Effect of substrate bias on biocompatibility of amorphous carbon coatings deposited on Ti6Al4V by PECVD

Cho, Yun-Shao; Liao, Li-Kai; Hsu, Chia-Hsun; Hsu, Yu-Hsuan; Wu, Wan-Yu; Liao, Shu-Chuan; Chen, Kun-Hui; Lui, Ping-Wing; Zhang, Sam; Lien, Shui−Yang

doi:10.1016/j.surfcoat.2018.09.070

Cited by 21 publications

(7 citation statements)

References 23 publications

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“…Generally, the surface modification approaches of titanium alloy include using different texturing or coatings to enhance wear resistance and reduce friction, since textures created on the surfaces can reduce the interactions between two mating surfaces and also operate as reservoirs to provide lubricant favoring low friction and coatings can provide a hard protective layer on the metal surface to decrease wear. Coating materials such as DLC (diamond-like carbon), Al 2O3, CrN, AlCrN, TiO2/TiN, et al are reported to be effective in the improvement of tribological properties (Cho et al, 2019;Balcaen et al, 2011;Chen et al, 2020;Aissa and Khlifi, 2021). For the LST (Laser surface texturing), the effects of patterning characteristics such as shape, size and density on friction are also investigated to decrease wear or show better wettability (Salguero et al, 2019;Pratap and Patra, 2020;Kawasegi et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Surface modification technique of titanium alloy to improve the tribological properties using sub-ns laser irradiation in PAO oil

LIU

TANAKA

Fujiwara

et al. 2023

JAMDSM

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Titanium alloy is widely used in different industrial applications. For the surface modification to improve the tribological properties, laser irradiation is a promising technology, which offers high efficiency, and high automation potential and geometrical flexibility. In this study, a novel method of surface modification for titanium alloys by carbonization using low fluence of laser irradiation in the atmosphere of PAO oil is proposed. Results show that the carbon content on the surfaces significantly increases with the laser shot number, with the laser irradiated spot showing little change of Ra. XPS analysis confirms that the carbon from the oil has bonded to the Titanium inside the alloy. By comparison with that irradiated without oil, the hardness of that irradiated in oil is much higher, demonstrating the feasibility of the surface modification of titanium carbide layer generation. To investigate the tribological properties, laser scanning irradiation in oil with different laser pulses were carried out to create laser modified areas and reciprocating ball-on-disk friction tests under oil lubrication were conducted. The laser modified areas show friction of 0.13, much lower than that of the unirradiated which is approximate 0.55, and the sliding lifetime of low friction is also increased with the laser pulse number. Moreover, by introducing patterning laser irradiation onto the uniformly irradiated area, the wear resistance can be further greatly improved, and the sliding lifetime can extend to 13 times of the optimal result of uniform irradiation.

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Section: Introductionmentioning

confidence: 99%

Surface modification technique of titanium alloy to improve the tribological properties using sub-ns laser irradiation in PAO oil

LIU

TANAKA

Fujiwara

et al. 2023

JAMDSM

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“…These properties can cause a reduction in the implant service life [ 30 ]. Therefore, to overcome the drawbacks, different surface coating methods have been trialled including sol-gel [ 31 ], plasma spraying [ 32 ], biomimetic coating [ 18 ], gel oxidation [ 33 ], chemical vapour deposition [ 34 ], and anodic oxidation [ 35 ]. These methods have produced coatings with excellent physicochemical and mechanical properties and importantly created a bioactive surface on titanium substrates.…”

Section: Introductionmentioning

confidence: 99%

Evolution of anodised titanium for implant applications

Alipal

Lee

Koshy

et al. 2021

Heliyon

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Anodised titanium has a long history as a coating structure for implants due to its bioactive and ossified surface, which promotes rapid bone integration. In response to the growing literature on anodised titanium, this article is the first to revisit the evolution of anodised titanium as an implant coating. The review reports the process and mechanisms for the engineering of distinctive anodised titanium structures, the significant factors influencing the mechanisms of its formation, bioactivity, as well as recent pre-and post-surface treatments proposed to improve the performance of anodised titanium. The review then broadens the discussion to include future functional trends of anodised titanium, ranging from the provision of higher surface energy interactions in the design of biocomposite coatings (template stencil interface for mechanical interlock) to techniques for measuring the boneto-implant contact (BIC), each with their own challenges. Overall, this paper provides up-to-date information on the impacts of the structure and function of anodised titanium as an implant coating in vitro and in/ex vivo tests, as well as the four key future challenges that are important for its clinical translations, namely (i) techniques to enhance the mechanical stability and (ii) testing techniques to measure the mechanical stability of anodised titanium, (iii) real-time/in-situ detection methods for surface reactions, and (iv) cost-effectiveness for anodised titanium and its safety as a bone implant coating.

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“…This can cause cytotoxicity, allergic or implant rejection reactions, painful inflammation or infection of the surrounding tissues, and can lead to the development of tumors and cancer cells. The risk of implant relaxation, fracture, disintegration, and premature wear also remains relevant [2,3,[6][7][8]. As a result, the non-metallotic polymeric implants have been increasingly used in recent years.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, temperature-sensitive materials can be coated by this method. On the other hand, the reactive particles required for the growth of the coating are generated not by high temperature, but by plasma -glowing discharge, therefore DLC coating grown at low temperatures has good tribological properties [3,5,8,12,13]. The hydrocarbon gases are usually used as carbon and hydrogen sources in the deposition of films by this method: methane, acetylene, ethylene and benzene gases are the most common.…”

Section: Introductionmentioning

confidence: 99%

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Formation of diamond like carbon films on materials for medical application

Rutkūnienė

Balandyte

Karbauskyte

2021

phst

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The aim of this experimental work is to identify how the surfaces of materials that are most often used in medical implants and prostheses, affect the properties of the deposited amorphous carbon films. The DLC films were formed on the stainless steel, aluminium, polyetheretherketone (PEEK) and polycaprolactone (PCL) surfaces by PECVD method using C 2 H 2 gas plasma and their properties was compared with the films deposited on silicon. The differences of the films properties were determined by a null-ellipsometry and Raman spectroscopy. It was found that the thicknesses of the carbon coatings deposited on metallic substrates are larger than on the silicon when the deposition conditions were the same. When the films are formed at high bias voltage the refractive index of the DLC films deposited on stainless steel are lower compared to the coatings on silicon but the extinction coefficients are higher. Raman spectra shows that sp 2 bonds concentration is higher in this case. When the ion energy is lowest (bias voltage -400 V), Raman spectroscopy shows that D peak isn't observed on the Si-deposited carbon coating, while the typical carbon amorphous coating is formed on the Al substrate. The thickness of amorphous carbon coatings deposited on the polymers depends on the bias voltage, and the optical properties depend on the type of polymer. The coatings deposited on PCL have a much higher refractive index than on PEEK.

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Effect of substrate bias on biocompatibility of amorphous carbon coatings deposited on Ti6Al4V by PECVD

Cited by 21 publications

References 23 publications

Surface modification technique of titanium alloy to improve the tribological properties using sub-ns laser irradiation in PAO oil

Surface modification technique of titanium alloy to improve the tribological properties using sub-ns laser irradiation in PAO oil

Evolution of anodised titanium for implant applications

Formation of diamond like carbon films on materials for medical application

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