Effects of density difference of constituent elements on glass formation in TiCu-based bulk metallic glasses

Zhongyan Zhang, Zengbao Jiao, Jie Zhou, Yuan Wu, Hui Wang, Xiongjun Liu, Zhaoping Lu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)

Abstract

Glass formation is generally favored by a large atomic size mismatch among constituent elements, which usually leads to large density differences among them as well. During melting, elemental segregation occurs due to Stokes’ law and then inevitably affects glass formation. In this paper, such effects on glass-forming ability in a TiCu-based alloy system have been demonstrated. In the bulk glass-forming composition Ti43Cu42Hf14Si1, macroscopic segregation of Si was observed in the as-melted ingots and silicon was completely depleted in the as-cast rods. In another Ti33Cu47Ni8Zr11Si1 alloy, nevertheless, the effects of density differences among the constituent elements were less severe. It was also confirmed that using proper pre-alloys could be an effective way in alleviating the side effects of the elemental segregation.

Original languageEnglish
Pages (from-to)469-474
Number of pages6
JournalProgress in Natural Science: Materials International
Volume23
Issue number5
DOIs
Publication statusPublished - Oct 2013
Externally publishedYes

Keywords

  • Bulk metallic glass
  • Glass forming ability
  • Microalloying
  • Pre-alloy
  • Segregation

ASJC Scopus subject areas

  • Materials Science(all)

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