Gao, Shuang ; Zhao, Changhao ; Bohnen, Matthias ; Müller, Ralf ; Rödel, Jürgen ; Kleebe, Hans-Joachim (2023)
Precipitate-domain wall topologies in hardened Li-doped NaNbO3.
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 pre cipitates introduced during processing is feasible, akin to precipitation hardening in metals. With the precipi tation 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 to pology 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, Matthias ; Müller, Ralf ; Rödel, Jürgen ; Kleebe, Hans-Joachim |
| Art des Eintrags: | Bibliographie |
| Titel: | Precipitate-domain wall topologies in hardened Li-doped NaNbO3 |
| Sprache: | Englisch |
| Publikationsjahr: | August 2023 |
| Ort: | Amsterdam |
| 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 pre cipitates introduced during processing is feasible, akin to precipitation hardening in metals. With the precipi tation 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 to pology 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. |
| ID-Nummer: | Artikel-ID: 118998 |
| Fachbereich(e)/-gebiet(e): | 13 Fachbereich Bau- und Umweltingenieurwissenschaften 13 Fachbereich Bau- und Umweltingenieurwissenschaften > Fachgebiete der Mechanik 13 Fachbereich Bau- und Umweltingenieurwissenschaften > Fachgebiete der Mechanik > Fachgebiet Kontinuumsmechanik |
| Hinterlegungsdatum: | 15 Okt 2024 07:57 |
| Letzte Änderung: | 15 Okt 2024 07:59 |
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