Micro‐Raman Studies on DLC coatings

Irmer, G.; Dorner-Reisel, Annett

doi:10.1002/adem.200500006

Cited by 248 publications

(157 citation statements)

References 74 publications

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“…22), 23) It is very sensitive to the s-p hybridization state of carbon and thus provides valuable information about the nano/microstructure and the degree of ordering of the material. The Raman spectrum of, e.g., diamond shows a single peak at 1333 cm ¹1 due to the tetrahedral sp 3 -bonds, whereas sp 2 -bonded graphite exhibits a peak at 1580 cm ¹1 assigned to the E 2g vibration (G mode).…”

Section: Introductionmentioning

confidence: 99%

UV Raman spectroscopy of segregated carbon in silicon oxycarbides

Roth

Waleska

Heß

et al. 2016

J. Ceram. Soc. Japan

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Polymer-derived silicon oxycarbides exhibiting¯1 and 10 vol.% of segregated carbon finely dispersed within a glassy Si x O y C z matrix have been investigated by UV Raman spectroscopy using a laser excitation of 4.8 eV ( = 256.7 nm). Carbon exists as amorphous sp 2 sp 3 bonded component in SiOC/C (¯1 vol.%) pyrolyzed at 1100°C in H 2 , including CC single bonds, polymeric chains and small polycyclic aromatic hydrocarbons (PAHs). The formation of nanocrystalline carbon at T > 1400°C is seen in the Raman spectra of SiOC/C (¯1 vol.%) and SiOC/C (10 vol.%) by the appearance of the G band of graphite. Tempering at 1600°C increases the degree of order within the carbon phase. However, the slight narrowing of the G peak with processing temperature (by about 5%) indicates still not well-crystallized carbon: the Raman results can be best explained by turbostratic carbon (with a lateral size L a of µ2 nm) and do not support the model description in literature as a network of single layer graphene.

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Section: Introductionmentioning

confidence: 99%

UV Raman spectroscopy of segregated carbon in silicon oxycarbides

Roth

Waleska

Heß

et al. 2016

J. Ceram. Soc. Japan

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“…The Raman spectrum in Fig. 20a shows peaks at 1,567 and 1,386 per cm, commonly referred to as G band (sp2) and D band (sp3) (Irmer and Dorner-Reisel 2005). A slight shift of the peaks is observed in Figs.…”

Section: Reciprocating Wear Testingmentioning

confidence: 92%

Investigation of contact deformation and wear characteristics of discrete track recording media

Yoon

Talke

2011

Microsyst Technol

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The contact deformation and wear characteristics of smooth and discrete track recording (DTR) media are investigated using nano-indentation and nano-scratch testing. Plastic deformation of the land areas between adjacent grooves was found to be substantially larger than in the smooth regions of the same disk. Reciprocating wear tests showed that wear was more severe for discrete track disks than for smooth disks. To improve the tribology of DTR media, planarization of discrete track disks appears to be necessary.

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“…Figure 6 shows the Raman spectra of the as-deposited DLC coatings. Typically, Raman spectra for DLC comprise of two carbon peaks at around 1580 cm -1 and 1330 -1380 cm -1 , called the G-peak and D-peak respectively [26,27]. These peaks often show changes in position and intensity based upon structural changes.…”

Section: Raman Spectroscopy Of Transfer Layersmentioning

confidence: 99%

Interpreting the effects of interfacial chemistry on the tribology of diamond-like carbon coatings against steel in distilled water

Sutton

Limbert

Burdett

et al. 2013

Wear

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Three commercially available Diamond-Like Carbon (DLC) coatings were investigated to help understand the dynamics of transfer layer formation and decay, when sliding against AISI 52100 steel balls in distilled water.Optimum tribological behaviour was observed during interfacial sliding between the transfer layer and DLC coating. Alternatively, shear of the carbonaceous transfer layer from the contact region resulted in growth of an iron oxide layer comprised of magnetite, maghemite and hematite, as identified by Raman spectra. Threebody abrasive wear involving iron oxide wear particles explained the high wear rate of the DLC coatings in the case of shear.Friction was controlled by the formation of a transfer layer, reducing adhesive interactions between surfaces.Subsequently, a gradual increase in friction was observed, and suggested to relate to an increase in the shear strength of the transfer layer due to adsorption of oxidative species. This was modelled using the Elovich equation for gas adsorption kinetics.

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Micro‐Raman Studies on DLC coatings

Cited by 248 publications

References 74 publications

UV Raman spectroscopy of segregated carbon in silicon oxycarbides

UV Raman spectroscopy of segregated carbon in silicon oxycarbides

Investigation of contact deformation and wear characteristics of discrete track recording media

Interpreting the effects of interfacial chemistry on the tribology of diamond-like carbon coatings against steel in distilled water

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