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Room Temperature Viscous Flow of Amorphous Silica Induced by Electron Beam Irradiation

Bruns, Sebastian ; Minnert, Christian ; Pethö, Laszlo ; Michler, Johann ; Durst, Karsten (2023)
Room Temperature Viscous Flow of Amorphous Silica Induced by Electron Beam Irradiation.
In: Advanced Science, 2023, 10 (7)
doi: 10.26083/tuprints-00023715
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Room Temperature Viscous Flow of Amorphous Silica Induced by Electron Beam Irradiation
Language: English
Date: 27 November 2023
Place of Publication: Darmstadt
Year of primary publication: 2023
Place of primary publication: Weinheim
Publisher: Wiley-VCH
Journal or Publication Title: Advanced Science
Volume of the journal: 10
Issue Number: 7
Collation: 9 Seiten
DOI: 10.26083/tuprints-00023715
Corresponding Links:
Origin: Secondary publication DeepGreen

The increasing use of oxide glasses in high‐tech applications illustrates the demand of novel engineering techniques on nano‐ and microscale. Due to the high viscosity of oxide glasses at room temperature, shaping operations are usually performed at temperatures close or beyond the point of glass transition Tg. Those treatments, however, are global and affect the whole component. It is known from the literature that electron irradiation facilitates the viscous flow of amorphous silica near room temperature for nanoscale components. At the micrometer scale, however, a comprehensive study on this topic is still pending. In the present study, electron irradiation inducing viscous flow at room temperature is observed using a micropillar compression approach and amorphous silica as a model system. A comparison to high temperature yielding up to a temperature of 1100 °C demonstrates that even moderate electron irradiation resembles the mechanical response of 600 °C and beyond. As an extreme case, a yield strength as low as 300 MPa is observed with a viscosity indicating that Tg has been passed. Those results show that electron irradiation‐facilitated viscous flow is not limited to the nanoscale which offers great potential for local microengineering.

Uncontrolled Keywords: amorphous silica, electron beam irradiation, high temperature testing, micropillar compression, nanoindentation, viscosity
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-237155
Classification DDC: 500 Science and mathematics > 530 Physics
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Physical Metallurgy
Date Deposited: 27 Nov 2023 14:07
Last Modified: 05 Jan 2024 08:14
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/23715
PPN: 514461845
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