Azim, M.A. ; Gorr, B. ; Christ, H.-J. ; Lenchuk, O. ; Albe, K. ; Schliephake, D. ; Heilmaier, M.
:
Effect of Ti content and nitrogen on the high-temperature oxidation behavior of (Mo,Ti) 5 Si 3.
[Online-Edition: https://doi.org/10.1016/j.intermet.2017.05.023]
In:
Intermetallics, 90
pp. 103-112.
ISSN 09669795
[Artikel], (2017)
(Eingereicht)
Kurzbeschreibung (Abstract)
The binary intermetallic compounds Mo_5Si_3 (T1) and Ti_5Si_3 are prone to rapid oxidation below 1000 °C. Recent investigations on (Mo,Ti)_5Si_3, however, revealed that macro-alloying with 40 at.% Ti can result in a very good oxidation resistance in a wide temperature range (750–1300 °C) due to the formation of a duplex layer composed of a silica matrix with dispersed titania. Additionally, Ti decreases density making (Mo,Ti)_5Si_3 a promising key constituent of quaternary Mo-Si-B-Ti alloys considered for ultrahigh temperature structural applications. The aim of this study is to obtain an in-depth understanding of the influence of different Ti concentrations as well as of nitrogen on the oxidation behavior of (Mo,Ti)_5Si_3 at intermediate and elevated temperatures. The microstructure and oxidation mechanisms were analyzed using various experimental techniques. The experimental results were supported by ab initio and thermodynamic calculations.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2017 |
| Autor(en): | Azim, M.A. ; Gorr, B. ; Christ, H.-J. ; Lenchuk, O. ; Albe, K. ; Schliephake, D. ; Heilmaier, M. |
| Titel: | Effect of Ti content and nitrogen on the high-temperature oxidation behavior of (Mo,Ti) 5 Si 3 |
| Sprache: | Englisch |
| Kurzbeschreibung (Abstract): | The binary intermetallic compounds Mo_5Si_3 (T1) and Ti_5Si_3 are prone to rapid oxidation below 1000 °C. Recent investigations on (Mo,Ti)_5Si_3, however, revealed that macro-alloying with 40 at.% Ti can result in a very good oxidation resistance in a wide temperature range (750–1300 °C) due to the formation of a duplex layer composed of a silica matrix with dispersed titania. Additionally, Ti decreases density making (Mo,Ti)_5Si_3 a promising key constituent of quaternary Mo-Si-B-Ti alloys considered for ultrahigh temperature structural applications. The aim of this study is to obtain an in-depth understanding of the influence of different Ti concentrations as well as of nitrogen on the oxidation behavior of (Mo,Ti)_5Si_3 at intermediate and elevated temperatures. The microstructure and oxidation mechanisms were analyzed using various experimental techniques. The experimental results were supported by ab initio and thermodynamic calculations. |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Intermetallics |
| Band: | 90 |
| Freie Schlagworte: | Intermetallic compound, (Mo,Ti)5Si3, High-temperature oxidation behavior, Thermodynamic calculations, First-principles calculations |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialmodellierung Zentrale Einrichtungen > Hochschulrechenzentrum (HRZ) > Hochleistungsrechner 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft Zentrale Einrichtungen > Hochschulrechenzentrum (HRZ) 11 Fachbereich Material- und Geowissenschaften Zentrale Einrichtungen |
| Hinterlegungsdatum: | 08 Sep 2017 06:39 |
| Offizielle URL: | https://doi.org/10.1016/j.intermet.2017.05.023 |
| ID-Nummer: | doi:10.1016/j.intermet.2017.05.023 |
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