Jamin, Christine ; Rasp, Tobias ; Kraft, Torsten ; Guillon, Olivier (2013)
Constrained sintering of alumina stripe patterns on rigid substrates: Effect of stripe geometry.
In: Journal of the European Ceramic Society, 33 (15-16)
doi: 10.1016/j.jeurceramsoc.2013.06.016
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The sintering behaviour of alumina stripes deposited on sapphire substrates by micromolding in capillaries – a soft lithographic method – with lateral dimensions from 10 to 500 μm and thicknesses between 7 μm and 32 μm was studied. Unlike in continuous films, the lateral sintering strain is not negligible, thus reducing the constraint imposed by the substrate. Lateral shrinkage depends on the stripe width and thickness. The degree of constraint exerted on alumina stripes by a rigid sapphire substrate was investigated by comparing the lateral and vertical strains and is found to be dependent on stripe geometry. The formation of a delaminated, highly dense edge zone was observed at the free boundaries. Its influence on overall densification and local density distribution depends on its extension compared to the total film width. A gradient in local density was found that varied both with stripe thickness and width as predicted by finite element and discrete element simulations.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2013 |
| Autor(en): | Jamin, Christine ; Rasp, Tobias ; Kraft, Torsten ; Guillon, Olivier |
| Art des Eintrags: | Bibliographie |
| Titel: | Constrained sintering of alumina stripe patterns on rigid substrates: Effect of stripe geometry |
| Sprache: | Englisch |
| Publikationsjahr: | Dezember 2013 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the European Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 33 |
| (Heft-)Nummer: | 15-16 |
| DOI: | 10.1016/j.jeurceramsoc.2013.06.016 |
| Kurzbeschreibung (Abstract): | The sintering behaviour of alumina stripes deposited on sapphire substrates by micromolding in capillaries – a soft lithographic method – with lateral dimensions from 10 to 500 μm and thicknesses between 7 μm and 32 μm was studied. Unlike in continuous films, the lateral sintering strain is not negligible, thus reducing the constraint imposed by the substrate. Lateral shrinkage depends on the stripe width and thickness. The degree of constraint exerted on alumina stripes by a rigid sapphire substrate was investigated by comparing the lateral and vertical strains and is found to be dependent on stripe geometry. The formation of a delaminated, highly dense edge zone was observed at the free boundaries. Its influence on overall densification and local density distribution depends on its extension compared to the total film width. A gradient in local density was found that varied both with stripe thickness and width as predicted by finite element and discrete element simulations. |
| Freie Schlagworte: | Thick film; Simulation; Micromolding in capillaries; Constrained sintering; Alumina |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 18 Sep 2013 09:18 |
| Letzte Änderung: | 18 Sep 2013 09:18 |
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