Enhancing adhesion strength of a-C:H:Cu composite coatings on Ti6Al4V by graded copper deposition in a rf-PVD/PECVD hybrid process

Nißen, Stefan; Heeg, Jan; Wienecke, M.; Behrend, D.; Warkentin, Mareike

doi:10.1016/j.surfcoat.2018.07.023

Cited by 13 publications

(4 citation statements)

References 65 publications

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“…This can been related to the increase in the size of Cu clusters in the a-C:H matrix. It can be noted that the particle diameter on the surface, measured with AFM, ranged between 100 and 400 nm ( Figure 4), while scanning TEM (STEM) examinations in previous work [73] showed Cu particle size of 1.5-22 nm. The relative height values of the surface topography, ~30-40 nm, also indicated that the particles on the surface were not spherical.…”

Section: Surface Topographymentioning

confidence: 81%

“…Coated cylindrical titanium alloy Ti6Al4V specimens (Ti grade 23 ELI, Ø = 11 mm) with a thickness of 2 mm were used for the release measurements ( Figure 1a). Here only a short summary of the deposition steps is given, as the detailed deposition processes are already described in another paper [73]. The whole process consisted of three deposition steps (Figure 1b).…”

Section: Deposition Methodsmentioning

confidence: 99%

“…When reaching the a-C:H:Cu layer, the copper content showed a chemical gradient that was a result of the gradient copper deposition process which was used to enhance the adhesion of the a-C:H:Cu to the a-C:H layer. Further information regarding the graded copper deposition is summarized in a further paper [73]. Following that procedure, the copper was homogeneously distributed in the a-C:H:Cu coatings over coating depth.…”

Section: Gdoes Depth Profilesmentioning

confidence: 99%

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Surface Characterization and Copper Release of a-C:H:Cu Coatings for Medical Applications

et al. 2019

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This paper focuses on the surface properties of a-C:H:Cu composite coatings for medical devices and how the release of Cu2+ ions from such coatings can be controlled. The released Cu ions have the potential to act as a bactericidal agent and inhibit bacterial colonization. A PVD–PECVD hybrid process was used to deposit a-C:H:Cu composite coatings onto Ti6Al4V substrates. We examine the layer surface properties using atomic force microscopy and static contact angle measurements. An increasing surface roughness and increasing contact angle of Ringer’s solution was measured with increasing copper mole fraction (XCu) in the coatings. The contact angle decreased when a supplementary bias voltage of −50 V was used during the a-C:H:Cu deposition. These findings are in line with earlier published results regarding these types of coatings. The release of Cu2+ ions from a-C:H:Cu coatings in Ringer’s solution was measured by anodic stripping voltammetry. Different layer structures were examined to control the time-resolved Cu release. It was found that the Cu release depends on the overall XCu in the a-C:H:Cu coatings and that an additional a-C:H barrier layer on top of the a-C:H:Cu layer effectively delays the release of Cu ions.

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Section: Surface Topographymentioning

confidence: 81%

Section: Deposition Methodsmentioning

confidence: 99%

Section: Gdoes Depth Profilesmentioning

confidence: 99%

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Surface Characterization and Copper Release of a-C:H:Cu Coatings for Medical Applications

et al. 2019

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“…Among the techniques for the production of coatings, sputtering is considered a very versatile and green methodology. Specifically, in the area of tribology, the deposition of diamond-like coatings (DLC) [24][25][26] and doped amorphous carbon coatings (d-aC) [27][28][29] are widely reported. However, the properties of DLC, particularly the mechanical ones, are not compatible with softer substrates such as copper.…”

Section: Introductionmentioning

confidence: 99%

Influence of Carbyne Content on the Mechanical Performance of Nanothick Amorphous Carbon Coatings

Piedade

Cangueiro

2020

Nanomaterials

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This study concerns the evaluation of the coefficient of friction, at different temperatures, of amorphous carbon thin films, deposited onto nanocrystalline sputtered copper coatings by clean-technology rf magnetron sputtering. The aim is to access the capacity of carbon thin films, with different contents of sp2 and sp1 bonds, to act as a solid lubricant for copper surfaces. Raman spectroscopy revealed that all the as-deposited coatings consist of amorphous carbon with low defect content and decreasing carbyne concentration with increasing thickness. The tribological tests at 25 °C and 200 °C revealed that, for the higher temperature, the 15 nm carbon coating present 0.001 friction coefficients at 2 N load. Overall, the study presents a one-step technology for the greener production of solid lubrication systems for micro- and nano-components, avoiding the environmental impact of lubricants.

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A review of carbon-based materials and their coating techniques for biomedical implants applications

et al. 2023

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Enhancing adhesion strength of a-C:H:Cu composite coatings on Ti6Al4V by graded copper deposition in a rf-PVD/PECVD hybrid process

Cited by 13 publications

References 65 publications

Surface Characterization and Copper Release of a-C:H:Cu Coatings for Medical Applications

Surface Characterization and Copper Release of a-C:H:Cu Coatings for Medical Applications

Influence of Carbyne Content on the Mechanical Performance of Nanothick Amorphous Carbon Coatings

A review of carbon-based materials and their coating techniques for biomedical implants applications

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