On the electro-tribological properties and degradation resistance of silver-aluminum coatings

Braceras, I.; Ibáñez, Iñigo; Taher, Mamoun; Mao, Fang; Barrio, Andrés del; Urturi, Saioa Saenz De; Berastegui, P.; Andersson, Anna; Jansson, Ulf

doi:10.1016/j.wear.2018.08.014

Cited by 10 publications

(4 citation statements)

References 19 publications

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“…Details of the equipment and test set up have been described elsewhere. [23,24] Medical devices related tribological conditions can vary enormously, specially concerning speed. In this case, the speed was selected as an approximation to the low average range of reamer speeds.…”

Section: Methodsmentioning

confidence: 99%

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TiN-Ag as an antimicrobial and wear resistant coating

et al. 2021

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Nosocomial infections are a major clinical concern, posing great risks for patients and rising costs for health services providers. This work aims at developing a hard, wear resistant coating, whose antimicrobial properties shall prevent the transmission of infections.TiN coatings deposited by Physical Vapour Deposition, PVD, with different Ag contents have been studied, especially in relation to the hardness and adhesion, their microstructure and morphology. The antimicrobial activity of the surfaces has been assessed against Staphylococcus epidermidis at different time frames, one of the most troublesome source of infections in trauma and orthopaedic surgeries. The electro-tribology properties of different silver contest have been studied. Finally, the coatings have been deposited on surgical acetabular reamers and wear resistance tests have been carried out against synthetic composite bone (simulating cortical and cancellous bone).Results have shown a good coating adhesion on stainless steel (both quantitatively in the scratch tests and qualitatively in the tests against synthetic composite bone), while the hardness decreased with higher Ag percentages. Furthermore, coatings exhibited antimicrobial activity against S.epidermidis, limited silver release, a remarkable wear resistance (vs. uncoated surgical acetabular reamers), while the electrical contact resistance provided valuable information about the evolution of friction and the status of the coating. Therefore TiN-Ag coatings present promising features for reducing the risk of infections, monitoring and extending cutting edge life and quality, and thus limiting damage to living tissues, e.g. necrosis.

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Section: Methodsmentioning

confidence: 99%

“…4), which is expected in alloys with high silver contents, which present lower residual stresses. [15,23]…”

Section: Coating Composition Hardness Thickness and Adhesionmentioning

confidence: 99%

TiN-Ag as an antimicrobial and wear resistant coating

et al. 2021

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“…Electro-tribology tests of aluminum against DLC coatings were performed on a pin-on-disk (PoD) configuration, in controlled humidity environments, with a Microtest MT4002 tribometer (Microtest S.A.), where the evolution of the Coefficient of friction (CoF) and electrical contact resistance (ECR) were continuously monitored [29,39]. The ECR measurements were done by "4 wire" micro-ohmeter (Keithley K2100).…”

Section: Methodsmentioning

confidence: 99%

“…[33] This paper details the electro tribological studies performed on DLC dielectric coatings deposited on copper, focusing on the evolution of the electrical contact resistance characteristics and their tribological properties, as well as the coating degradation mechanisms. Aluminum is the selected counterpart, as one of the most used material in electric and electronic applications together with copper, is inexpensive and because typically presents a challenging tribology behavior [3,29]. Additionally, the use of electro tribological data as a monitoring tool of the coating operative life is explored.…”

Section: Introductionmentioning

confidence: 99%

Electro-tribological properties of diamond like carbon coatings

et al. 2019

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Diamond like carbon (DLC) coatings typically present good self-lubricating tribological properties that could be of interest in sliding dielectric contacts in multiple electrical applications. In this work electro-tribological studies have been performed on several DLC coatings against aluminum in different humidity conditions, in which the coefficients of friction (CoFs) and electrical contact resistance (ECR) were continuously monitored. Results show that CoF and ECR data can be linked to the properties of the coatings (thickness, finishing, microstructure, residual stresses, and wettability) and the degradation modes of their tribological and electrical properties. Therefore, electro-tribological data can provide valuable information about the performance of dielectric coatings, the reasons behind it, and assist in the development of the coatings. ECR also shows potential for on-line monitoring of coated parts in operation.

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