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Thermal stability of the αZn-Mg2Zn11 and αZn-βAl eutectics obtained by Bridgman growth

  • H. Y. Liu*
  • , Y. Li
  • , H. Jones
  • *Corresponding author for this work
  • Singapore Polytechnic
  • National University of Singapore
  • University of Sheffield

Research output: Contribution to journalArticlepeer-review

Abstract

The thermal stability of rod-like αZn-Mg2Zn11 and lamellar αZn-βAl eutectics obtained by Bridgman growth of Zn-3.1 wt% Mg and Zn-5 wt% Al has been studied for soaking times up to 10 h at 300 and 350°C, respectively. Two-dimensional coarsening resulted for αZn-Mg2Zn11 grown at 0.5 and 1 mm s-1 while fault migration was operative for lamellar αZn-βAl grown at 0.1 and 1 mm s-1. Hardness decreased with increased soaking time according to a Hall Petch relationship with mean interphase spacing and the values H0 and kY accord well with the values obtained from the Hall Petch relationship for HV of as-solidified αZn-Mg2Zn11 and αZn-βAl with eutectic interphase spacing, respectively.

Original languageEnglish
Pages (from-to)1159-1164
Number of pages6
JournalJournal of Materials Science
Volume33
Issue number5
DOIs
StatePublished - 1998
Externally publishedYes

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