Self-repair by stress-induced diffusion of noble elements during oxidation of Zr48Cu36Al8Ag8 bulk metallic glass
| Autor: | Saber Haratian, Flemming Bjerg Grumsen, Matteo Villa, Thomas Lundin Christiansen, Marcel A. J. Somers |
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| Rok vydání: | 2019 |
| Předmět: |
Oxide zones characterization
Diffraction Long-term oxidation behavior Materials science Amorphous metal Mechanical Engineering Diffusion Stress induced Self repair Metals and Alloys Oxide Condensed Matter Physics Microstructure Tetragonal crystal system chemistry.chemical_compound In-situ X-ray diffraction chemistry Mechanics of Materials General Materials Science Composite material Zr-Cu-Al-Ag BMG |
| Zdroj: | Haratian, S, Grumsen, F B, Villa, M, Christiansen, T L & Somers, M A J 2019, ' Self-repair by stress-induced diffusion of noble elements during oxidation of Zr 48 Cu 36 Al 8 Ag 8 bulk metallic glass ', Scripta Materialia, vol. 164, pp. 126-129 . https://doi.org/10.1016/j.scriptamat.2019.01.045 |
| ISSN: | 1359-6462 |
| Popis: | Long-term oxidation behavior of Zr48Cu36Al8Ag8 BMG under atmospheric conditions at 600 K was investigated using in-situ X-ray diffraction analysis. Two oxide zones develop: an outer oxide zone (OOZ), consisting of a stratified distribution of CuOx, Ag, and ZrO2, and an inner oxide zone (IOZ) consisting of tetragonal ZrO2 showing Cu-enriched lines inclined to the surface. The stratified microstructure in the OOZ and the Cu enrichments in the IOZ are ascribed to micro-cracks resulting from the compressive stresses induced by ZrO2 formation. Segregation of noble elements towards these oxidation-generated free surfaces “repairs” the micro-cracks and can consistently explain the microstructural features. |
| Databáze: | OpenAIRE |
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