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 journal › peer-review
Author(s)
Detail(s)
Original language | English |
---|---|
Pages (from-to) | 560-564 |
Journal / Publication | Intermetallics |
Volume | 18 |
Issue number | 4 |
Online published | 4 Nov 2009 |
Publication status | Published - Apr 2010 |
Externally published | Yes |
Link(s)
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 journal › peer-review