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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Weihnacht, Volker
Fraunhofer Society
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2024Surface depassivation via B-O dative bonds affects the friction performance of B-doped carbon coatings
- 2023Wear Mechanism of Superhard Tetrahedral Amorphous Carbon (ta‐C) Coatings for Biomedical Applicationscitations
- 2023High Performance of Liquid‐Gated Silicon Nanowire FETs Covered with Ultrathin Layers of Diamond‐Like Tetrahedral Amorphous Carboncitations
- 2022Comparison of fracture properties of different amorphous carbon coatings using the scratch test and indentation failure methodcitations
- 2022Mechanism of superlubricity of a DLC/Si3N4 contact in the presence of castor oil and other green lubricantscitations
- 2022Mechanism of superlubricity of a DLC/Si3N4 contact in the presence of castor oil and other green lubricantscitations
- 2022Amorphous Carbon Coatings with Different Metal and Nonmetal Dopants: Influence of Cathode Modification on Laser-Arc Evaporation and Film Depositioncitations
- 2022Effect of doping elements to hydrogen-free amorphous carbon coatings on structure and mechanical properties with special focus on crack resistancecitations
- 2021Indentation modulus extrapolation and thickness estimation of ta-C coatings from nanoindentationcitations
- 2021The role of lubricant and carbon surface in achieving ultra- and superlow frictioncitations
- 2021Generalized approach of scratch adhesion testing and failure classification for hard coatings using the concept of relative area of delamination and properly scaled indenterscitations
- 2021Effect of Energy and Temperature on Tetrahedral Amorphous Carbon Coatings Deposited by Filtered Laser-Arccitations
- 2019Mechano-chemical decomposition of organic friction modifiers with multiple reactive centres induces superlubricity of ta-Ccitations
- 2017Tribochemical induced wear and ultra-low friction of superhard ta-C coatingscitations
- 2016Scratch resistance of superhard carbon coatings - a new approach to failure and adhesion evaluationcitations
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article
Wear Mechanism of Superhard Tetrahedral Amorphous Carbon (ta‐C) Coatings for Biomedical Applications
Abstract
Tetrahedral amorphous carbon (ta-C) coatings have the potential to protect biomedical implants from wear and increase their service life. This study elucidates the biocompatibility, mechanical properties, adhesion, and wear resistance of ta-C coatings fabricated by physical vapor deposition on cobalt-chromium-molybdenum (CoCr) and titanium (Ti64) alloys as well as ultrahigh molecular weight polyethylene (UHMWPE). Satisfactory cytocompatibility is verified using contact angle and surface tension measurements as well as indirect and direct cell testing. Scratch testing demonstrates excellent adhesion to the substrates and as confirmed by nanoindentation, the coatings represent an up to 13-fold and 182-fold increase in hardness on the hard and soft materials. In metal pin-on-UHMWPE disk sliding experiments under simulated body fluid lubrication, the wear rates of the disk are reduced by 48% (against CoCr) and 73% (against Ti64) while the pin wear rates are reduced by factors of 20 (CoCr) and 116 (Ti64) compared to uncoated pairings. From optical and laser scanning microscopy, Raman measurements, and particle analyses, it is shown that the underlying substrates remain well protected. Nonetheless, focused ion beam scanning electron microscopy revealed coating process-related and thermally driven subductions as well as tribologically induced near-surface fatigue, which can potentially constitute critical wear mechanisms. ; 10 ; 7