Tracer diffusion in the σ phase of the CoCrFeMnNi system
| Autor: | Guillaume Laplanche, Jingfeng Zhang, Benjamin Butz, Yordan Kalchev, Sven Hilke, Sergiy V. Divinski, Alex Asabre, Julian Müller, Gerhard Wilde, G. Mohan Muralikrishna, Harald Rösner |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Polymers and Plastics Isotope Diffusion Alloy Metals and Alloys Analytical chemistry Crystal structure engineering.material Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Tetragonal crystal system Phase (matter) Ceramics and Composites engineering Absolute zero Homologous temperature |
| Zdroj: | Acta Materialia. 203:116498 |
| ISSN: | 1359-6454 |
| DOI: | 10.1016/j.actamat.2020.116498 |
| Popis: | A single Cr-rich σ-phase alloy with a composition of Co17Cr46Fe16.3Mn15.2Ni5.5 (at.%) and a tetragonal lattice structure was produced. The tracer diffusion coefficients of Ni and Fe were measured by secondary ion mass spectroscopy using the highly enriched 64Ni and 58Fe natural isotopes. On the homologous temperature scale, Ni and Fe diffuse in the σ phase faster as compared to the corresponding diffusion rates in the equiatomic and face-centered cubic CoCrFeMnNi alloy. In contrast, on the absolute temperature scale, these elements diffuse roughly at the same rates in both materials. Factors influencing element diffusion and phase stability of the σ phase compared to the equiatomic alloy are discussed. |
| Databáze: | OpenAIRE |
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