Formation of Mg-Cu-Ni-Ag-Zn-Y-Gd bulk glassy alloy by casting into cone-shaped copper mold in air atmosphere

E. S. Park, D. H. Kim

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)

Abstract

A new Mg-Cu-Ni-Ag-Zn-Y-Gd alloy with significantly improved glass forming ability (GFA) was developed in this work. Mg65Cu7.5 Ni7.5Ag5Zn5 Y5Gd5 bulk metallic glass (BMG) with a diameter of 14 mm was successfully fabricated by conventional copper mold casting method in air atmosphere. The critical cooling rate for glass formation was estimated to be about 20 K/s. When the maximum diameter for glass formation was compared with those previously reported for Mg-based alloys, the Mg65Cu7.5 Ni7.5Ag5Zn5 Y5Gd5 alloy showed the highest GFA. However, when the GFA was compared with those of Mg-TM-RE alloys (TM: Cu, Ni, Zn, and Ag; RE: Y and Gd), the significant improved GFA of the Mg-Cu-Ni-Zn-Ag-Y-Gd alloy cannot be properly represented by ΔTx, Trg, K, and γ parameters. In contrast to most of the Mg-based BMGs reported so far, the Mg65Cu7.5 Ni7.5Ag5Zn5 Y5Gd5 BMG exhibits yielding and plastic deformation during compressive loading.

Original languageEnglish
Pages (from-to)1465-1469
Number of pages5
JournalJournal of Materials Research
Volume20
Issue number6
DOIs
Publication statusPublished - 2005 Jun

Bibliographical note

Funding Information:
This work was supported by the Creative Research Initiatives of the Korean Ministry of Science and Technology.

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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