Comparative surface and nano-tribological characteristics of nanocomposite diamond-like carbon thin films doped by silver

Zhang, Hanshen; Endrino, José L.; Anders, André

doi:10.1016/j.apsusc.2008.07.193

Cited by 179 publications

(74 citation statements)

References 32 publications

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“…Obviously the absence of Ag peaks in the samples with Ag content below 13.1 at.% cannot exclude the presence of small Ag clusters with sizes below 2 nm, which are not detectable in XRD analysis. Silver carbides were neither expected nor observed and our results corroborate the studies on similar coating systems [15, 26,27,28]. In fact, previous studies of DLC coatings alloyed with silver indicated that the microstructure of these coatings was characterized as random dispersion of metallic Ag nanoparticles in an amorphous C-matrix [28,29].…”

Section: Chemical Composition and Microstructuresupporting

confidence: 89%

Influence of Ag content on mechanical and tribological behavior of DLC coatings

Manninen

Ribeiro

Escudeiro

et al. 2013

Surface and Coatings Technology

103

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Ag-DLC coatings with Ag contents ranging from 1.3 at.% to 13.1 at.% were deposited by DC magnetron sputtering. The coatings were characterized with respect to their structure (by means of XRD and Raman Spectroscopy), mechanical and tribological properties (by scratch test, nanoindentation, residual stress measurements and pin-on-disk test). The incorporation of 13.1 at.% Ag resulted in the formation of Ag grains with 2-3 nm which promoted the increase of graphite like bonds organized in rings. Regarding the mechanical properties, no variations were found for films with Ag contents lower than 13 at.%; a reduction of both hardness and compressive residual stress were then observed for higher values. Pin-on-disk tests were performed at two different contact pressures (690 MPa and 1180 MPa) in dry sliding conditions against a zirconia counterpart. For the lower contact pressure the variations in the wear rate are well correlated with the coatings structure and mechanical properties, while for higher contact pressure the presence of Ag is relevant, Ag-DLC coatings showing higher wear rate than DLC one. SEM analysis revealed the formation of Ag aggregates on the wear track and adhesion of silver to the counterpart.

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Section: Chemical Composition and Microstructuresupporting

confidence: 89%

Influence of Ag content on mechanical and tribological behavior of DLC coatings

Manninen

Ribeiro

Escudeiro

et al. 2013

Surface and Coatings Technology

103

View full text Add to dashboard Cite

show abstract

“…Moreover, as shown in Fig. 3, the curve-fitted C1s consists of four constituent peaks at binding energies of 282.9, 284.4, 285.2 and 286.58 eV, well corresponding to C-Si, sp 2 -C, sp 3 -C and C=O/C-O bonds [28,29]. XPS not only supports high fraction of sp2-C constituents in Si/GLC film, but also well gives the identification of the silicon-carbon bonding, and a small fraction of silicon carbide is believed to be presented in amorphous carbon matrix which is in good accordance with XRD analysis shown in Fig.…”

Section: Tribological Testmentioning

confidence: 98%

Tribological Properties of Si-Doped Graphite-Like Amorphous Carbon Film of PEEK Rubbing with Different Counterparts in SBF Medium

et al. 2015

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The present investigation has been conducted in order to evaluate the friction and wear behaviors of polyaryl-ether-ether-ketone coated with a Si/GLC film sliding against 100Cr6 steel, Al 2 O 3 and Si 3 N 4 balls in a biological medium of simulated body fluid, using the ballon-disk tribological tests. The test results show that the wear volume loss of the rubbing pairs is two orders of magnitude greater than that determined for the tribo-pairs in SBF lubrication, coefficient of friction decreases by 50 % at least, as compared to that in dry conditions. The friction coefficient showed the same varied trend with Hertzian contact radius. The wear rate showed the inverse varied trend with the contact pressure. The interfacial tribochemically reacted with moisture available in SBF medium plays an effect role of the difference in the wearresistant and lubricating behavior. Furthermore, some indexes including hardness ratio of pair and film were employed to predict the wear behavior of GLC composite films sliding against different counterparts. The Si/GLC nanocomposite films would be a new kind of promising materials applied to artificial heart valves and stents.

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“…For instance, the performance of a-C can be tuned with the incorporation of transition metal in the material, such as Ag, Cu, or Ti nanoparticles: 11,[13][14][15][16][17][18][19][20][21] for metal-containing DLC, the carbon matrix provides high mechanical strength and the metallic inclusion enhances optical absorption. The structure and properties of the composite generally depend on the preparation technique and the deposition conditions, 6,8 which make the identification of universal structure-property relationships a challenging task.…”

Section: Introductionmentioning

confidence: 99%

Optical and elastic properties of diamond-like carbon with metallic inclusions: A theoretical study

Tritsaris¹,

Mathioudakis²,

Kelires³

et al. 2012

Journal of Applied Physics

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A tough material commonly used in coatings is diamond-like carbon (DLC), that is, amorphous carbon with content in four-fold coordinated C higher than $70%, and its composites with metal inclusions. This study aims to offer useful guidelines for the design and development of metalcontaining DLC coatings for solar collectors, where the efficiency of the collector depends critically on the performance of the absorber coating. We use first-principles calculations based on density functional theory to study the structural, electronic, optical, and elastic properties of DLC and its composites with Ag and Cu inclusions at 1.5% and 3.0% atomic concentration, to evaluate their suitability for solar thermal energy harvesting. We find that with increasing metal concentration optical absorption is significantly enhanced while at the same time, the composite retains good mechanical strength: DLC with 70-80% content in four-fold coordinated C and small metal concentrations (<3 at. %) will show high absorption in the visible (absorption coefficients higher than 10 5 cm À1) and good mechanical strength (bulk and Young's modulus higher than 300 and 500 GPa, respectively).

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Comparative surface and nano-tribological characteristics of nanocomposite diamond-like carbon thin films doped by silver

Cited by 179 publications

References 32 publications

Influence of Ag content on mechanical and tribological behavior of DLC coatings

Influence of Ag content on mechanical and tribological behavior of DLC coatings

Tribological Properties of Si-Doped Graphite-Like Amorphous Carbon Film of PEEK Rubbing with Different Counterparts in SBF Medium

Optical and elastic properties of diamond-like carbon with metallic inclusions: A theoretical study

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