Acid polishing of lead glass

Ward, Jonathan A.; Fowler, A. C.; O’Brien, S.

doi:10.1186/2190-5983-1-1

Cited by 26 publications

(3 citation statements)

References 17 publications

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“…Before going further into detail, one must understand how the 3D shape of surface features evolve through dissolution. In the case of a homogeneous dissolution rate over the entire surface of the sample (case for a stress-free flat surface), the dissolution vector, at least at a supramolecular level, is applied perpendicularly to the surface. , For simplicity, we consider indentation imprints to be rather opened defects (surface curvature and mass transportation effects are neglected), and the postindentation residual stress effects on local dissolution rates are neglected. Thus, the magnitude of the dissolution rate is constant all over the surface and in the imprint as well.…”

Section: Resultsmentioning

confidence: 99%

Locally Enhanced Dissolution Rate as a Probe for Nanocontact-Induced Densification in Oxide Glasses

2012

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Atomic force microscopy (AFM) was used to characterize the surface damage (nanoindentations) effect on the chemical durability of glass surfaces (silica and soda-lime silicate glasses, WG). In basic solutions, an enhanced dissolution rate is reported and quantified at indentation sites (+10.5 nm/h and +52 nm/h for silica and WG, respectively) whereas none was observed once the indented surfaces were thermally annealed at 0.9 × T(g) for 2 h, a thermal treatment known for curing high pressure-induced permanent densification in oxides glasses. A direct link between high pressure-induced structural modifications encountered during nanoindentation and the measured dissolution rates is established. It is shown that this property conjointly used with the high resolution of the atomic force microscope may be used for probing, at the nanometer scale, the size and the nature of the structurally modified area underneath residual nanoindentation impressions. As an example, for 10 mN Vickers nanoindentations on WG, the zone affected by the permanently and structurally modified zone under the residual impression is found to be equal to (741 ± 30) nm with a transition zone thickness from the fully densified material to the elastically deformed one ranging between 115 and 165 nm.

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Section: Resultsmentioning

confidence: 99%

Locally Enhanced Dissolution Rate as a Probe for Nanocontact-Induced Densification in Oxide Glasses

2012

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“…If we neglect the spreading or diffusive aspect of the wavefront, it is possible to show that for large t and n w we have the asymptotic relationship [1]:…”

Section: Numerical Solutionmentioning

confidence: 99%

“…We now consider a slightly simpler system consisting of a solid comprising two species (j = 1,2), both of which are etched by an acid, but at different rates A 1 and A 2 which can in principle be related to the relevant chemical reaction rates [1].…”

Section: The Basic Modelmentioning

confidence: 99%