Wear Mechanism of Superhard Tetrahedral Amorphous Carbon (ta-C) Coatings for Biomedical Applications

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dc.article.number2202370
dc.catalogadorjca
dc.contributor.authorRothammer, Benedict
dc.contributor.authorSchwendner, Michael
dc.contributor.authorBartz, Marcel
dc.contributor.authorWartzack, Sandro
dc.contributor.authorBoehm, Thomas
dc.contributor.authorKrauss, Sebastian
dc.contributor.authorMerle, Benoit
dc.contributor.authorSchroeder, Stefan
dc.contributor.authorUhler, Maximilian
dc.contributor.authorKretzer, Jan Philippe
dc.contributor.authorWeihnacht, Volker
dc.contributor.authorMarian, Max
dc.date.accessioned2024-06-06T14:28:10Z
dc.date.available2024-06-06T14:28:10Z
dc.date.issued2023
dc.description.abstractTetrahedral 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.
dc.fechaingreso.objetodigital2024-09-10
dc.fuente.origenORCID
dc.identifier.doi10.1002/ADMI.202202370
dc.identifier.issn2196-7350
dc.identifier.urihttps://doi.org/10.1002/ADMI.202202370
dc.identifier.urihttps://publons.com/wos-op/publon/56474011/
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/86513
dc.identifier.wosidWOS:000916725400001
dc.information.autorucEscuela de Ingeniería; Marian , Max; 0000-0003-2045-6649; 1247429
dc.issue.numero7
dc.language.isoen
dc.nota.accesoContenido completo
dc.pagina.final17
dc.pagina.inicio1
dc.revistaAdvanced Materials Interfaces
dc.rightsacceso abierto
dc.subject.ddc620
dc.subject.deweyIngenieríaes_ES
dc.subject.ods09 Industry, innovation and infrastructure
dc.subject.odspa09 Industria, innovación e infraestructura
dc.titleWear Mechanism of Superhard Tetrahedral Amorphous Carbon (ta-C) Coatings for Biomedical Applications
dc.typeartículo
dc.volumen10
sipa.codpersvinculados1247429
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