Instrumented indentation of fused silica by Berkovich indenter

Gao, Chen; Liu, Ming

doi:10.1016/j.jnoncrysol.2017.09.006

Cited by 62 publications

(29 citation statements)

References 76 publications

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“…The first group, having the highest mechanical properties (around 10 GPa), is composed of glasses, all poled under nitrogen: contact and non‐contact poled glasses as well as contact poled glass after a chemical test. The hardness value is comparable to those of fused silica tabulated between 9 and 10 GPa depending the authors 30,31 . The second group, composed of the reference and non‐contact air‐poled glasses before and after durability tests, shows hardness values around 8 GPa, which is comparable to soda lime silicate's hardness values reported in the literature 15,20 .…”

Section: Resultssupporting

confidence: 79%

“…The hardness value is comparable to those of fused silica tabulated between 9 and 10 GPa depending the authors. 30,31 The second group, composed of the reference and non-contact air-poled glasses before and after durability tests, shows hardness values around 8 GPa, which is comparable to soda lime silicate's hardness values reported in the literature. 15,20 The non-contact nitrogen poled glass after two days in saline waters exhibits an intermediate hardness.…”

Section: Chemical Durability and Mechanicalmentioning

confidence: 51%

“…One should point out that the hardness of the reinforced poled surfaces is close to the value of fused silica, tabulated between 9 and 10 GPa. 30,31 The hardness enhancement of the surface could be also related to the densification of the silica layer, as observed by GD-OES.…”

Section: Surface Properties Of Poled Glassesmentioning

confidence: 91%

See 2 more Smart Citations

Enhancement of mechanical properties and chemical durability of Soda‐lime silicate glasses treated by DC gas discharges

et al. 2020

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We report for the first time a study on non-contact thermal poling of soda lime silicate glasses using DC gas discharge. In this work, the formation of a glow discharge is evidenced during the thermal poling treatment (longer than 30 minutes). The hardness and the chemical durability of glasses poled under different conditions (contact or non-contact) and atmospheres (nitrogen or air) are measured and compared to that of un-poled reference glass. The results reveal enhanced mechanical and chemical properties for samples poled under nitrogen as compare to air poled or soda lime silicate glass samples. A structural and chemical analysis of surface of the glass using IR-reflectance measurement and ToF-SIMS is also presented. The formation of a "silica-like" layer on the surface of nitrogen poled glasses is observed, which is likely associated with the enhancement of surface properties. On the other hand, the introduction of protons beneath the surface of glasses poled under air leads to the formation of a hydrated alkaline earth silica layer. Based on the observations a mechanism behind the sustainability of the plasma under DC conditions is proposed. How to cite this article: Chazot M, Paraillous M, Jouannigot S, et al. Enhancement of mechanical properties and chemical durability of Soda-lime silicate glasses treated by DC gas discharges.

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Section: Resultssupporting

confidence: 79%

Section: Chemical Durability and Mechanicalmentioning

confidence: 51%

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Enhancement of mechanical properties and chemical durability of Soda‐lime silicate glasses treated by DC gas discharges

et al. 2020

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“…where E is the elastic modulus, and v is the Poisson's ratio of the MS (s) and the plate (p). The elastic modulus and Poisson's ratio are 73.3 GPa [41] and 0.17, [42] 25,30,35,40,45, and 50 mN, respectively. These pressures are higher than 1 GPa calculated in microscale superlubricity.…”

Section: Resultsmentioning

confidence: 99%

“…E* is described

E * = {([], (1 - v_{s}^{2}) / E_{s} + (1 - v_{p}^{2}) / E_{p})}^{- 1}

where E is the elastic modulus, and v is the Poisson's ratio of the MS (s) and the plate (p). The elastic modulus and Poisson's ratio are 73.3 GPa and 0.17, respectively. The r calculated is 331, 351, 370, 387, 402, and 417 nm under normal loads of 25, 30, 35, 40, 45, and 50 mN, respectively.…”

Section: Resultsmentioning

confidence: 99%

Macroscale Superlubricity Enabled by Graphene‐Coated Surfaces

Zhang

Huang

et al. 2020

Advanced Science

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Friction and wear remain the primary modes for energy dissipation in moving mechanical components. Superlubricity is highly desirable for energy saving and environmental benefits. Macroscale superlubricity was previously performed under special environments or on curved nanoscale surfaces. Nevertheless, macroscale superlubricity has not yet been demonstrated under ambient conditions on macroscale surfaces, except in humid air produced by purging water vapor into a tribometer chamber. In this study, a tribological system is fabricated using a graphene‐coated plate (GCP), graphene‐coated microsphere (GCS), and graphene‐coated ball (GCB). The friction coefficient of 0.006 is achieved in air under 35 mN at a sliding speed of 0.2 mm s−1 for 1200 s in the developed GCB/GCS/GCP system. To the best of the knowledge, for the first time, macroscale superlubricity on macroscale surfaces under ambient conditions is reported. The mechanism of macroscale superlubricity is due to the combination of exfoliated graphene flakes and the swinging and sliding of the GCS, which is demonstrated by the experimental measurements, ab initio, and molecular dynamics simulations. These findings help to bridge macroscale superlubricity to real world applications, potentially dramatically contributing to energy savings and reducing the emission of carbon dioxide to the environment.

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A New Method of AFM‐Based Nanolithography Using Frequency Enhanced Electrochemical Pressure Solution Etching

Fraysse

MacLeod

Gates

et al. 2023

Adv Materials Technologies

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A new method of direct‐write nanolithography that is able to rapidly etch silica surfaces under a scanning atomic force microscopy (AFM) probe in tapping mode (TM) is reported. In this lithography technique, silica surfaces are etched using a recently described electro‐chemo‐mechanical phenomenon of frequency enhanced electrochemical pressure solution (FEEPS). In FEEPS, the tapping of the AFM tip generates oscillations of the Stern potential at the silica‐water interface that can accelerate the silica dissolution kinetics by more than 5–6 orders of magnitude when surface resonance states are achieved; i.e., when the oscillation frequency is in phase with the dynamics of interfacial chemical reaction steps. By scanning silica surfaces in TM, silica is selectively dissolved below the tapping tip as it is scanned. The FEEPS accelerated silica dissolution rates can generate etched features with depths of more than 60 nm in a single AFM tip pass. The rate of etching can be controlled easily by varying the scanning rate or by modulating the tapping frequency. This fine control over the silica etching process and because material is removed (dissolved) rather than displaced as with nanoscratching, the FEEPS process lends itself to gray‐scale nanolithography which is demonstrated.

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Instrumented indentation of fused silica by Berkovich indenter

Cited by 62 publications

References 76 publications

Enhancement of mechanical properties and chemical durability of Soda‐lime silicate glasses treated by DC gas discharges

Enhancement of mechanical properties and chemical durability of Soda‐lime silicate glasses treated by DC gas discharges

Macroscale Superlubricity Enabled by Graphene‐Coated Surfaces

A New Method of AFM‐Based Nanolithography Using Frequency Enhanced Electrochemical Pressure Solution Etching

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