Microstructure refining of aluminum alloys using aluminothermic reaction with ZnO nanoparticles

J. H. Shin, J. H. Jeon, D. H. Bae

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Abstract The wide popularities of grain refiner and modifier in aluminum alloy industry enable us to achieve improved properties and performances. Here, using aluminothermic reaction between nano-oxide particles (ZnO, ~20 nm in size) and aluminum alloy (A356), the microstructure refining effect on aluminum alloy is investigated. By the incorporation of nanoparticles with semi-solid melt treatment, the coarse primary aluminum dendritic microstructures are transformed to more fine and equiaxed structure showing improved mechanical properties. Converting mechanisms are interpreted in terms of the nucleation site increment, as well as the grain growth restriction, by decomposition and dissolution of the nano-oxide particles in aluminum alloy melt.

Original languageEnglish
Article number18642
Pages (from-to)96-99
Number of pages4
JournalMaterials Letters
Volume151
DOIs
Publication statusPublished - 2015 Jul 15

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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