Tribological behaviour of smooth diamond films

Pimenov, S.M.; Smolin, A.A.; Obraztsova, E. D.; Konov, V. I.; Bögli, U.; Blatter, A.; Maillat, M.; Leijala, A.; Burger, J.P.; Hintermann, H.E.; Loubnin, E.N.

doi:10.1016/0257-8972(95)02610-x

Cited by 14 publications

(3 citation statements)

References 9 publications

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“…NCD by MPCVD has even lower COF, when compared with reported values of COF for diamond on diamond sliding (between 0.05 and 0.15). This can be attributed to two factors: initially very smooth film surface with resulting low COF [21], and the lubricating effect of amorphous carbon [23]. …”

Section: Resultsmentioning

confidence: 99%

“…The relationship between the wear volume and normal load is very obvious: the higher the normal load, the larger the wear volumes of diamond film. As a consequence of the increase of contact pressure, it is believed more asperities will be brought to contact and more asperity collisions will take place [5,21,25]. The wear volume of the sphere is represented by the shaded part shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

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Tribological properties of undoped and boron-doped nanocrystalline diamond films

2008

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Undoped and boron-doped nanocrystalline (NCD) diamond films were deposited on mirror polished Ti-6Al-4V substrates in a Microwave Plasma Assisted Chemical Vapor Deposition system. Sliding wear tests were conducted in ambient air with a nanotribometer. A systematic study of the tribological properties for both undoped and boron-doped NCD films were carried out. It was found for diamond/ diamond sliding, coefficient of friction decreases with increasing normal loads. It was also found that the wear rate of boron-doped NCD films is about 10 times higher than that of undoped films. A wear rate of ~5.2×10 −9 mm 3 /Nm was found for undoped NCD films. This value is comparable to the best known value of that of polished polycrystalline diamond films. Although no surface deformation, film delamination or micro-cracking were observed for undoped films, boron-doped NCD film undergoes a critical failure at a normal stress of 2.2 GPa, above which surface deformation is evident. Combined with high hardness and modulus, tunable conductivity and improved open air thermal stability, boron-doped nanocrystalline diamond film has tremendous potentials for applications such as Atomic Force Microscope probes, Micro-Electro-Mechanical System devices and biomedical sensors.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Tribological properties of undoped and boron-doped nanocrystalline diamond films

2008

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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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Tribological properties of SiC-based MCD films synthesized using different carbon sources when sliding against Si 3 N 4

Wang

Shen

2016

Applied Surface Science

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Tribological behaviour of smooth diamond films

Cited by 14 publications

References 9 publications

Tribological properties of undoped and boron-doped nanocrystalline diamond films

Tribological properties of undoped and boron-doped nanocrystalline diamond films

Relation between Self-Organization and Wear Mechanisms of Diamond Films

Tribological properties of SiC-based MCD films synthesized using different carbon sources when sliding against Si 3 N 4

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