Thermal and mechanical characterizations of a Zr-based bulk metallic glass composite toughened by in-situ precipitated Ta-rich particles

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • J.S.C. Jang
  • S.R. Jian
  • D.J. Pan
  • Y.H. Wu
  • T.G. Nieh

Detail(s)

Original languageEnglish
Pages (from-to)560-564
Journal / PublicationIntermetallics
Volume18
Issue number4
Online published4 Nov 2009
Publication statusPublished - Apr 2010
Externally publishedYes

Abstract

The Zr53Cu30-xNi9Al8Tax (x = 2, 4, 6, 8) bulk metallic glass composites (BMGCs) rods with a diameter of 2-4 mm have been successfully fabricated by suction casting method in this study. The thermal and the mechanical properties of these Zr-based BMGCs were systematically investigated by the combination of DSC, XRD, SEM, TEM, and compression test. The results show that a superior mechanical performance with up to 30% compressive plastic strain, 1750 MPa yield strength and 2100 MPa fracture strength at room temperature can be obtained for the 2 mm diameter rod of the Zr53Cu22Ni9Al8Ta8 BMGC. There are two kinds of in-situ dispersed Ta-rich particles, micro-sized (10-30 μm), and nano-sized (20-80 nm) were found homogeneously distributed in the amorphous matrix. These Ta-rich particles act as discrete obstacles in the amorphous matrix, which separates and restricts the highly localized shear-banding, avoiding shear-through of the whole sample. This results in the formation of multiple shear bands around the Ta-rich particles and decreases the stress concentration for further propagation of shear band, and so as to enhance plasticity dramatically. In addition, the Ta-added BMG also exhibits similar GFA in comparison with the base BMG.

Research Area(s)

  • A. Composites, A. Metallic glasses, B. Mechanical properties at ambient temperature, B. Thermal Properties, F. Electron microscopy, transmission

Citation Format(s)

Thermal and mechanical characterizations of a Zr-based bulk metallic glass composite toughened by in-situ precipitated Ta-rich particles. / Jang, J.S.C.; Jian, S.R.; Pan, D.J.; Wu, Y.H.; Huang, J.C.; Nieh, T.G.

In: Intermetallics, Vol. 18, No. 4, 04.2010, p. 560-564.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review