at Google ScholarTitle data
Ulrich, Anke Silvia ; Kasatikov, Sergey ; König, Till ; Fantin, Andrea ; Margraf, Johannes T. ; Galetz, Mathias:
Decreased Metal Dusting Resistance of Ni-Cu Alloys by Fe and Mn Additions.
In: High Temperature Corrosion of Materials.
(2024)
.
ISSN 2731-8400
DOI: https://doi.org/10.1007/s11085-024-10263-w
Abstract in another language
Ni-Cu alloys are promising for application at temperatures between 400–900 °C and reducing atmospheres with high C-contents. Typically, under such conditions, metallic materials in contact with the C-rich atmosphere are degraded by a mechanism called metal dusting (MD). Ni-Cu-alloys do not form protective oxide scales, but their resistance is attributed to Cu, which catalytically inhibits the C-deposition on the surface. Adding other alloying elements, such as Mn or Fe, was found to enhance the MD attack of Ni-Cu alloys again. In this study, the effect of the Mn and Fe is divided into two affected areas: the surface and the bulk. The MD attack on binary Ni-Cu alloys, model alloys with Fe and Mn additions, and commercial Monel Alloy 400 is experimentally demonstrated. The surface electronic structure causing the adsorption and dissociation of C-containing molecules is investigated for model alloys. Analytical methods such as scanning electron microscopy combined with energy-dispersive X-ray spectroscopy, electron probe microanalysis combined with wavelength-dispersive X-ray spectroscopy, X-ray diffraction analysis, and near-edge X-ray absorption fine structure measurements were used. The results are correlated to CALPHAD calculations and atomistic simulations combining density functional theory calculations and machine learning. It is found that the Cu content plays a significant role in the surface reaction. The effect of Mn and Fe is mainly attributed to oxide formation. A mechanism explaining the enhanced attack by adding both Fe and Mn is proposed.
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| Institutions of the University: | Faculties > Faculty of Engineering Science > Chair Metals and Alloys > Chair Metals and Alloys - Univ.-Prof. Dr.-Ing. Uwe Glatzel Profile Fields > Advanced Fields Profile Fields > Advanced Fields > Advanced Materials Research Institutions Research Institutions > Central research institutes Research Institutions > Central research institutes > Bayreuth Center for Material Science and Engineering - BayMAT |
| Result of work at the UBT: | Yes |
| DDC Subjects: | 000 Computer Science, information, general works 600 Technology, medicine, applied sciences 600 Technology, medicine, applied sciences > 620 Engineering |
| Date Deposited: | 19 Aug 2024 07:02 |
| Last Modified: | 19 Aug 2024 07:02 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/90218 |