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Chen, Haiyan und Zhao, Xinbing und Jiang, J. Z. und Lathe, C. und Franz, H. und Karpinski, Gabriele und Müller, Eckhard (2005) Phase transformation of Co-, Mn-, and non-doped iron disilicide alloys under pressure. In: Proc. 3rd European Conf. Thermoelectrics, Ecole des Mines Nancy, FR, 2005, Seiten 138-141. ECT 2005 - 3rd European Conf. Thermoelectrics, 2005-09-01 - 2005-09-02, Nancy (FR).
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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/21356/ | ||||||||||||||||||||||||||||||||
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| Dokumentart: | Konferenzbeitrag (Paper, Poster) | ||||||||||||||||||||||||||||||||
| Titel: | Phase transformation of Co-, Mn-, and non-doped iron disilicide alloys under pressure | ||||||||||||||||||||||||||||||||
| Autoren: |
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| Datum: | 2 September 2005 | ||||||||||||||||||||||||||||||||
| Erschienen in: | Proc. 3rd European Conf. Thermoelectrics, Ecole des Mines Nancy, FR, 2005 | ||||||||||||||||||||||||||||||||
| Referierte Publikation: | Nein | ||||||||||||||||||||||||||||||||
| Open Access: | Nein | ||||||||||||||||||||||||||||||||
| Gold Open Access: | Nein | ||||||||||||||||||||||||||||||||
| In SCOPUS: | Nein | ||||||||||||||||||||||||||||||||
| In ISI Web of Science: | Nein | ||||||||||||||||||||||||||||||||
| Seitenbereich: | Seiten 138-141 | ||||||||||||||||||||||||||||||||
| Herausgeber: |
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| Status: | veröffentlicht | ||||||||||||||||||||||||||||||||
| Stichwörter: | thermoelectric materials, iron disilicide, phase transition, high pressure | ||||||||||||||||||||||||||||||||
| Veranstaltungstitel: | ECT 2005 - 3rd European Conf. Thermoelectrics | ||||||||||||||||||||||||||||||||
| Veranstaltungsort: | Nancy (FR) | ||||||||||||||||||||||||||||||||
| Veranstaltungsart: | internationale Konferenz | ||||||||||||||||||||||||||||||||
| Veranstaltungsdatum: | 2005-09-01 - 2005-09-02 | ||||||||||||||||||||||||||||||||
| Veranstalter : | INPL, Ecole des Mines Nancy, FR | ||||||||||||||||||||||||||||||||
| 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 - 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: | 27 Apr 2009 04:54 |
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