Materials Map

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The Materials Map is an open tool for improving networking and interdisciplinary exchange within materials research. It enables cross-database search for cooperation and network partners and discovering of the research landscape.

The dashboard provides detailed information about the selected scientist, e.g. publications. The dashboard can be filtered and shows the relationship to co-authors in different diagrams. In addition, a link is provided to find contact information.

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The Materials Map is still under development. In its current state, it is only based on one single data source and, thus, incomplete and contains duplicates. We are working on incorporating new open data sources like ORCID to improve the quality and the timeliness of our data. We will update Materials Map as soon as possible and kindly ask for your patience.

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in Cooperation with on an Cooperation-Score of 37%

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Publications (1/1 displayed)

  • 2000Effect of the initial stages of leaching on the surface of alkaline earth sodium silicate glasses38citations

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Koenderink, G. H.
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Balkenende, Ruud
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2000

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  • Koenderink, G. H.
  • Balkenende, Ruud
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article

Effect of the initial stages of leaching on the surface of alkaline earth sodium silicate glasses

  • Koenderink, G. H.
  • Brzesowsky, R. H.
  • Balkenende, Ruud
Abstract

<p>The effect of the nature of the alkaline earth cation R (R = Mg, Ca, Sr or Ba) on the chemical composition, structure and mechanical properties of the surface of leached (RO)<sub>15</sub> (Na<sub>2</sub>O)<sub>15</sub> (SiO<sub>2</sub>)<sub>70</sub> glasses has been investigated during the initial stages of interaction with water. The glasses were leached by immersion in deionized water, at near neutral pH, at different temperatures, and for different periods of time. Compositional analysis was carried out using several depth profiling techniques, viz., RBS, ERD and SIMS. The chemical bonding state of the glass was investigated using Fourier-transform infrared (FTIR) reflection spectroscopy. UV-VIS reflection spectroscopy was used to study the optical properties of the glass surface. The Ba and Ca glasses were subjected to Vickers indentation at different loads to study the effect of leaching on the mechanical properties of the glass surface. For all glasses, the H penetration depth after leaching is shown to be approximately equal to the depletion depth of Na. The Na depletion and H penetration depths generally increase with leaching temperature and time. For Ba and Sr glasses, Ba and Sr cations are depleted to the same extent as Na. However, for Ca and Mg glasses, depletion of Ca and Mg is shown to be negligible as compared to Na depletion. The Na depletion depth is similar for the Sr, Ca and Mg glasses while much larger for Ba glass. In addition, Ba glass indented after immersion yields a larger indentation diagonal length and a lower corresponding Vickers hardness in comparison with Ba glass indented before immersion. Moreover, Ba glass exhibits a larger increase in radial crack size after immersion in water in comparison with Ca glass. On this basis, it is inferred that the mechanical properties of the Ba glass surface after leaching are controlled by the Ba and Na depletion depth.</p>

Topics
  • impedance spectroscopy
  • surface
  • glass
  • glass
  • crack
  • Sodium
  • hardness
  • chemical composition
  • leaching
  • selective ion monitoring
  • Rutherford backscattering spectrometry