Tribological properties of nanocrystalline diamond films deposited by hot filament chemical vapor deposition

Kumar, N.; Panda, Kalpataru; Dash, S.; Popov, C.; Reithmaier, Johann Peter; Panigrahi, B. K.; Tyagi, AK; Raj, Baldev

doi:10.1063/1.4751272

Cited by 19 publications

(10 citation statements)

References 32 publications

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“…The as-generated UNCD film can be very smooth [75,76] and it shows high wear-resistance. Therefore, it offers sustainable tribological properties, especially in high humid environments [77][78][79][80]. At early times, there are mainly two hypothesizes proposed to explain Since moisture has a negative effect on the friction and wear of a-C:H films, some efforts have been made to decrease the humidity dependence.…”

Section: Ultra-nanocrystalline Diamond (Uncd)mentioning

confidence: 99%

Effect of Humidity on Friction and Wear—A Critical Review

et al. 2018

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The friction and wear behavior of materials are not intrinsic properties, but extrinsic properties; in other words, they can drastically vary depending on test and environmental conditions. In ambient air, humidity is one such extrinsic parameter. This paper reviews the effects of humidity on macro- and nano-scale friction and wear of various types of materials. The materials included in this review are graphite and graphene, diamond-like carbon (DLC) films, ultrananocrystalline diamond (UNCD), transition metal dichalcogenides (TMDs), hexagonal boron nitride (h-BN), boric acid, silicon, silicon oxide, silicates, advanced ceramics, and metals. Details of underlying mechanisms governing friction and wear behaviors vary depending on materials and humidity; nonetheless, a comparison of various material cases revealed an overarching trend. Tribochemical reactions between the tribo-materials and the adsorbed water molecules play significant roles; such reactions can occur at defect sites in the case of two-dimensionally layered materials and carbon-based materials, or even on low energy surfaces in the case of metals and oxide materials. It is extremely important to consider the effects of adsorbed water layer thickness and structure for a full understanding of tribological properties of materials in ambient air.

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Section: Ultra-nanocrystalline Diamond (Uncd)mentioning

confidence: 99%

Effect of Humidity on Friction and Wear—A Critical Review

et al. 2018

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“…In spite of the counterbodies smoothing and formation of carbonaceous layer, the different types of COF curves were observed after the tests on diamond films. An increase of the COF value at the beginning of sliding was found in the tests with a larger normal load on the thicker films [ 28 , 29 ] and on the thinner films with the same normal load [ 30 ], which indicates the importance of stress and deformation to explain the tribological behavior of diamond films.…”

Section: Introductionmentioning

confidence: 99%

Relation between Self-Organization and Wear Mechanisms of Diamond Films

Podgursky

Bogatov

Yashin

et al. 2018

Entropy

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Abstract:The study deals with tribological properties of diamond films that were tested under reciprocal sliding conditions against Si 3 N 4 balls. Adhesive and abrasive wear are explained in terms of nonequilibrium thermodynamic model of friction and wear. Surface roughness alteration and film deformation induce instabilities in the tribological system, therefore self-organization can occur. Instabilities can lead to an increase of the real contact area between the ball and film, resulting in the seizure between the sliding counterparts (degenerative case of self-organization). However, the material cannot withstand the stress and collapses due to high friction forces, thus this regime of sliding corresponds to the adhesive wear. In contrast, a decrease of the real contact area leads to the decrease of the coefficient of friction (constructive self-organization). However, it results in a contact pressure increase on the top of asperities within the contact zone, followed by material collapse, i.e., abrasive wear. Mentioned wear mechanisms should be distinguished from the self-lubricating properties of diamond due to the formation of a carbonaceous layer.

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“…Diamond is a wide band gap material 1 with high thermal conductivity, 2 extreme hardness, 3 high elastic modulus 3 and unique friction and wear performances. [4][5][6] All these outstanding properties of crystalline diamond are associated to the sp 3 -hybridized chemical bonding of carbon atoms in cubic tetrahedral unit-cell parameter. 7,8 Some of these properties of single crystal and micro/nanocrystalline diamond films were studied reasonably well.…”

Section: Introductionmentioning

confidence: 99%

“…passivation and graphitization of the sliding interfaces. 5,6,12,[15][16][17][18][19][20][21] In the passivation mechanism, the film surface being chemically inert is not much deformed which provides mechanical stability. In contrast, the transformation of sp 3 crystalline diamond into sp 2 and a-C phases is responsible for damage and deformation of the sliding interfaces.…”

Section: Introductionmentioning

confidence: 99%

“…The crystalline diamond films are useful for several applications due to their unique microstructure and chemical properties. Diamond is a wide band gap material with high thermal conductivity, extreme hardness, high elastic modulus, and unique friction and wear performances. − All these outstanding properties of crystalline diamond are associated with the sp 3 -hybridized chemical bonding of carbon atoms in cubic tetrahedral unit-cell parameters. , Some of these properties of single crystal and micro/nanocrystalline diamond films were studied reasonably well. Moreover, recently, field emission , and tribological properties , of ultrananocrystalline diamond (UNCD) films were found to be superior as compared to the micro/nanocrystalline counterpart.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Triboenvironment Dependent Chemical Modification of Sliding Interfaces in Ultrananocrystalline Diamond Nanowall Film: Correlation with Friction and Wear

Rani¹,

Panda

Kumar³

et al. 2017

J. Phys. Chem. C

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Tribological properties of ultrananocrystalline diamond nanowall (UNCD NW) films were investigated quantitatively in three different and controlled tribo-environmental conditions, proposing the passivation and graphitization mechanisms. However, these mechanisms are rather complicated and possibly can be understood in well-controlled tribological conditions. It was shown that the friction and wear of these films were high in high

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Tribological properties of nanocrystalline diamond films deposited by hot filament chemical vapor deposition

Cited by 19 publications

References 32 publications

Effect of Humidity on Friction and Wear—A Critical Review

Effect of Humidity on Friction and Wear—A Critical Review

Relation between Self-Organization and Wear Mechanisms of Diamond Films

Triboenvironment Dependent Chemical Modification of Sliding Interfaces in Ultrananocrystalline Diamond Nanowall Film: Correlation with Friction and Wear

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