Deposition of wear resistant coatings based on diamond like carbon by unbalanced magnetron sputtering

Monaghan, D.; Teer, D. G.; Logan, Paul; Efeoğlu, İhsan; Arnell, R.D.

doi:10.1016/0257-8972(93)90146-f

Cited by 175 publications

(42 citation statements)

References 8 publications

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“…4,5 For the deposition of adherent DLC onto titanium, one of the more promising approaches involves TiN and TiC interlayers, to give a Ti-TiN-TiC-DLC multilayer structure. 6,7 The deposition of DLC, on a wide range of substrate materials, has received considerable attention in the literature. Favorable results have been reported for applications such as surgical needles for corneal surgery, 8 materials for total joint replacement, 3,9 orthopedic pins and screws, 10 dental prostheses, 11 medical guidewires, 12 heart valve replacements, 13 and rotary pumps for left ventricular assistance.…”

Section: Introductionmentioning

confidence: 99%

Protein adsorption and platelet attachment and activation, on TiN, TiC, and DLC coatings on titanium for cardiovascular applications

Jones

McColl

Grant

et al. 2000

J. Biomed. Mater. Res.

284

151

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The hemocompatibility of a TiN/TiC/diamond-like carbon (DLC) multilayer structure, deposited on titanium substrates for use as coatings for a heart valve prosthesis, has been studied through the adsorption of blood proteins and the adhesion and attachment of blood platelets. All of the surfaces were characterized by stylus profilometry and water contact angles. The adsorption of albumin and fibrinogen to the surfaces was assessed using the Amido Black assay, whereas platelet attachment was studied by scanning electron microscopy and quantified using stereological techniques. The degree of platelet spreading on the surfaces was seen to correlate with differences in surface energy, indicated from contact angle measurements. The greatest spreading was seen on the more hydrophilic surfaces. When studying protein adsorption to the surfaces, no correlation could be determined between contact angle results and levels of adsorption, although the most hydrophilic surfaces did appear to promote greater amounts of fibrinogen adsorption. Thrombus formation was observed to some degree on all of the surfaces, with the exception of the DLC coating. This coating also promoted less spreading of platelets than the other surfaces. The good hemocompatibility of the DLC coating is attributed to its hydrophobicity and smooth surface, resulting in a higher ratio of albumin to fibrinogen than any of the other surfaces.

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Section: Introductionmentioning

confidence: 99%

Protein adsorption and platelet attachment and activation, on TiN, TiC, and DLC coatings on titanium for cardiovascular applications

Jones

McColl

Grant

et al. 2000

J. Biomed. Mater. Res.

284

151

View full text Add to dashboard Cite

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“…1 as a function of negative substrate bias. The N content decreases from about 22.96 to 20.62 at% while the C + Ru and Pt contents increase from about 76.62 to 78.70 at% and from about 0.42 to 0.68 at%, respectively, with increased negative substrate bias from 0 to -120 V. Since the kinetic energy of sputtered ions is proportional to substrate bias, the increased negative substrate bias accelerates the sputtered ions onto the film surfaces resulting in the proportionally increased C + Ru and Pt contents in the PtRuN-DLC films [24][25][26][27][28]. Compared to the ionization rate of N 2 gas inside the deposition chamber, the increased kinetic energies of the C, Pt and Ru ions with increased negative substrate bias reduce the N content in the PtRuN-DLC films.…”

Section: Resultsmentioning

confidence: 98%

Tribological properties of platinum/ruthenium/nitrogen doped diamond-like carbon thin films deposited with different negative substrate biases

Khun

Liu

2014

Friction

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Abstract:The platinum/ruthenium/nitrogen doped diamond-like carbon (PtRuN-DLC) thin films were deposited on Si substrates via DC magnetron sputtering by varying negative substrate bias. The tribological performance of the PtRuN-DLC films was systematically investigated using ball-on-disc microtribological test. The Raman results showed that the increased negative substrate bias significantly increased the number of sp 3 bonds in the PtRuN-DLC films as a result of the increased kinetic energies of impinging ions. The adhesion strength of the PtRuN-DLC films apparently decreased with increased negative substrate bias due to the promoted residual stress in the films. The tribological results clearly revealed that the increased negative substrate bias decreased the friction and wear of the PtRuN-DLC films by improving the sp 3 bonded cross-linking structures of the films. It can be concluded that the PtRuN-DLC films could effectively prevent their underlying Si substrates from wear as the negative substrate bias had a significant influence on the tribological properties of the PtRuN-DLC films.

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“…These fluctuations are due to the constant breakage and re-forming of the passive oxide layer on the surface. The ratio of worn and unworn areas, in particular, if the extent of the worn area increases, the OCP of the samples will shift depending on the controlling electrochemical processes, being either anodic (e.g., the dissolution of the metal) or the cathodic reaction (e.g., the reduction of hydrogen or dissolved oxygen) [32]. On the other hand, the OCP values of the coated sample exhibited more noble values than the uncoated samples.…”

Section: Results Of Tribo-corrosion Testmentioning

confidence: 99%

“…The use of MAO has been increasing day by day to improve wear resistance, corrosion resistance, and load carrying capacity of the Titanium surface and its alloys [32][33][34][35]. A ceramic oxide layer, which is relatively thick (approximately 150 lm), hard, high wear resistant, and with excellent adhesion to the substrate, is able to achieve success by using this method.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Tribo-corrosion Properties of MAO/DLC Coatings Using a Duplex Process on Ti6Al4V Alloys

et al. 2015

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In recent years, various technologies have been increasingly investigated for the surface modification of Ti and Ti alloys. Microarc oxidation (MAO) is one of the effective techniques to improve surface properties. However, it has some disadvantages for sliding wear applications and/or aggressive environments. In this study, the combined MAO and closed field unbalanced magnetron sputtering process was used to deposit duplex MAO/diamond-like carbon (DLC) coatings on Ti 6 Al 4 V alloy. Analysis of the microstructures, morphology, and crystallographic structure were performed by using a SEM, Raman, and XRD. The wear, corrosion, and tribo-corrosion properties of the coatings were investigated using the pinon-disk wear test, potentiodynamic polarization test, and combining tribo-corrosion test unit, respectively. The results of this study have shown that duplex MAO/DLC coatings exhibit better wear, corrosion, and tribo-corrosion properties than the DLC or MAO monolayer on Ti 6 Al 4 V alloy substrate. MAO/DLC coatings exhibited dense structure, lower coefficient of friction and corrosion current density, and higher tribo-corrosion resistance. The results have also shown that MAO/DLC duplex coatings on Ti 6-Al 4 V substrates increased the tribo-corrosion resistance by acting as a barrier layer.

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Deposition of wear resistant coatings based on diamond like carbon by unbalanced magnetron sputtering

Cited by 175 publications

References 8 publications

Protein adsorption and platelet attachment and activation, on TiN, TiC, and DLC coatings on titanium for cardiovascular applications

Protein adsorption and platelet attachment and activation, on TiN, TiC, and DLC coatings on titanium for cardiovascular applications

Tribological properties of platinum/ruthenium/nitrogen doped diamond-like carbon thin films deposited with different negative substrate biases

Analysis of Tribo-corrosion Properties of MAO/DLC Coatings Using a Duplex Process on Ti6Al4V Alloys

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