HFCVD nanocrystalline diamond coatings for tribo-applications in the presence of water

Abreu, C.S.; Amaral, M.; Oliveira, F.J.; Gomes, J.R.; Silva, Rui

doi:10.1016/j.diamond.2008.08.016

Cited by 42 publications

(17 citation statements)

References 19 publications

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“…These morphological and topographic characteristics, together with diamond´s extreme hardness and chemical inertness, are key factors for the application of NCD coatings in tribology. In fact, several works on the tribological behaviour of NCD-on-NCD contacts have been demonstrated the excellence of this tribopair [3][4][5][6][7]. Following a short-time running-in period where the protruding nanodiamond asperities suffer from truncation and blunting, the NCD-on-NCD sliding system attains a steady-state friction regime with very low friction coefficients (0.01-0.05), characteristic of highly polished passivated surfaces [4][5][6][7].…”

Section: Introductionmentioning

confidence: 97%

“…In fact, several works on the tribological behaviour of NCD-on-NCD contacts have been demonstrated the excellence of this tribopair [3][4][5][6][7]. Following a short-time running-in period where the protruding nanodiamond asperities suffer from truncation and blunting, the NCD-on-NCD sliding system attains a steady-state friction regime with very low friction coefficients (0.01-0.05), characteristic of highly polished passivated surfaces [4][5][6][7]. A very mild wear regime is in line with this friction response, with low wear coefficient values in the range of 10 -9 mm 3 ⋅N -1 ⋅m -1 for water lubricated contacts [5] and one order of magnitude higher for dry systems [4].…”

Section: Introductionmentioning

confidence: 98%

“…Following a short-time running-in period where the protruding nanodiamond asperities suffer from truncation and blunting, the NCD-on-NCD sliding system attains a steady-state friction regime with very low friction coefficients (0.01-0.05), characteristic of highly polished passivated surfaces [4][5][6][7]. A very mild wear regime is in line with this friction response, with low wear coefficient values in the range of 10 -9 mm 3 ⋅N -1 ⋅m -1 for water lubricated contacts [5] and one order of magnitude higher for dry systems [4]. A self-polishing micro-scale abrasive wear mechanism controls the wear behaviour of the NCD-on-NCD tribosystems [7].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The High performance of nanocrystalline CVD diamond coated hip joints in wear simulator test

Maru

Amaral

Rodrigues

et al. 2015

Journal of the Mechanical Behavior of Biomedical Materials

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The superior biotribological performance of nanocrystalline diamond (NCD) coatings grown by a chemical vapor deposition (CVD) method was already shown to demonstrate high wear resistance in ball on plate experiments under physiological liquid lubrication. However, tests with a close-to-real approach were missing and this constitutes the aim of the present work. Hip joint wear simulator tests were performed with cups and heads made of silicon nitride coated with NCD of ~10 μm in thickness. Five million testing cycles (Mc) were run, which represent nearly five years of hip joint implant activity in a patient. For the wear analysis, gravimetry, profilometry, scanning electron microscopy and Raman spectroscopy techniques were used. After 0.5 Mc of wear test, truncation of the protruded regions of the NCD film happened as a result of a fine-scale abrasive wear mechanism, evolving to extensive plateau regions and highly polished surface condition (Ra<10nm). Such surface modification took place without any catastrophic features as cracking, grain pullouts or delamination of the coatings. A steady state volumetric wear rate of 0.02 mm(3)/Mc, equivalent to a linear wear of 0.27 μm/Mc favorably compares with the best performance reported in the literature for the fourth generation alumina ceramic (0.05 mm(3)/Mc). Also, squeaking, quite common phenomenon in hard-on-hard systems, was absent in the present all-NCD system.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The High performance of nanocrystalline CVD diamond coated hip joints in wear simulator test

Maru

Amaral

Rodrigues

et al. 2015

Journal of the Mechanical Behavior of Biomedical Materials

Self Cite

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show abstract

“…At present, carbon-based coatings and transition metal nitride-based coatings are the promising candidates for the sliding parts in water hydraulic systems and the journal bearings and mechanical face seals for water pump [11]. As is known, carbonbased coatings (such as Diamond [12], DLC [13][14][15][16], a-CN x [17][18][19][20] and GLC [21][22][23]) have exhibited low friction coefficient and low wear rate as sliding against ceramic and steel balls in water. However, the poor adhesion strength to substrate, high internal stress and weak thermal stability would limit their application [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Influence of trimethylsilane flow on the microstructure, mechanical and tribological properties of CrSiCN coatings in water lubrication

Zhou

Wang

et al. 2015

Applied Surface Science

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“…Researchers mainly studied on the friction performance of self-mated diamond coatings on Si 3 N 4 substrates in ambient atmosphere [8] , physiological fluids [5] and water [9] . Their studies presented that the asdeposited coatings deposited on Si 3 N 4 substrates had excellent tribological performance, high wear resistance and good adhesion.…”

Section: Introductionmentioning

confidence: 99%

Friction and cutting properties of hot-filament chemical vapor deposition micro- and fine-grained diamond coated silicon nitride inserts

Yang

Shen

Sun

2010

J. Shanghai Jiaotong Univ. (Sci.)

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The micro-crystalline diamond (MCD) and fine-grained diamond (FGD) films are deposited on commercial silicon nitride inserts by the hot-filament chemical vapor deposition (HFCVD) method. The friction and cutting properties of as-deposited MCD and FGD films coated silicon nitride (Si3N4) inserts are comparatively investigated in this study. The scanning electron microscopy (SEM) and Raman spectroscopy are adopted to study the characterization of the deposited diamond films. The friction tests are conducted on a ball-on-plate type reciprocating friction tester in ambient air using Co-cemented tungsten carbide (WC-Co), Si3N4 and ball-bearing steel (BBS) balls as the mating materials of the diamond films. For sliding against WC-Co, Si3N4 and BBS, the FGD film presents lower friction coefficients than the MCD film. However, after sliding against Si3N4, the FGD film is subject to more severe wear than the MCD film. The cutting performance of as-deposited MCD and FGD coated Si3N4 inserts is examined in dry turning glass fiber reinforced plastics (GFRP) composite materials, comparing with the uncoated Si3N4 insert. The results indicate that the lifetime of Si3N4 inserts can be prolonged by depositing the MCD or FGD film on them and the FGD coated insert shows longer cutting lifetime than the MCD coated one.

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HFCVD nanocrystalline diamond coatings for tribo-applications in the presence of water

Cited by 42 publications

References 19 publications

The High performance of nanocrystalline CVD diamond coated hip joints in wear simulator test

The High performance of nanocrystalline CVD diamond coated hip joints in wear simulator test

Influence of trimethylsilane flow on the microstructure, mechanical and tribological properties of CrSiCN coatings in water lubrication

Friction and cutting properties of hot-filament chemical vapor deposition micro- and fine-grained diamond coated silicon nitride inserts

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