Direct observation of electron-beam-induced densification and hardening of silica nanoballs by in situ transmission electron microscopy and finite element method simulations

Mackovic M, Niekiel F, Wondraczek L, Spiecker E (2014)

Publication Status: Published

Publication Type: Journal article

Publication year: 2014

Journal

Acta Materialia Elsevier

Publisher: Elsevier

Book Volume: 79

Pages Range: 363-373

DOI: 10.1016/j.actamat.2014.05.046

Abstract

We report on the use of in situ transmission electron microscopy techniques and finite element method simulations to study the influence of electron beam irradiation on the deformation behavior and mechanical properties of nanoscale amorphous silica balls. We show that, on the nanometer scale, electron beam irradiation of silica results in athermal densification and simultaneous material hardening. It is demonstrated how the amount of densification can be controlled via the irradiation dose, using specific beam current densities inside a transmission electron microscope. The electron-beam-induced densification is interpreted as the direct reason for the observed hardening effect. Finite element method simulations are used to model the mechanical response of the silica balls, confirming that the intrinsic properties (such as the Young's modulus) of amorphous silica can be tailored with the electron beam on the nanoscale. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Authors with CRIS profile

Mirza Mackovic Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Florian Niekiel Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Lothar Wondraczek
Erdmann Spiecker Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)

Additional Organisation(s)

Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM) Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden Exzellenz-Cluster Engineering of Advanced Materials

Involved external institutions

Friedrich-Schiller-Universität Jena DE Germany (DE)

How to cite

APA:

Mackovic, M., Niekiel, F., Wondraczek, L., & Spiecker, E. (2014). Direct observation of electron-beam-induced densification and hardening of silica nanoballs by in situ transmission electron microscopy and finite element method simulations. Acta Materialia, 79, 363-373. https://doi.org/10.1016/j.actamat.2014.05.046

MLA:

Mackovic, Mirza, et al. "Direct observation of electron-beam-induced densification and hardening of silica nanoballs by in situ transmission electron microscopy and finite element method simulations." Acta Materialia 79 (2014): 363-373.

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