Synchrotron radiographic studies of ultrasonic melt processing of metal matrix nano composites
| Autor: | Mirian Garcia-Fernandez, Peter D. Lee, Wenwu Xu, Wajira Mirihanage, Dmitry G. Eskin, Javier Tamayo-Ariztondo, Prakash Srirangam |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Ultrasonic cavitation Materials science Nano composites Mechanical Engineering Metallurgy 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Synchrotron law.invention Metal matrix nano composites Mechanics of Materials law 0103 physical sciences Aluminium General Materials Science European commission Composite material 0210 nano-technology Synchrotron radiography |
| Zdroj: | Materials Letters. 164:484-487 |
| ISSN: | 0167-577X |
| Popis: | Fast synchrotron radiography was used to investigate ultrasonic cavitation bubble formation and their dynamics during liquid metal processing of Al-Cu metal matrix nano composites (MMNC) in comparison with conventional alloys. The experimental observations showed enhanced cavitation potential in MMNC melts, due to the presence of Al2O3 nano particles which believed to be acting as heterogeneous nuclei for bubble formation. Quantitative image analysis demonstrates that the addition of nano particles increases melt agitation partially, while introducing higher flow velocity variations across the melt. This suggests that the presence of nano particles may substantially alter propensity for ultrasonic treatment effects during solidification processing of MMNCs. the ExoMet Project, which is co-funded by the European Commission in the 7th Framework Programme (contract FP7-NMP3-LA-2012-280421), by the European Space Agency and by the individual partner organisations. UK EPSRC grants (EP/I02249X/1, EP/K00588X/1, EP/K005804) and the Research Complex at Harwell. |
| Databáze: | OpenAIRE |
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