Controllable manipulation of crystallinity and morphology of aluminium surfaces using high intensity ultrasound

Anna Kollath, Pavel V. Cherepanov, Daria V. Andreeva

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7 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)190-194
Number of pages5
JournalApplied Acoustics
Volume103
Issue numberPart B
DOIs
Publication statusPublished - Feb 2016
Externally publishedYes

Keywords

  • Aluminium
  • Cavitation
  • Grain size
  • High intensity ultrasound
  • Metal surface

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