Phase decomposition in a nanocrystalline CrCoNi alloy
| Autor: | Yujiao Li, Alfred Ludwig, Aleksander Kostka, Alan Savan |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Phase stability Mechanical Engineering Diffusion Alloy Metals and Alloys 02 engineering and technology Atom probe engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Decomposition Nanocrystalline material law.invention Mechanics of Materials law Transmission electron microscopy Chemical physics Phase (matter) 0103 physical sciences engineering General Materials Science 0210 nano-technology |
| Zdroj: | Scripta Materialia. 188:259-263 |
| ISSN: | 1359-6462 |
| Popis: | Phase stability of a nanocrystalline CrCoNi alloy is investigated using the combinatorial processing platform approach, which enables synthesis, processing and direct atomic-scale characterizations of alloys by atom probe tomography and transmission electron microscopy. Phase decomposition with formation of CoNi-rich phase occurs faster in the smaller (10 nm) grain-sized region than the larger one (20 nm), both being present in the same sample. Chemical analyses indicate that diffusion of Co and Cr plays an important role in phase decomposition. Comparison of phase stability between CrMnFeCoNi and CrCoNi implies that elemental segregation may promote phase decomposition by providing an additional chemical driving force for it. |
| Databáze: | OpenAIRE |
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