Microstructure and corrosion behavior of rapidly solidified Mg-Zn-Y alloys

S. W. Nam, W. T. Kim, Do Hyang Kim, T. S. Kim

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The effect of a minor change in alloy composition on the microstructure and corrosion properties of melt spun Mg98.3-xZnxY 1.7 ribbons with x=9-12 is studied by X-ray diffractometry, differential scanning calorimetry, transmission electron microscopy and a dynamic polarization test. The ribbon specimens with x=9-10 revealed an in-situ composite microstructure consisting of icosahedral quasicrystalline phase (I-phase) particles distributed in an α-Mg matrix. The ribbon specimens with x=11 and 12 contained a minor MgZn2 phase together with an α-Mg phase and I-phase. With increasing Zn content, the corrosion potential increased because of a mixed potential effect, but the formation of a MgZn2 phase deteriorated the corrosion property through preferential attack, causing an irregular boundary between the corrosion product and the substrate. These results indicate that it is important to control alloy chemistry not to form the MgZn2 phase in developing an I-phase strengthened Mg-Zn-Y alloy for structural applications.

Original languageEnglish
Pages (from-to)205-209
Number of pages5
JournalMetals and Materials International
Volume19
Issue number2
DOIs
Publication statusPublished - 2013 Mar 1

Fingerprint

corrosion
Corrosion
ribbons
microstructure
Microstructure
X ray diffraction analysis
attack
Differential scanning calorimetry
heat measurement
chemistry
Polarization
Transmission electron microscopy
transmission electron microscopy
scanning
composite materials
Composite materials
Substrates
polarization
products
matrices

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Cite this

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Microstructure and corrosion behavior of rapidly solidified Mg-Zn-Y alloys. / Nam, S. W.; Kim, W. T.; Kim, Do Hyang; Kim, T. S.

In: Metals and Materials International, Vol. 19, No. 2, 01.03.2013, p. 205-209.

Research output: Contribution to journalArticle

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