Sliding Speed-Dependent Tribochemical Wear of Oxide-Free Silicon

Chen, Lei; Qi, Yaqiong; Yu, Bingjun; Qian, Linmao

doi:10.1186/s11671-017-2176-8

Cited by 21 publications

(17 citation statements)

References 33 publications

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“…Over the same range of the sliding speed, the maximum wear depth (total wear volume) decreases from 0.58 μm (3.28 × 10 −4 mm 3 ) to 0.19 μm (1.36 × 10 −4 mm 3 ) in pH 10 and from 0.67 μm (3.52 × 10 −4 mm 3 ) to 0.23 μm (1.46 × 10 −4 mm 3 ) in pH 13. This speed dependence of wear of SLS glass in different pH conditions (7, 10, and 13) is qualitatively similar to the effect of sliding speed on tribochemical wear of Si, Si 3 N 4 , GaAs, and RB‐SiC ceramics 38‐41 . The contribution of the friction‐induced local temperature rise at the sliding interface would be negligible, because the liquid water can act as a coolant removing frictional heat from the interface 42 …”

Section: Resultssupporting

confidence: 63%

“…This speed dependence of wear of SLS glass in different pH conditions (7, 10, and 13) is qualitatively similar to the effect of sliding speed on tribochemical wear of Si, Si 3 N 4 , GaAs, and RB-SiC ceramics. [38][39][40][41] The contribution of the friction-induced local temperature rise at the sliding interface would be negligible, because the liquid water can act as a coolant removing frictional heat from the interface. 42 Note that the wear depth of SLS glass in the aqueous solution is much smaller than that in dry air condition, 9 and the surface topography of SLS glass is much smoother (Figure 2A-C).…”

Section: Corrosion-wear Behaviors Of Sls Glass In Water and Basic Smentioning

confidence: 99%

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Synergy between surface mechanochemistry and subsurface dissolution on wear of soda lime silica glass in basic solution

Qiao

et al. 2020

J. Am. Ceram. Soc.

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The polishing of oxide glass in aqueous solution is sensitive to not only the mechanical conditions applied by abrasives but also the chemistry of solution. This study elucidates the synergistic interactions of mechanical and chemical effects-especially, the synergetic effects of surface mechanochemical wear and subsurface dissolution are studied by measuring the material removal rate of soda lime silica (SLS) glass upon rubbing with a Pyrex glass ball in noncorrosive (neutral pH) in corrosive solutions (pH 10 and 13 NaOH) as a function of sliding speed. Based on the synergetic model of surface wear and subsurface dissolution, it is found that the mechanochemical surface reaction dominates the wear behavior of SLS glass in neutral and pH 10 solution conditions; the wear of SLS glass in pH 10 is enhanced, compared to the neutral pH case, due to the presence of OHions at the sliding interface. In the case of pH 13, the dissolution of the densified subsurface region, which is formed due to interfacial friction during the surface wear, becomes significant, further enhancing the material removal yield. The finding provides an insight for designing an efficient polishing process in manufacturing of oxide glass materials with a good surface finish.

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Section: Resultssupporting

confidence: 63%

Section: Corrosion-wear Behaviors Of Sls Glass In Water and Basic Smentioning

confidence: 99%

Synergy between surface mechanochemistry and subsurface dissolution on wear of soda lime silica glass in basic solution

Qiao

et al. 2020

J. Am. Ceram. Soc.

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“…A similar relationship between the tribochemical wear rate and sliding speed was also reported in Refs. [151,152].…”

Section: Tribochemical Wear Facilitated By Interfacial Ice-like Watermentioning

confidence: 99%

Role of interfacial water in adhesion, friction, and wear—A critical review

Chen

Qian

2020

Friction

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Surficial water adsorption and interfacial water condensation as natural phenomena that can alter the contact status of the solid interface and tribological performances are crucial in all length scales, i.e., from earthquakes to skating at the macroscale level and even to micro/nano-electromechanical systems (M/NEMS) at the microscale/nanoscale level. Interfacial water exhibits diverse structure and properties from bulk water because of its further interaction with solid surfaces. In this paper, the evolutions of the molecular configuration of the adsorbed water layer depending on solid surface chemistry (wettability) and structure, environmental conditions (i.e., relative humidity and temperature), and experimental parameters (i.e., sliding speed and normal load) and their impacts on tribological performances, such as adhesion, friction, and wear, are systematically reviewed. Based on these factors, interfacial water can increase or reduce adhesion and friction as well as facilitate or suppress the tribochemical wear depending on the water condensation kinetics at the interface as well as the thickness and structure of the involved interfacial water.

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“…If the molecules adsorbed from the vapor phase are water, then tribochemical reactions can lead to the wear of solid surfaces. − Through model studies under well-controlled relative humidity (RH) conditions on silicon and silicon oxide surfaces, it was proposed that the formation of covalent bonds bridging the reactive sites of the two solid surfaces shearing relative to each other can facilitate such tribochemical wear . On hydroxylated silicon oxide surfaces, dehydroxylation reactions involving the Si–OH groups at the substrate and counter surfaces can lead to the formation of the Si substrate –O–Si counter_surface . , The impact of the formation of such interfacial bridging bonds is highly dependent on the surface chemistry and RH as well as the contact pressure and sliding speed during shear . Although tribochemical wear due to adsorbed water molecules is undesirable in most tribological interfaces, it has been suggested that it could be used as a new nanofabrication method for the chemical-free and mask-free etching of arbitrary shapes on silicon surfaces with an atomic-level depth resolution …”

Section: Introductionmentioning

confidence: 99%

Mechanochemical Reactions of Adsorbates at Tribological Interfaces: Tribopolymerizations of Allyl Alcohol Coadsorbed with Water on Silicon Oxide

Ngo

Kim

2019

Langmuir

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Mechanochemical reactions of adsorbed molecules at tribological interfaces can benefit or impede lubrication, depending on the type of reactions induced by the interfacial shear or friction. Shear-induced polymerization of oxidatively chemisorbed organic species can occur at tribological interfaces, and their products can mitigate the wear of the surface in the case of the intermittent cessation of the lubricant supply. In contrast, tribochemical reactions involving water molecules impinging from the ambient air could facilitate surface wear. In this study, we investigated how such processes are affected when a silicon oxide surface is exposed to the environment containing both water and polymerizable organic molecules. For the polymerizable organic moiety, allyl alcohol was chosen because it is known to have a good tribopolymerization activity and can compete with water for surface adsorption sites. The adsorbate composition can be divided into two regimes: water-rich and alcohol-rich. The tribopolymerization yield was found to be significantly enhanced, compared to the alcohol-only case, in both water-rich and alcohol-rich regimes. The coadsorbed water molecules appeared to be incorporated into the tribopolymerization product of allyl alcohol. The friction coefficient qualitatively correlated with the tribopolymerization yield. Surprisingly, a small degree of surface wear was observed in the alcohol-rich regime, although wear was completely suppressed in the water-rich regime and the alcohol-only condition. These results suggested that the wear prevention effect does not necessarily correlate with the tribopolymerization effects.

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Sliding Speed-Dependent Tribochemical Wear of Oxide-Free Silicon

Cited by 21 publications

References 33 publications

Synergy between surface mechanochemistry and subsurface dissolution on wear of soda lime silica glass in basic solution

Synergy between surface mechanochemistry and subsurface dissolution on wear of soda lime silica glass in basic solution

Role of interfacial water in adhesion, friction, and wear—A critical review

Mechanochemical Reactions of Adsorbates at Tribological Interfaces: Tribopolymerizations of Allyl Alcohol Coadsorbed with Water on Silicon Oxide

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