Effect of sp2/sp3 bonding ratio and nitrogen content on friction properties of hydrogen-free DLC coatings

Mabuchi, Yutaka; Higuchi, Tsuyoshi; Weihnacht, Volker

doi:10.1016/j.triboint.2013.02.007

Cited by 85 publications

(38 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…But here, the carbon bonding seems to be more important than the hydrogen content. We speculate that a further increase in hydrogen content and in sp 3 bonding is unlikely to result in harder films, as films with hydrogen contents above 40 at.% in other studies are polymer-like and thus softer [39].…”

Section: Discussionmentioning

confidence: 68%

“…Diamond-like carbon films are very hard with hardness values of more than 80 GPa [1] if the films have a high amount of sp 3 bonding and are hydrogen-free [2]. These high hardness films exhibit a low friction coefficient under oil lubrication [3]. At a lower sp 3 content, the films are softer [3].…”

Section: Introductionmentioning

confidence: 99%

“…These high hardness films exhibit a low friction coefficient under oil lubrication [3]. At a lower sp 3 content, the films are softer [3]. Hydrogenated diamond-like carbon (DLC) films have a much lower hardness as well, typically 10-20 GPa for hydrogen contents up to 40% [4,5], but add the advantages of a smoother surface [6,7], lower internal stress [8] and lower friction coefficients in dry sliding [6,9].…”

Section: Introductionmentioning

confidence: 99%

“…Incorporation of hydrogen also influences the type of carbon bonding, as seen in Raman spectra of the films [7,17]. The sp 3 content of hydrogen-containing DLC films is several tens of percent [5]. The amount varies and depends on the preparation conditions of the film.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The Influence of Preparation Conditions on the Structural Properties and Hardness of Diamond-Like Carbon Films, Prepared by Plasma Source Ion Implantation

et al. 2020

View full text Add to dashboard Cite

Diamond-like carbon (DLC) films were prepared from a hydrocarbon precursor gas by plasma source ion implantation (PSII), in which the plasma generation and the film deposition were coupled; i.e., the plasma was generated by the applied voltage and no additional plasma source was used. Several experimental parameters of the PSII process were varied, including the sample bias (high voltage, DC or pulsed), gas pressure, sample holder type and addition of argon in the plasma gas. The influence of the deposition conditions on the carbon bonding and the hydrogen content of the films was then determined using Raman spectroscopy. Nanoindentation was used to determine the hardness of the samples, and a ball-on-disk test to investigate the friction coefficient. Results suggest that films with a lower sp2 content have both a higher hydrogen content and a higher hardness. This counterintuitive finding demonstrated that the carbon bonding is more important to hardness than the reported hydrogen concentration. The highest hardness obtained was 22.4 GPa. With the exception of a few films prepared using a pulsed voltage, all conditions gave DLC films having similarly low friction coefficients, down to 0.049.

show abstract

Section: Discussionmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Influence of Preparation Conditions on the Structural Properties and Hardness of Diamond-Like Carbon Films, Prepared by Plasma Source Ion Implantation

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Nitrogenated DLC films have been exploited as both electrochemical probes for trace metal analysis and as coatings for glucose oxidase biosensor selective membranes [116][117][118][119].…”

Section: Diamond-like Carbonmentioning

confidence: 99%

Carbon nanomaterials and their application to electrochemical sensors: a review

Power¹,

Gorey²,

Chandra³

et al. 2018

Nano Online

View full text Add to dashboard Cite

Carbon has long been applied as an electrochemical sensing interface owing to its unique electrochemical properties. Moreover, recent advances in material design and synthesis, particularly nanomaterials, has produced robust electrochemical sensing systems that display superior analytical performance. Carbon nanotubes (CNTs) are one of the most extensively studied nanostructures because of their unique properties. In terms of electroanalysis, the ability of CNTs to augment the electrochemical reactivity of important biomolecules and promote electron transfer reactions of proteins is of particular interest. The remarkable sensitivity of CNTs to changes in surface conductivity due to the presence of adsorbates permits their application as highly sensitive nanoscale sensors. CNT-modified electrodes have also demonstrated their utility as anchors for biomolecules such as nucleic acids, and their ability to diminish surface fouling effects. Consequently, CNTs are highly attractive to researchers as a basis for many electrochemical sensors. Similarly, synthetic diamonds electrochemical properties, such as superior chemical inertness and biocompatibility, make it desirable both for (bio) chemical sensing and as the electrochemical interface for biological systems. This is highlighted by the recent development of multiple electrochemical diamond-based biosensors and bio interfaces.Keywords: bio sensors; carbon nanomaterials; carbon nanotubes; electrochemical sensing; synthetic diamond Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.

show abstract