Phase separation in Cu46Zr47-xAl7Gd x metallic glasses

Norbert Mattern, Ulla Vainio, Jin Man Park, Jun Hee Han, Ahmed Shariq, Do Hyang Kim, Jürgen Eckert

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

The influence of Gd addition on phase separation of rapidly quenched Cu46Zr47-xAl7Gdx metallic glasses (x = 2,5,7) was studied. For low Gd content (x = 2), a homogeneous glass is obtained for the as-quenched state. Annealing leads to cluster formation by nucleation and growth prior to crystallization. For the Gd contents x = 5 and 7, early stages of spinodal decomposition are observed in the as-quenched glasses. Further annealing increases the amplitude of the compositional fluctuations prior to crystallization. Atom probe tomography gives evidence of the presence of Gd-enriched clusters of 2-5 nm size for the Cu46Zr 42Al7Gd5 glass. The structure formation as a function of the Gd content is essentially determined by the composition dependence of the miscibility gap of the metastable undercooled melt. Early stages of spinodal decomposition or almost homogeneous glassy states are obtained if the critical temperature of liquid-liquid phase separation is close or below to the glass transition temperature.

Original languageEnglish
Pages (from-to)S23-S26
JournalJournal of Alloys and Compounds
Volume509
Issue numberSUPPL. 1
DOIs
Publication statusPublished - 2011 Jul 14

Bibliographical note

Funding Information:
Financial support of the Deutsche Forschungsgemeinschaft DFG (project Ma1531/10 ) is gratefully acknowledged. This work was supported by the Global Research Laboratory Program of the Korea Ministry of Education, Science and Technology .

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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