Controllable manipulation of crystallinity and morphology of aluminium surfaces using high intensity ultrasound
| Autor: | Anna Kollath, Pavel V. Cherepanov, Daria V. Andreeva |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Acoustics and Ultrasonics Metallurgy chemistry.chemical_element Recrystallization (metallurgy) 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Grain size 0104 chemical sciences Corrosion Atomic diffusion Grain growth Crystallinity chemistry Aluminium Composite material 0210 nano-technology |
| Zdroj: | Applied Acoustics. 103:190-194 |
| ISSN: | 0003-682X |
| DOI: | 10.1016/j.apacoust.2015.06.016 |
| Popis: | High intensity ultrasound (HIUS) provides highly non-equilibrium condition for metal processing. Controllable manipulation of crystallinity and morphology of metal coatings is important for different applications including catalysis and corrosion protection. Investigation of effects of HIUS in different sonication media on microstructure and morphology of aluminium (Al) layers showed that HIUS can cause melting and recrystallization of Al. Due to high cooling rate the grain size of Al can be reduced. Ultrasonically induced structure refinement could potentially be used for enhancement of mechanical properties of coatings. If ultrasonically generated temperature is not high enough for metal melting, temperature induced atomic diffusion leads to grain growth, segregation and fragmentation of Al layers and, thus, the formation of attractive for catalytic application increased surface area. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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