Journal Article

FZJ-2019-03999

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Towards In-Situ Electron Microscopy Studies of Flash Sintering

Schwarzbach, D. ; Gonzalez, J.FZJ* ; Guillon, O.FZJ* ; Roddatis, V. ; Volkert, C. A. (Corresponding author)

2019
Informit Melbourne

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Please use a persistent id in citations: http://hdl.handle.net/2128/22534  doi:10.3390/ceramics2030036

Abstract: Flash sintering, a special case of electric field-assisted sintering, results in accelerated densification at lower temperatures than conventional sintering methods. However, the mechanisms remain elusive despite the wide application potential. In-situ electron microscopy studies reveal shrinkage of ZnO green bodies due to both heating and heating/biasing but show no obvious effect of the current on the behavior. In contrast, thin epitaxial ZnO films deposited on an Al2O3 substrate undergo a clear flash event during in-situ voltage application in the TEM, providing the first observation of flash sintering of a thin film. The specimen was captured in the high conductivity state where grain boundary motion was observed. The microscopic origins of the high conductivity state could not be detected, but may have the same underlying physical origin as the high conductivity memristive state.

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Contributing Institute(s):

1. Werkstoffsynthese und Herstellungsverfahren (IEK-1)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

Appears in the scientific report 2019

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Database coverage:
; ; Arts and Humanities Citation Index ; Clarivate Analytics Master Journal List ; Current Contents - Arts & Humanities ; Ebsco Academic Search ; SCOPUS

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