Tribology of diamond-like carbon sliding against itself, silicon nitride, and steel

Jia, K.; Li, Y.Q.; Fischer, Thomas M.; Gallois, B.

doi:10.1557/jmr.1995.1403

Cited by 61 publications

(22 citation statements)

References 11 publications

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“…The in situ results support two earlier inferences from past ex situ analyses: (1) solid lubricant coatings like DLC [12,[34][35][36][37][38][39] and MoS 2 [17,18,[40][41][42][43] rely on transfer films to maintain low friction and wear, and (2) interfacial sliding is the dominant VAM. In situ optical images and video recordings of the sliding interface confirmed how this friction behavior might be controlled by third bodies.…”

Section: Discussionsupporting

confidence: 86%

Role of the Transfer Film on the Friction and Wear of Metal Carbide Reinforced Amorphous Carbon Coatings During Run-in

Scharf¹,

Singer

2009

Tribol Lett

112

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The relationship between friction, wear, and transfer films of three metal carbide-reinforced amorphous carbon coatings (TiC/a:C, TiC/a:C-H, and WC/a:C-H), sometimes referred to as metal-doped diamond-like carbon coatings, has been investigated. Tribological tests were performed in an in situ tribometer with sapphire or steel hemispheres run against coated flats in dry or ambient air. The sliding contact interface was observed and recorded by optical microscopy during reciprocating sliding tests. The friction and wear behavior during run-in depended on the number of sliding cycles to form a stationary transfer film on the hemisphere. Stationary transfer films formed rapidly (within ten cycles) and the friction coefficient fell to 0.2 (ambient air) or 0.1 (dry air), except with sapphire against WC/a:C-H in dry air; with the latter, a stationary transfer film required nearly 100 cycles to form, during which the friction remained high and the wear rate was from 10 to 100 times higher than the other two coatings. For all coatings, three velocity accommodation modes (VAM) were observed from run-in to steady-state sliding and were correlated with the friction and wear behavior. The delayed adherence of the transfer film to sapphire from WC/a:C-H coatings in dry air is discussed in terms of equilibrium thermochemistry. Friction and wear behavior during run-in, therefore, depended on transfer film adherence to the hemisphere and the VAM between transfer films and the coating.

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Section: Discussionsupporting

confidence: 86%

Role of the Transfer Film on the Friction and Wear of Metal Carbide Reinforced Amorphous Carbon Coatings During Run-in

Scharf¹,

Singer

2009

Tribol Lett

112

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“…The specific wear rate of harder a-CN x coating was much higher than that of the softer SiC ball in all conditions. This phenomenon has already been reported by Jia et al [50] when they studied the tribology of DLC coating sliding against Si 3 N 4 ball. The wear rate of DLC film was higher than that of Si 3 N 4 ball, which was accredited to transfer of tribo-layer from disk to ball.…”

Section: Discussionsupporting

confidence: 77%

Friction and wear properties of CNx/SiC in water lubrication

2005

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Amorphous carbon nitride coatings (a-CN x ) were deposited on SiC disk by ion beam assisted deposition (IBAD). The tribological behavior of a-CN x coating sliding against SiC ball in water was investigated and compared with that of SiC/SiC system at room temperature. The influences of testing conditions on friction coefficient and specific wear rate of both kinds of tribopairs were studied. The worn surfaces on disks were observed by scanning electron microscope (SEM). The results indicate that the running-in period of a-CN x /SiC was shorter than that of SiC/SiC system in water. At a sliding velocity of 120 mm/s, the mean steady-state friction coefficients of SiC/SiC (0.096) was higher than that of a-CN x /SiC (0.05), while at 160 mm/s, lower friction coefficient (0.01) was obtained for SiC/SiC in water. With an increment of normal load, the mean steady-state friction coefficients after running-in first decreased, reaching a minimum value, and then increased. For self-mated SiC, the specific wear rate of SiC ball was a little higher than that of SiC disk, while for a-CN x /SiC, the specific wear rate of SiC ball were 10 times smaller than that of a-CN x coating. Furthermore, the specific wear rate of SiC ball sliding against a-CN x coating was reduced by a factor up to 100$1000 in comparison to that against SiC in water. The wear mechanism of SiC/SiC system in water is related to micro-fracture of ceramic and instability of tribochemical reaction layer. Conversely, wear mechanism for a-CN x /SiC is related to formation and transfer of easy-shear friction layer.

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“…1.7 Â 10 368 was found for pin-on-disk testing of silicon nitride on 369 DLC in dry air by Jia et al [56]. Kim, Fischer, and 370 Gallois also performed pin-on-disk testing of the same 371 material system and found higher wear rates 372 ($10 )7 mm 3 N )1 m )1 ) for 50% RH air [57].…”

mentioning

confidence: 86%

“…Jia et al 519 obtained a friction coefficient of $0.05 for pin-on-disk 520 sliding of DLC against silicon nitride in dry air [56]. 521 Kim, Fischer, and Gallois also investigated pin-on-disk 522 sliding of Si 3 N 4 on DLC in various gaseous environments …”

Section: U N C O R R E C T E D P R O O Fmentioning

confidence: 99%

Small amplitude reciprocating wear performance of diamond-like carbon films: dependence of film composition and counterface material

et al. 2007

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Tribology of diamond-like carbon sliding against itself, silicon nitride, and steel

Cited by 61 publications

References 11 publications

Role of the Transfer Film on the Friction and Wear of Metal Carbide Reinforced Amorphous Carbon Coatings During Run-in

Role of the Transfer Film on the Friction and Wear of Metal Carbide Reinforced Amorphous Carbon Coatings During Run-in

Friction and wear properties of CNx/SiC in water lubrication

Small amplitude reciprocating wear performance of diamond-like carbon films: dependence of film composition and counterface material

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