Gao, Shuang ; Zhao, Changhao ; Bohnen, Mattthias ; Müller, Ralf ; Rödel, Jürgen ; Kleebe, H.-J. (2023)
Precipitate-domain wall topologies in hardened Li-doped NaNbO.
In: Acta Materialia, 254
doi: 10.1016/j.actamat.2023.118998
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Ferroelectric hardening is an absolute requirement for potential applications of piezoceramics in high-power devices. A very recent work demonstrates that ferroelectric hardening by pinning domain walls with precipitates introduced during processing is feasible, akin to precipitation hardening in metals. With the precipitation of plate-like LiNbO3 in Li-doped NaNbO3 piezoceramics, ferroelectric hardening was achieved, exhibiting an enhanced mechanical quality factor (Qm). The specific morphology and corresponding orientation of the LiNbO3 platelets, exhibiting {110}PC habit planes, were characterized by transmission electron microscopy (TEM). The experimentally revealed crystallographic structures and strain incompatibility were found to correlate well with the thermodynamic simulation of the minimum-energy aspect ratio. In particular, the topology of the precipitate-domain wall assembly was clarified, revealing a full pinning on the domain walls by the incorporated plate-like precipitates. The revealed topology provides a fundamental basis for future optimization strategies for platelet hardening in new lead-free piezoceramics for high-power applications.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Gao, Shuang ; Zhao, Changhao ; Bohnen, Mattthias ; Müller, Ralf ; Rödel, Jürgen ; Kleebe, H.-J. |
| Art des Eintrags: | Bibliographie |
| Titel: | Precipitate-domain wall topologies in hardened Li-doped NaNbO |
| Sprache: | Englisch |
| Publikationsjahr: | 23 Mai 2023 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Acta Materialia |
| Jahrgang/Volume einer Zeitschrift: | 254 |
| Kollation: | 10 Seiten |
| DOI: | 10.1016/j.actamat.2023.118998 |
| Kurzbeschreibung (Abstract): | Ferroelectric hardening is an absolute requirement for potential applications of piezoceramics in high-power devices. A very recent work demonstrates that ferroelectric hardening by pinning domain walls with precipitates introduced during processing is feasible, akin to precipitation hardening in metals. With the precipitation of plate-like LiNbO3 in Li-doped NaNbO3 piezoceramics, ferroelectric hardening was achieved, exhibiting an enhanced mechanical quality factor (Qm). The specific morphology and corresponding orientation of the LiNbO3 platelets, exhibiting {110}PC habit planes, were characterized by transmission electron microscopy (TEM). The experimentally revealed crystallographic structures and strain incompatibility were found to correlate well with the thermodynamic simulation of the minimum-energy aspect ratio. In particular, the topology of the precipitate-domain wall assembly was clarified, revealing a full pinning on the domain walls by the incorporated plate-like precipitates. The revealed topology provides a fundamental basis for future optimization strategies for platelet hardening in new lead-free piezoceramics for high-power applications. |
| Freie Schlagworte: | piezoceramics, ferroelectric hardening, LiNbO3 precipitate, domain walls, topology |
| Zusätzliche Informationen: | Artikel-ID: 118998 |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe |
| Hinterlegungsdatum: | 24 Mai 2023 05:15 |
| Letzte Änderung: | 24 Mai 2023 05:15 |
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