Abstract
For the enhancement of the anticorrosion and antibacterial performance of the biomedical alloy Ti6Al4V, a novel Cu incorporated multilayer Ta2O5ceramic composite coating Cu-Ta2O5/Ta2O5/Ta2O5-TiO2/TiO2/Ti (coating codeCu-MTa2O5) was developed by radio frequency (RF) and direct current (DC) reactive magnetron sputtering. Meanwhile, to better display the multilayer Ta2O5 coating mentioned above, a monolayer Ta2O5 ceramic coating was deposited onto the surface of Ti6Al4V alloy as a reference. The surface morphology, microstructure, phase constituents, and elemental states of the coating were evaluated by atomic force microscopy, scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy, respectively. The adhesion strength, wettability, anticorrosion and antibacterial properties of the coating were examined by a scratch tester, contact angle measurement, electrochemical workstations, and plate counting method, respectively. The results showed that the deposited coatings were amorphous and hydrophobic. Cu doped into the Ta2O5 coating existed as CuO and Cu2O. A Ta2O5-TiO2/TiO2/Ti multi-interlayer massively enhanced the adhesion strength of the coating, which was 2.9 times stronger than that of the monolayer Ta2O5coating. The multilayer Cu-MTa2O5 coating revealed a higher corrosion potential and smaller corrosion current density as compared to the uncoated Ti6Al4V, indicating the better anticorrosion performance of Ti6Al4V. Moreover, a 99.8% antibacterial effect of Cu-MTa2O5 coated against Staphylococcus aureuswas obtained.
Highlights
Ti6Al4V titanium alloy, as a medical implant material, has been commonly applied in dentistry, orthopedics, and other fields due to its excellent corrosion resistance, mechanical properties, and biocompatibility [1,2,3,4]
Results indicated that the coated Ti6Al4V alloy showed higher corrosion potential and lower corrosion current density, and remarkably enhanced the adhesion and proliferation activity of mouse embryonic fibroblasts compared to an uncoated Ti6Al4V alloy
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Summary
Ti6Al4V titanium alloy, as a medical implant material, has been commonly applied in dentistry, orthopedics, and other fields due to its excellent corrosion resistance, mechanical properties, and biocompatibility [1,2,3,4]. Has a monolayer of Ti [32], TiO2 [33], ZrO2 [34], SiC [35], or TiN [36] been added as an intermediate layer between bioactive ceramic and Ti6Al4V alloy, and bilayers such as TiN/TiO2 [37], ZrN/Zr [38], and TiN/Ti [39] have been used as the intermediate layer These intermediate layers improve the bonding strength of the ceramic coating to the Ti6Al4V alloy substrate, and enhance the mechanical properties, wear resistance, and corrosion resistance of the coated Ti6Al4V. Tspheecwtroetstcaobpilyit(yX, PboS)n.dTihneg wsterettnagbtihli,tyco, brroonsdioinngresstrisetnagntche,, caonrdroasniotinbarcetseirsitaalnpcreo, paenrdtyaonftitbhaectceoraiatilnpgrwopeerertydeotef rtmheinceodatbinyga wcoenretadcteatenrgmleinmedeabsuyraincgoinntsatcrtuamnegnlet, msceraatscuhritnegsteirn, setlreucmtroecnht,emscircaatlcwh otreksstteart,ioenle, catnrodcphleamteiccaolunwtionrgksmtaettihoond, ,arnedspepcltaitveelcyo. uFnotrincogmmpeatrhisoodn,, rstthheasmiespspeestcliuetnisdvv.yeeTlsayhtr.ieegFfaeoitxnripodcneioncsmtgewspdeafrtrrooeismpaolrnsot,ohvtihpisdeesesrtefuaoidrvnmyavleeausdrateiboglenaextprmioeefnocesntreeowdnlaectyreoeefpraorlTrsoatovh2iOpede5serufcaorofrvaamatcileneudgmabosolandemimrfipecoflaenetrsoie.olnanTcyheoeefrfotfiTirtnaatd2nOhiienu gcmssouarfafrtlaiolnocmgey mimopdliafnictamtioanteorifatlist.anium alloy implant materials
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