Correlation between &lt;I&gt;I&lt;/I&gt;&lt;SUB&gt;D&lt;/SUB&gt;&amp;frasl;&lt;I&gt;I&lt;/I&gt;&lt;SUB&gt;G&lt;/SUB&gt; Ratio from Visible Raman Spectra and sp&lt;SUP&gt;2&lt;/SUP&gt;/sp&lt;SUP&gt;3&lt;/SUP&gt; Ratio from XPS Spectra of Annealed Hydrogenated DLC Film

Tai, Fong-Cheng; Lee, Shih-Chin; Wei, Chehung; Tyan, Shing-Long

doi:10.2320/matertrans.47.1847

Cited by 161 publications

(60 citation statements)

References 43 publications

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“…In addition to the carbon (C) peak, the oxygen (O) peak contributes by C=O bond is also apparent. The spectra were fitted with three Gaussian curves on a Shirley background [26] with the binding energies centred at around 285.0eV, 287.0eV and 289.0eV, corresponding to sp 2 -C, sp 3 -C and C=O, respectively [27]. The peaks observed for sample deposited at D E of 6 cm, 4 cm, 2 cm and 1 cm are almost similar at ~284.8eV while their full width at half maximum (FWHM) are 4.1, 4.5, 4.6 and 4.8eV, respectively.…”

Section: Xps Analysismentioning

confidence: 99%

Wetting behaviour of carbon nitride nanostructures grown by plasma enhanced chemical vapour deposition technique

Kamal

Ritikos

Rahman

2015

Applied Surface Science

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Section: Xps Analysismentioning

confidence: 99%

Wetting behaviour of carbon nitride nanostructures grown by plasma enhanced chemical vapour deposition technique

Kamal

Ritikos

Rahman

2015

Applied Surface Science

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“…This diagram shows the fraction of carbon sites that have sp 2 (graphite-like) bonding, sp 3 (diamond-like) bonding or bonding with hydrogen. Quantitative analysis of sp 2 and sp 3 bonding in a DLC can be performed by XPS analysis [25,26]. In the present study, the DLC-1 had a higher sp 2 /sp 3 ratio (0.343) at the external surface region (ca.…”

Section: Discussionmentioning

confidence: 50%

Effects of sp2/sp3 Ratio and Hydrogen Content on In Vitro Bending and Frictional Performance of DLC-Coated Orthodontic Stainless Steels

et al. 2018

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Abstract:This study investigated a diamond-like carbon (DLC) coating formed on stainless steels (disk and wire specimens) using a plasma-based ion implantation/deposition method with two different parameters (DLC-1, DLC-2). These specimens were characterized using high-resolution elastic recoil analysis, microscale X-ray photoelectron spectroscopy and nanoindentation testing to determine the hydrogen content, sp 2 /sp 3 ratio and mechanical properties of the coating. Three-point bending and frictional properties were estimated. DLC-1 had a diamond-rich structure at the external surface and a graphite-rich structure at the inner surface, while DLC-2 had a graphite-rich structure at the external surface and a diamond-rich structure at the inner surface. Mean mechanical property values obtained for the external surface were lower than those for the inner surface in both types of DLC-coated specimens. The hydrogen content of DLC-2 was slightly higher versus DLC-1. Both DLC-coated wires produced a significantly higher elastic modulus according to the three-point bending test versus the non-coated wire. DLC-2 produced significantly lower frictional force than the non-coated specimen in the drawing-friction test. The coating of DLC-1 was partially ruptured by the three-point bending and drawing-friction tests. In conclusion, the bending and frictional performance of DLC-coated wire were influenced by the hydrogen content and sp 2 /sp 3 ratio of the coating.

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“…9 [18]. It can be seen that dry milling leads to increased sp 2 content, whereas introducing water or methanol to the process reduces this effect.…”

Section: Analysis Of Changes In Phase Compositionmentioning

confidence: 95%

CVD carbon powders modified by ball milling

Kaźmierczak

Kaczorowski

Niedzielski

2015

Materials Science-Poland

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Carbon powders produced using a plasma assisted chemical vapor deposition (CVD) methods are an interesting subject of research. One of the most interesting methods of synthesizing these powders is using radio frequency plasma. This method, originally used in deposition of carbon films containing different sp 2 /sp 3 ratios, also makes possible to produce carbon structures in the form of powder. Results of research related to the mechanical modification of these powders have been presented. The powders were modified using a planetary ball mill with varying parameters, such as milling speed, time, ball/powder mass ratio and additional liquids. Changes in morphology and particle sizes were measured using scanning electron microscopy and dynamic light scattering. Phase composition was analyzed using Raman spectroscopy. The influence of individual parameters on the modification outcome was estimated using statistical method. The research proved that the size of obtained powders is mostly influenced by the milling speed and the amount of balls. Powders tend to form conglomerates sized up to hundreds of micrometers. Additionally, it is possible to obtain nanopowders with the size around 100 nm. Furthermore, application of additional liquid, i.e. water in the process reduces the graphitization of the powder, which takes place during dry milling.

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Correlation between <I>I</I><SUB>D</SUB>&frasl;<I>I</I><SUB>G</SUB> Ratio from Visible Raman Spectra and sp<SUP>2</SUP>/sp<SUP>3</SUP> Ratio from XPS Spectra of Annealed Hydrogenated DLC Film

Cited by 161 publications

References 43 publications

Wetting behaviour of carbon nitride nanostructures grown by plasma enhanced chemical vapour deposition technique

Wetting behaviour of carbon nitride nanostructures grown by plasma enhanced chemical vapour deposition technique

Effects of sp2/sp3 Ratio and Hydrogen Content on In Vitro Bending and Frictional Performance of DLC-Coated Orthodontic Stainless Steels

CVD carbon powders modified by ball milling

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