Acoustic Microscopy, Brillouin Scattering and Laser-Saw Technique for Defect Characterization in DLC Films

Zinin, Pavel V.; Dong, Fang; Rebinsky, Douglas A.; Manghnani, Murli H.; Berezina, Sofia; Lemor, Robert; Blasé, Christopher; Caron, Arnaud; Schneider, Dieter; Kraemer, Klaus

doi:10.1007/978-1-4020-2402-3_29

Cited by 2 publications

(1 citation statement)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The elastic constants depend quite significantly on the structural and compositional properties of the DLC. For example, the measured value for a film can drop from about 460 GPa to less than 70 GPa due to the doping with chromium since the presence of metallic atoms in general reduces the respective quantities in carbon‐based structures . However, a certain agreement between the theory and experiment implies that the constructed model is realistic enough to be applied for investigations of other properties.…”

Section: The Calculated Binding Energies In Ry For Diamond‐like Carbomentioning

confidence: 98%

Ab-initioinvestigation of chemical-bond formation at the diamond-like carbon surface

Komelj

Kalin

Durham³

2014

Lubr. Sci.

View full text Add to dashboard Cite

Diamond-like carbon (DLC) is a promising material for tribology-based applications. We investigate the susceptibility of the DLC surface to some characteristic molecules that are potentially present in various lubricants by means of ab-initio calculations. We demonstrate that the strongest bond is formed between the oxygen atoms from the molecule and the metallic dopants present in the DLC. We present the first experimental evidence that proves the theoretical hypothesis. Copyright © 2014 John Wiley & Sons, Ltd. Amorphous, DLC might be an ideal material for tribology applications in computer, aerospace and automotive components because it is hard, and at the same time, its surface is characterised by a low friction coefficient. 1 The reason is that it combines the properties of diamond and graphite, which are due to the sp 3 or sp 2 coordination of the C atoms, respectively. In diamond, each C atom makes four sp 3 bonds with the nearest neighbours, forming a tetrahedron, which results in a compact crystal structure distinguished by the hardness of the corresponding material. On the other hand, graphite is made of layers of sp 2 -bonded atoms with the coordination number of three. The parallel layers can smoothly slide over each other. Amorphous DLC consists of both sp 3 and sp 2 atoms -hence, it simultaneously exhibits hardness and low friction. In addition to a small number of sp 1 C atoms, a real material is usually hydrated and doped by some metallic atoms. The sp 3 /sp 2 ratio between the numbers of the correspondingly hybridised atoms, the hydrogen concentration and the type and the level of doping represent the parameters that control the properties of the DLC coating. Although a clean DLC surface is as slippery as ice, with a friction coefficient below 0.05, which is much lower than the friction coefficient of a clean metallic surface, a realistic application would often include the presence of a lubricant.

show abstract

Section: The Calculated Binding Energies In Ry For Diamond‐like Carbomentioning

confidence: 98%

Ab-initioinvestigation of chemical-bond formation at the diamond-like carbon surface

Komelj

Kalin

Durham³

2014

Lubr. Sci.

View full text Add to dashboard Cite

show abstract

Combined FIB technique with acoustic microscopy to detect steel–DLC interface defects

Bernland

Köhler

Zinin

et al. 2006

Diamond and Related Materials

View full text Add to dashboard Cite

Acoustic Microscopy, Brillouin Scattering and Laser-Saw Technique for Defect Characterization in DLC Films

Cited by 2 publications

References 3 publications

Ab-initioinvestigation of chemical-bond formation at the diamond-like carbon surface

Ab-initioinvestigation of chemical-bond formation at the diamond-like carbon surface

Combined FIB technique with acoustic microscopy to detect steel–DLC interface defects

Contact Info

Product

Resources

About