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Mechnich, Peter und Schneider, Hartmut (2008) Reaction bonding of Mullite (RBM) in Presence of Scandia Sc2O3. Journal of the European Ceramic Society, 28 (2), Seiten 473-478. Elsevier. doi: 10.1016/j.jeurceramsoc.2007.03.010.
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Kurzfassung
The presence of 3<sup>rd</sup> group transition metal oxides yttria and lanthana has a strong accelerating influence on the reaction bonding of mullite (RBM) from silicon and alpha-alumina, even at temperatures below 1350°C. This is due to the formation of a low-viscosity transient liquid phases enhancing Si-oxidation, alumina diffusion and mullite nucleation and growth. The presence of the 3<sup>rd</sup> group transition metal oxide scandia (Sc<sub>2</sub>O<sub>3</sub>) does not show a significant influence on the RBM process up to 1350°C. Sc<sub>2</sub>O<sub>3</sub> does not form low viscous Sc-Al-Si-O liquid phases which enhance reactivity. Instead, a direct formation of Sc-disilicate Sc<sub>2</sub>Si<sub>2</sub>O<sub>7</sub> is observed. At temperatures between 1350°C and 1550°C, a slightly enhanced mullite formation due to accelerated solid state diffusion, and the formation of a ternary Sc-rich aluminosilicate is evident.
| elib-URL des Eintrags: | https://elib.dlr.de/51795/ | ||||||||||||
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| Dokumentart: | Zeitschriftenbeitrag | ||||||||||||
| Titel: | Reaction bonding of Mullite (RBM) in Presence of Scandia Sc2O3 | ||||||||||||
| Autoren: |
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| Datum: | 2008 | ||||||||||||
| Erschienen in: | Journal of the European Ceramic Society | ||||||||||||
| Referierte Publikation: | Ja | ||||||||||||
| Open Access: | Nein | ||||||||||||
| Gold Open Access: | Nein | ||||||||||||
| In SCOPUS: | Nein | ||||||||||||
| In ISI Web of Science: | Ja | ||||||||||||
| Band: | 28 | ||||||||||||
| DOI: | 10.1016/j.jeurceramsoc.2007.03.010 | ||||||||||||
| Seitenbereich: | Seiten 473-478 | ||||||||||||
| Verlag: | Elsevier | ||||||||||||
| Status: | veröffentlicht | ||||||||||||
| Stichwörter: | mullite, reaction-bonding, scandia | ||||||||||||
| HGF - Forschungsbereich: | Verkehr und Weltraum (alt) | ||||||||||||
| HGF - Programm: | Luftfahrt | ||||||||||||
| HGF - Programmthema: | Antriebe (alt) | ||||||||||||
| DLR - Schwerpunkt: | Luftfahrt | ||||||||||||
| DLR - Forschungsgebiet: | L ER - Antriebsforschung | ||||||||||||
| DLR - Teilgebiet (Projekt, Vorhaben): | L - Brennkammertechnologien (alt) | ||||||||||||
| Standort: | Köln-Porz | ||||||||||||
| Institute & Einrichtungen: | Institut für Werkstoff-Forschung > Keramische Struktur- und Funktionswerkstoffe | ||||||||||||
| Hinterlegt von: | Mechnich, Dr.rer.nat. Peter | ||||||||||||
| Hinterlegt am: | 16 Nov 2007 | ||||||||||||
| Letzte Änderung: | 27 Apr 2009 14:28 |
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