Zr-based bulk metallic glass composite with in situ precipitated nanocrystals

Shengli Zhu, Guoqiang Xie, Hao Wang, Xianjin Yang, Zhenduo Cui, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The authors report the formation of Zr56Co22Al 16Ag6 bulk metallic glass composites with in situ formed ultrafine nano precipitates, which are made by copper mold casting over a range of rod diameters from 2 to 20 mm. The precipitated phases were identified to be a mixture of ZrAl-type and AlZr2-type phases with a grain size smaller than 5 nm. With increasing alloy rod diameter, the grain sizes of nanocrystals exhibit little change, while the volume fraction of nanocrystals increases. The large separation between the nucleation rate maximum and the growth rate maximum temperatures is proposed to mainly account for the ultrafine nanograin size and high nucleation rate, and the alloying effects of Ag are discussed for understanding the viscosity behavior changes of the Zr-Co-Al alloy melt. The present system is expected to be useful for studying the formation mechanism of bulk metallic glass nanocomposites in the liquid cooling process.

Original languageEnglish
Pages (from-to)155-158
Number of pages4
JournalJournal of Alloys and Compounds
Volume586
DOIs
Publication statusPublished - 2014

Keywords

  • Composite materials
  • Metallic glasses
  • Microstructure
  • Rapid-solidification
  • Thermal analysis

ASJC Scopus subject areas

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

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