High-temperature oxidation behaviour of CoCrNi medium-entropy alloy
| Autor: | Nokeun Park, Unhae Lee, Maya Putri Agustianingrum |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
020209 energy General Chemical Engineering Alloy Analytical chemistry Oxide 02 engineering and technology General Chemistry Activation energy engineering.material 021001 nanoscience & nanotechnology Microstructure Corrosion chemistry.chemical_compound chemistry Initial phase Vacancy defect 0202 electrical engineering electronic engineering information engineering engineering General Materials Science 0210 nano-technology |
| Zdroj: | Corrosion Science. 173:108755 |
| ISSN: | 0010-938X |
| Popis: | The high-temperature oxidation behaviour of CoCrNi was investigated over different exposure times (6, 12, 24, and 48 h) at 900–1100 °C. The initial phase identification indicated that the tendency of oxide formation at 1100 °C was different after each exposure time. Microstructure observation demonstrated that Cr2O3 was mainly present at the interface of the oxide layer/base alloy, whereas CoCr2O4 and NiCr2O4 were identified near the outer oxide layer. The oxidation mechanism and the corresponding activation energy of CoCrNi were explained based on the slow diffusion of the Co, Cr, and Ni elements and the vacancy accumulation near the surface. |
| Databáze: | OpenAIRE |
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