Scherf, A. ; Janda, D. ; Baghaie Yazdi, M. ; Li, X. ; Stein, F. ; Heilmaier, M. (2015)
Oxidation Behavior of Binary Aluminium-Rich Fe–Al Alloys with a Fine-Scaled, Lamellar Microstructure.
In: Oxidation of Metals
doi: 10.1007/s11085-015-9535-6
Article, Bibliographie
Abstract
The oxidation behavior of binary Fe–Al alloys with an aluminum content between 58 and 64 at.% was studied by isothermal and cyclic oxidation experiments in a temperature range of 900–1000 °C. The parabolic rate constants were determined to be comparable to those of B2-ordered Fe–48Al. All investigated alloys exhibited a fine-scaled, lamellar microstructure (<300 nm lamellar spacing), which was a result of the eutectoid decomposition of the high-temperature phase Fe5Al8 into FeAl and FeAl2. None of these two phases showed a preferential oxidation. At 900 °C θ-Al2O3 formed, whereas at 1000 °C a transformation of the initially formed θ-Al2O3 to the slower growing and passivating α-Al2O3 was confirmed by grazing incidence X-ray diffraction measurements.
| Item Type: | Article |
|---|---|
| Erschienen: | 2015 |
| Creators: | Scherf, A. ; Janda, D. ; Baghaie Yazdi, M. ; Li, X. ; Stein, F. ; Heilmaier, M. |
| Type of entry: | Bibliographie |
| Title: | Oxidation Behavior of Binary Aluminium-Rich Fe–Al Alloys with a Fine-Scaled, Lamellar Microstructure |
| Language: | English |
| Date: | 2015 |
| Publisher: | Springer US |
| Journal or Publication Title: | Oxidation of Metals |
| DOI: | 10.1007/s11085-015-9535-6 |
| Abstract: | The oxidation behavior of binary Fe–Al alloys with an aluminum content between 58 and 64 at.% was studied by isothermal and cyclic oxidation experiments in a temperature range of 900–1000 °C. The parabolic rate constants were determined to be comparable to those of B2-ordered Fe–48Al. All investigated alloys exhibited a fine-scaled, lamellar microstructure (<300 nm lamellar spacing), which was a result of the eutectoid decomposition of the high-temperature phase Fe5Al8 into FeAl and FeAl2. None of these two phases showed a preferential oxidation. At 900 °C θ-Al2O3 formed, whereas at 1000 °C a transformation of the initially formed θ-Al2O3 to the slower growing and passivating α-Al2O3 was confirmed by grazing incidence X-ray diffraction measurements. |
| Uncontrolled Keywords: | FeAl, FeAl2, Oxidation, Microstructure |
| Divisions: | 11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences |
| Date Deposited: | 21 Apr 2015 10:53 |
| Last Modified: | 21 Apr 2015 10:53 |
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