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Chen, Haiyan und Zhao, Xinbing und Müller, Eckhard und Platzek, Dieter und Stiewe, Christian und Muchilo, Dmitry (2005) Phase transformation in Co-, Mn-, and Al-doped iron disilicide alloys. In: Proc. 24th Int. Conf. on Thermoelectrics (ICT 2005), Seiten 365-368. Institute of Electrical and Electronics Engineers, Inc.. ICT 2005 - 24th Int. Conf. on Thermoelectrics, 2005-06-19 - 2005-06-23, Clemson, SC (USA). ISBN 0-7803-9552-1. ISSN 1094-2734.
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Kurzfassung
The dynamic behaviour of phase transformation in β-FeSi<sub>2</sub> based thermoelectric materials Fe<sub>1-x</sub>M<sub>x</sub>Si<sub>2+y</sub> (M = Mn or Co) has been studied by using differential scanning calometry (DSC) and in situ high-temperature and high-pressure X-ray powder diffraction measurements (EDXRD) using synchrotron radiation. The investigated materials were powders prepared by rapid solidification (melt spinning). It’s found by DSC and EDXRD that the α+ε eutectic structures in the rapidly solidified alloys transform to β phase (α-Fe<sub>2</sub>Si<sub>5</sub> + ε-FeSi → β-FeSi<sub>2</sub>) in a lower temperature range below 700˚C. The formed β phase decomposes reversely to α and ε phase in a higher temperature range above 950˚C. The observed β formation temperature T<sub>1</sub> is greatly influenced by the heating rate. By EDXRD measurements, it is found that high pressures have a great influence on the phase transformation temperatures T<sub>1</sub> and T<sub>2</sub> (decomposition of β phase). Different doping elements (Mn, Co, or Al) have also great influence on the phase transformation temperature. EDXRD has simulated the process of hot uniaxial pressing.
| elib-URL des Eintrags: | https://elib.dlr.de/21381/ | ||||||||||||||||||||||||||||
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| Dokumentart: | Konferenzbeitrag (Vortrag, Paper) | ||||||||||||||||||||||||||||
| Titel: | Phase transformation in Co-, Mn-, and Al-doped iron disilicide alloys | ||||||||||||||||||||||||||||
| Autoren: |
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| Datum: | November 2005 | ||||||||||||||||||||||||||||
| Erschienen in: | Proc. 24th Int. Conf. on Thermoelectrics (ICT 2005) | ||||||||||||||||||||||||||||
| Referierte Publikation: | Ja | ||||||||||||||||||||||||||||
| Open Access: | Nein | ||||||||||||||||||||||||||||
| Gold Open Access: | Nein | ||||||||||||||||||||||||||||
| In SCOPUS: | Nein | ||||||||||||||||||||||||||||
| In ISI Web of Science: | Nein | ||||||||||||||||||||||||||||
| Seitenbereich: | Seiten 365-368 | ||||||||||||||||||||||||||||
| Herausgeber: |
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| Verlag: | Institute of Electrical and Electronics Engineers, Inc. | ||||||||||||||||||||||||||||
| ISSN: | 1094-2734 | ||||||||||||||||||||||||||||
| ISBN: | 0-7803-9552-1 | ||||||||||||||||||||||||||||
| Status: | veröffentlicht | ||||||||||||||||||||||||||||
| Stichwörter: | thermoelectric materials, iron disilicide, phase transition, high pressure | ||||||||||||||||||||||||||||
| Veranstaltungstitel: | ICT 2005 - 24th Int. Conf. on Thermoelectrics | ||||||||||||||||||||||||||||
| Veranstaltungsort: | Clemson, SC (USA) | ||||||||||||||||||||||||||||
| Veranstaltungsart: | internationale Konferenz | ||||||||||||||||||||||||||||
| Veranstaltungsbeginn: | 19 Juni 2005 | ||||||||||||||||||||||||||||
| Veranstaltungsende: | 23 Juni 2005 | ||||||||||||||||||||||||||||
| Veranstalter : | Clemson University, Dept. of Physics and Astronomy | ||||||||||||||||||||||||||||
| HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||||||
| HGF - Programm: | Luftfahrt | ||||||||||||||||||||||||||||
| HGF - Programmthema: | Antriebe (alt) | ||||||||||||||||||||||||||||
| DLR - Schwerpunkt: | Luftfahrt | ||||||||||||||||||||||||||||
| DLR - Forschungsgebiet: | L ER - Antriebsforschung | ||||||||||||||||||||||||||||
| DLR - Teilgebiet (Projekt, Vorhaben): | L - Virtuelles Triebwerk und Validierungsmethoden (alt) | ||||||||||||||||||||||||||||
| Standort: | Köln-Porz | ||||||||||||||||||||||||||||
| Institute & Einrichtungen: | Institut für Werkstoff-Forschung > Keramische Struktur- und Funktionswerkstoffe | ||||||||||||||||||||||||||||
| Hinterlegt von: | Müller, Dr.phys. Wolf Eckhard | ||||||||||||||||||||||||||||
| Hinterlegt am: | 23 Jan 2006 | ||||||||||||||||||||||||||||
| Letzte Änderung: | 24 Apr 2024 19:02 |
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