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

Fingerprint

refining
aluminum alloys
Refining
Aluminum alloys
Nanoparticles
nanoparticles
microstructure
Microstructure
Oxides
oxides
Aluminum
Grain growth
constrictions
dissolving
Dissolution
Nucleation
fine structure
industries
nucleation
mechanical properties

All Science Journal Classification (ASJC) codes

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

Cite this

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Microstructure refining of aluminum alloys using aluminothermic reaction with ZnO nanoparticles. / Shin, J. H.; Jeon, J. H.; Bae, D. H.

In: Materials Letters, Vol. 151, 18642, 15.07.2015, p. 96-99.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Shin, J. H.

AU - Jeon, J. H.

AU - Bae, D. H.

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N2 - 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.

AB - 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.

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