Sliding of a diamond sphere on fused silica under ramping load

Liu, Ming; Zheng, Qiang; Gao, Chen

doi:10.1016/j.mtcomm.2020.101684

Cited by 14 publications

(3 citation statements)

References 160 publications

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“…Under oxygenation, carbon removal can proceed through the desorption of CO or CO 2 , ,, suggesting the essential role of oxygen in the formation of wear. Interestingly, the wear of diamond surfaces was observed when sliding against softer materials such as silica or silicon. ,− In these systems, the chemical adhesion and wear are initiated by the Si–C/C–O–Si chemical bonds between two mating surfaces . Thus, a systematic study considering different coverage concentrations, surface orientations, and tribological conditions is of significance to shed light on the wear of oxygenated diamond sliding against silica.…”

Section: Introductionmentioning

confidence: 99%

Nanotribological Properties of Oxidized Diamond/Silica Interfaces: Insights into the Atomistic Mechanisms of Wear and Friction by Ab Initio Molecular Dynamics Simulations

Ta,

Tran,

Righi

2023

ACS Appl. Nano Mater.

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Controlling friction and wear at silica–diamond interfaces is crucial for their relevant applications in tribology such as micro-electromechanical systems and atomic force microscopes. However, the tribological performance on diamond surfaces is highly affected by the working environment where atmospheric gases are present. In this work, we investigate the effects of adsorbed oxygen on the friction and wear of diamond surfaces sliding against silica by massive ab initio molecular dynamics simulations. Different surface orientations, O-coverages, and tribological conditions are considered. The results suggest that diamond surfaces with full oxygen passivation are very effective in preventing surface adhesion, and as a result present extremely low friction and wear. At low oxygen coverage, Si–O–C bond formation was observed as well as atomistic wear initiated from C–C bond breaking at extreme pressure. The analysis of electronic structures of the configurations resulting from key tribochemical reactions clarifies the mechanisms of friction reduction and atomistic wear. Overall, our accurate in silico experiments shed light on the influence of adsorbed oxygen on the tribological properties and wear mechanisms of diamond against silica.

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Section: Introductionmentioning

confidence: 99%

Nanotribological Properties of Oxidized Diamond/Silica Interfaces: Insights into the Atomistic Mechanisms of Wear and Friction by Ab Initio Molecular Dynamics Simulations

Ta,

Tran,

Righi

2023

ACS Appl. Nano Mater.

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“…tensile properties [28], creep behavior [29], low-cycle fatigue [30,31], residual stress [32], and fracture toughness [33,34]) of various materials (e.g., metals [35], glasses [36], metallic glasses [37], ceramics [7,38], polymers [39][40][41], piezoelectric materials [42][43][44][45], thin films [46][47][48][49], and composites [50]). Microscratch test is also an effective technique to investigate scratch resistance of material [51], the structural integrity of multilayer coatings [52], tribological behavior [53,54], contact-induced damage/cracking [55], scratch-induced buckling failure of silicon nitride ceramic films [56], and the scratch behavior of Ce-doped YAG (Yttrium aluminum garnet, Y3Al5O12) coatings [57].…”

Section: Introductionmentioning

confidence: 99%

Micromechanical characterization of microwave dielectric ceramic BaO–Sm₂O₃–5TiO₂by indentation and scratch methods

Liu¹,

Xu²

2023

Journal of Advanced Ceramics

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Mechanical characterization of dielectric ceramics, which have drawn extensive attention in wireless communication, remains challenging. Micromechanical properties with microstructures of dielectric ceramic BaO-Sm2O3-5TiO2 (BST) were assessed by nanoindentation, microhardness, and microscratch tests under different indenters, along with X-ray diffraction, scanning electron microscopy, and Raman spectroscopy. Accurate determination of elastic modulus (i.e., 260 GPa) and indentation hardness (i.e., J u s t A c c e p t e d 16.2 GPa) of brittle BST ceramic by instrumented indentation technique requires low loads with little indentation-induced damage. Elastic modulus and indentation hardness were analyzed by different methodologies such as energybased and displacement-based approaches, and elastic recovery of Knoop imprint. Consistent values (about 3.1 MPa·m 1/2 ) of fracture toughness of BST ceramic were obtained by different methods such as Vickers indenter-induced cracking method, energy-based nanoindentation approaches, and linear elastic fracture mechanics-based scratch approach with a spherical indenter, demonstrating successful applications of indentation and scratch methods in characterizing fracture properties of brittle solids. The deterioration of elastic modulus or indentation hardness with the increase in indentation load is caused by indentation-induced damage, and can be used to determine fracture toughness of material by energy-based nanoindentation approaches, and the critical void volume fraction is 0.27 (or 0.18) if elastic modulus (or indentation hardness) of the brittle BST ceramic is used. The fracture work at the critical load corresponding to the initial decrease in elastic modulus or indentation hardness can also be used to assess fracture toughness of brittle solids, opening new venues of application of nanoindentation test as a means to characterize fracture toughness of brittle ceramics.

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“…The dynamics of such sliding contacts have been analyzed with mechanically loaded hard indenters scratching the surface of glasses. − The effects of dynamic contact damage on glasses to understand controlled material removal in polishing and grinding processes were investigated in previous studies ,− in which various parameters have been observed to influence the fracture and wear of glasses during scratching, including the geometry of indenters, applied normal load, sliding velocity, and sliding friction, to name a few. The influences of normal load and sliding speed on the damage evolution at the surface and subsurface levels, respectively, were previously demonstrated for a diamond sphere sliding on soda lime silica glass, where the increase in sliding speed was linked with subsurface damage due to shearing effects .…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide Tribofilms Enhance the Scratch Resistance of Silica Glasses

Sahoo

Khatri

Krishnan

et al. 2022

ACS Appl. Nano Mater.

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Scratch-induced surface damages in glasses can significantly reduce the integrity of the glass components, leading to their eventual failure. Here, it is shown that the interfacial friction and wear on glasses during sliding in a liquid environment can be significantly reduced using aqueous graphene oxide (GO) dispersion. To this extent, the tribological generation of a GO-derived film from its aqueous dispersion during reciprocating sliding of a spherical sapphire probe over fused silica glass is demonstrated. The formation of dense GO tribofilm on the scratch track is confirmed by micro-Raman spectroscopy and atomic force microscopy analyses. Interestingly, the lubricious GO tribofilm is observed to reduce the frictional forces by about 80% compared to pure water. This reduced friction, in turn, limits the shear-induced tensile stresses in the wake of sliding contact, thereby minimizing the density of partial Hertzian cone cracks. Optical micrographs confirm the clear differences in the crack density and severity of sliding with and without the presence of the tribofilm. Furthermore, the effect of frictional forces on the wear and cracking behavior is established theoretically to supplement the understanding of friction’s role in determining the surface damages occurring during scratching. Overall, it is shown that the scratch resistance of glass surfaces in aqueous conditions could be significantly enhanced through a hitherto unknown tribofilm generation mechanism, thereby providing a fillip toward increasing the service life of glasses.

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Sliding of a diamond sphere on fused silica under ramping load

Cited by 14 publications

References 160 publications

Nanotribological Properties of Oxidized Diamond/Silica Interfaces: Insights into the Atomistic Mechanisms of Wear and Friction by Ab Initio Molecular Dynamics Simulations

Nanotribological Properties of Oxidized Diamond/Silica Interfaces: Insights into the Atomistic Mechanisms of Wear and Friction by Ab Initio Molecular Dynamics Simulations

Micromechanical characterization of microwave dielectric ceramic BaO–Sm₂O₃–5TiO₂by indentation and scratch methods

Graphene Oxide Tribofilms Enhance the Scratch Resistance of Silica Glasses

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Sliding of a diamond sphere on fused silica under ramping load

Cited by 14 publications

References 160 publications

Nanotribological Properties of Oxidized Diamond/Silica Interfaces: Insights into the Atomistic Mechanisms of Wear and Friction by Ab Initio Molecular Dynamics Simulations

Nanotribological Properties of Oxidized Diamond/Silica Interfaces: Insights into the Atomistic Mechanisms of Wear and Friction by Ab Initio Molecular Dynamics Simulations

Micromechanical characterization of microwave dielectric ceramic BaO–Sm2O3–5TiO2by indentation and scratch methods

Graphene Oxide Tribofilms Enhance the Scratch Resistance of Silica Glasses

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Micromechanical characterization of microwave dielectric ceramic BaO–Sm₂O₃–5TiO₂by indentation and scratch methods