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

S. W. Nam, W. T. Kim, D. H. 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

All Science Journal Classification (ASJC) codes

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

Fingerprint Dive into the research topics of 'Microstructure and corrosion behavior of rapidly solidified Mg-Zn-Y alloys'. Together they form a unique fingerprint.

  • Cite this