coatings changed completely. The corrosion resistance of the LEHCEB-treated coated samples increased significantly, as evidenced by the decrease in corrosion current to 4.6 × 10−10 A·cm−2 and the increase in polarization resistance to 1.4 × 108 Ω·cm2. The electron beam treatment also increased the adhesion strength of the coatings to the magnesium substrate by 1.8–2.5 times compared to untreated coatings. Additionally, biological studies have shown the high viability of the NIH/3T3 cell line after contact with the samples of the coating extracts.
