Recurrence analysis of coefficient of friction oscillations in DLC-coated and non-coated Ti6Al4V titanium alloy

Łępicka, Magdalena; Grądzka-Dahlke, M.; Zaborowska, Iwona; Górski, Grzegorz; Mosdorf, Romuald

doi:10.1016/j.triboint.2021.107342

Cited by 5 publications

(4 citation statements)

References 38 publications

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“…10. The coefficient of friction shows small variations both before and after implantation, which has also been observed in other studies [28,29]. In these studies, the variations were analysed by means of the Self-Organizing Neural Network algorithm.…”

Section: Implantation and Irradiation Of Ti6al4v Alloysupporting

confidence: 70%

Effect of Carbon Ion Implantation and Xenon Ion Irradiation on the Tribological Properties of Titanium and Ti6Al4V Alloy

et al. 2022

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Carbon implantation increases the coefficient of friction and wear for titanium, as well as eliminates oscillating changes in the coefficient of friction for titanium at a depth 25 times greater than the range of the implanted ions. Carbon implantation changes the characteristics of wear, namely the steel counter sample sticks to the surface layer of the titanium sample, and fragments of the sample are torn out during friction. Although the adhesive wear mechanism is dominant, abrasive and oxidative wear can also be observed. The application of additional xenon ion irradiation does not cause any significant changes in the wear characteristics. Implantation of the Ti6Al4V alloy with carbon ions reduces its coefficient of friction. This effect is opposite to that observed for technically pure titanium. Optimum tribological properties are obtained for the Ti6Al4V alloy, implanted with carbon ions with a fluence of 1 × 10 17 C + /cm 2 . The different effects of carbon ion implantation and xenon ion irradiation on titanium and Ti6Al4V alloy result from differences between the energy distribution in the samples and the lack of chemical interactions of xenon atoms. The high energy deposited on the sample surface during the inelastic collision (Se) with the target electrons induces significant changes in the surface topography of both metals. This also explains why the diamond-like carbon layer, which is formed as a result of carbon ion implantation, is removed after being irradiated with xenon ions.

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Section: Implantation and Irradiation Of Ti6al4v Alloysupporting

confidence: 70%

Effect of Carbon Ion Implantation and Xenon Ion Irradiation on the Tribological Properties of Titanium and Ti6Al4V Alloy

et al. 2022

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“…9 Diamond-like carbon (DLC) films, with excellent wear resistance, good mechanical properties, haemocompatibility, and biocompatibility, [10][11][12] can be desirable for surface modification of Ti6Al4V used for VADs manufacturing. Łępicka et al 13 analyzed the coefficient of friction time series of non-coated and DLC-coated Ti6Al4V acquired during tribological tests, and confirmed that the DLC films could reduce wear of Ti6Al4V alloys. Besides, certain experimental results also proved that DLC films could effectively enhance the wear performance of Ti6Al4V alloys.…”

Section: Introductionmentioning

confidence: 91%

Diamond‐like carbon films prepared by a low temperature periodic process for application in ventricular assist devices

et al. 2022

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Due to the poor tribological properties of titanium (Ti) and its alloy Ti6Al4V (commonly used for ventricular assist devices manufacturing), diamond‐like carbon (DLC) films with excellent anti‐wear properties are pursued to improve the wear resistance of Ti and its alloys. Considering the effect of temperature on magnets inside pump impellers and workpiece deformation, DLC films are preferred to be prepared under low temperature. In this study, DLC films were prepared on Ti6Al4V alloys by periodic and continuous processes, and the corresponding maximum deposition temperature was 85 and 154°C, respectively. The periodic DLC films exhibited the feature of columnar structure, and the surface hillocks were less uniform than that of continuous DLC films. The periodic DLC films possessed more sp3‐bonded structures, and the accessorial sp3‐bonding mainly existed in the form of CH. Compared to continuous DLC films, the periodic DLC films had lower residual stress and better adhesion with Ti6Al4V substrates. Both DLC films could effectively reduce the friction coefficient and wear rate of Ti6Al4V alloys both in air and fetal bovine serum (FBS), and the periodic DLC films exhibited superior anti‐wear properties to that of continuous DLC films in FBS. Haemocompatibility evaluation revealed that both DLC films presented similar levels of more human platelet adhesion and activation as compared with that of bare Ti6Al4V. However, both DLC films significantly prolonged plasma clotting time in comparison to bare Ti6Al4V. This study demonstrates the potential of low‐temperature DLC films as wear‐resistant surface modification for VADs.

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“…They concluded that the material loss caused by tribocorrosion is not the sum of superficial, pure corrosion, and pure wear loss, and the synergistic effect between tribocorrosion accounts for a large proportion of the total volume loss. Zhang et al [248] introduced a metal Zr layer into the ZrN coating Diamond-like carbon (DLC) coatings are known to be excellent candidates for using as protective coatings on biomedical alloys, not only due to their excellent tribological properties but also due to their chemical composition and stability [249][250][251][252][253][254]. Hinüber et al [255] fabricated a ta-C DLC on Ti6Al4V alloy, which presented a good adhesion strength, together with reduced tribocorrosion rate in PBS solution and excellent in vitro biocompatibility.…”

Section: Physical Vapor Depositionmentioning

confidence: 99%

“…However, the life of DLC films was reduced two to ten times in the tribocorrosion tests by the simultaneous action of tribocorrosion mechanisms. Diamond-like carbon (DLC) coatings are known to be excellent candidates for using as protective coatings on biomedical alloys, not only due to their excellent tribological properties but also due to their chemical composition and stability [249][250][251][252][253][254]. Hinüber et al [255] fabricated a ta-C DLC on Ti6Al4V alloy, which presented a good adhesion strength, together with reduced tribocorrosion rate in PBS solution and excellent in vitro biocompatibility.…”

Section: Physical Vapor Depositionmentioning

confidence: 99%

Tribocorrosion and Surface Protection Technology of Titanium Alloys: A Review

Li,

Zhou,

2023

Materials

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Titanium alloy has the advantages of high specific strength, good corrosion resistance, and biocompatibility and is widely used in marine equipment, biomedicine, aerospace, and other fields. However, the application of titanium alloy in special working conditions shows some shortcomings, such as low hardness and poor wear resistance, which seriously affect the long life and safe and reliable service of the structural parts. Tribocorrosion has been one of the research hotspots in the field of tribology in recent years, and it is one of the essential factors affecting the application of passivated metal in corrosive environments. In this work, the characteristics of the marine and human environments and their critical tribological problems are analyzed, and the research connotation of tribocorrosion of titanium alloy is expounded. The research status of surface protection technology for titanium alloy in marine and biological environments is reviewed, and the development direction and trends in surface engineering of titanium alloy are prospected.

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Recurrence analysis of coefficient of friction oscillations in DLC-coated and non-coated Ti6Al4V titanium alloy

Cited by 5 publications

References 38 publications

Effect of Carbon Ion Implantation and Xenon Ion Irradiation on the Tribological Properties of Titanium and Ti6Al4V Alloy

Effect of Carbon Ion Implantation and Xenon Ion Irradiation on the Tribological Properties of Titanium and Ti6Al4V Alloy

Diamond‐like carbon films prepared by a low temperature periodic process for application in ventricular assist devices

Tribocorrosion and Surface Protection Technology of Titanium Alloys: A Review

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