Journal article
Isothermal oxidation of bulk dense Fe2AlB2 and Mn2AlB2 Phases in 700-1000 °C Temperature Range
Journal of the European Ceramic Society, v 45(1), 116801
Aug 2024
Abstract
Herein, the isothermal oxidation of Mn2AlB2 and Fe2AlB2 MAB phases in air was studied. When oxidized at 700 °C, the weight gain kinetics for Mn2AlB2 are sub-cubic up to 96h as a result of the formation of Mn2-xAlxO3. Severe spallation of the oxides was observed at 800 °C and 900 °C, limiting their service temperature. The oxidation kinetics at 900 °C, for Fe2AlB2 become sub-parabolic beyond 60h due to the formation of a passivating Αl4Β2Ο9 with excellent corner adherence at 900 °C. At both 800 °C and 1000 °C, the oxidation is rapid and severe. Therefore, both Mn2AlB2 and Fe2AlB2 may be used in practical application up to 700 °C and 900 °C, respectively. As far as we are aware, this is only the second transition metal boride that is oxidation resistant at 900 °C; the first, MoAlB, is also a MAB phase.
•Mn2AlB2 forms Mn1-xAlxO3 and follows sub-cubic oxidation kinetics at 700 °C.•Fe2AlB2 forms a passivating Al4B2O9 layer at 900 °C and follows sub-parabolic kinetics.•Mn2AlB2 shows spallation at 800 °C and 900 °C.•Fe2AlB2 remains oxidation resistant at 900 °C with excellent corner adherence.•Fe2AlB2 is the second known oxidation-resistant boride at 900 °C, after MoAlB.
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Details
- Title
- Isothermal oxidation of bulk dense Fe2AlB2 and Mn2AlB2 Phases in 700-1000 °C Temperature Range
- Creators
- Tarek Aly ElMeligy - Drexel UniversityOr Messer - Tel Aviv UniversityMaxim Sokol - Tel Aviv UniversityMary Qin Hassig - Drexel UniversityMichel W. Barsoum - Department of Materials Science & Engineering, Drexel University, Philadelphia, PA 19104, USA
- Publication Details
- Journal of the European Ceramic Society, v 45(1), 116801
- Publisher
- Elsevier
- Number of pages
- 9
- Grant note
- National Science Foundation, NSF, DMREF program: 1729335
This work was funded by the National Science Foundation, NSF, DMREF program (1729335) . The authors extend their thanks to S. Kota for sample preparation, data collection and consultation. The authors thank D.Barbash for assistance with the XRD hardware information.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:001297404100001
- Scopus ID
- 2-s2.0-85201109418
- Other Identifier
- 991021895617304721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Materials Science, Ceramics