Aminzare, M. ; Golestani-fard, F. ; Guillon, Olivier ; Mazaheri, Mehdi ; Rezaie, H. R. (2010)
Sintering behavior of an ultrafine alumina powder shaped by pressure filtration and dry pressing.
In: Materials Science and Engineering: A, 527 (16-17)
doi: 10.1016/j.msea.2010.03.051
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Master sintering curve (MSC) was used as a practical approach to analyse the sintering behavior of an ultrafine alumina powder. Non-isothermal sintering was carried out at three heating rates. The concept of the MSC has been used to investigate the effect of different shaping methods, i.e. dry pressing (DP) and pressure filtration (PF) on the apparent activation energy for sintering. Although no change in the dominant densification mechanism is expected, the interplay between different diffusion mechanisms taking place during the heating ramp may be affected by the shaping method. Values of 605 ± 15 and 700 ± 20 kJ/mol were determined for PF and DP samples, respectively. The lower activation energy for PF samples may be explained by the higher green density and homogeneity, smaller pore size in comparison with the DP samples. Furthermore, the mechanical properties (hardness and fracture toughness) of the samples are presented.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2010 |
| Autor(en): | Aminzare, M. ; Golestani-fard, F. ; Guillon, Olivier ; Mazaheri, Mehdi ; Rezaie, H. R. |
| Art des Eintrags: | Bibliographie |
| Titel: | Sintering behavior of an ultrafine alumina powder shaped by pressure filtration and dry pressing |
| Sprache: | Englisch |
| Publikationsjahr: | Juni 2010 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Materials Science and Engineering: A |
| Jahrgang/Volume einer Zeitschrift: | 527 |
| (Heft-)Nummer: | 16-17 |
| DOI: | 10.1016/j.msea.2010.03.051 |
| Kurzbeschreibung (Abstract): | Master sintering curve (MSC) was used as a practical approach to analyse the sintering behavior of an ultrafine alumina powder. Non-isothermal sintering was carried out at three heating rates. The concept of the MSC has been used to investigate the effect of different shaping methods, i.e. dry pressing (DP) and pressure filtration (PF) on the apparent activation energy for sintering. Although no change in the dominant densification mechanism is expected, the interplay between different diffusion mechanisms taking place during the heating ramp may be affected by the shaping method. Values of 605 ± 15 and 700 ± 20 kJ/mol were determined for PF and DP samples, respectively. The lower activation energy for PF samples may be explained by the higher green density and homogeneity, smaller pore size in comparison with the DP samples. Furthermore, the mechanical properties (hardness and fracture toughness) of the samples are presented. |
| Freie Schlagworte: | Alumina; Master sintering curve; Activation energy; Sintering |
| 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: | 20 Jun 2011 08:36 |
| Letzte Änderung: | 05 Mär 2013 09:48 |
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