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Solidification microstructures of Cu–Zr–Al–Y BMG produced by casting in a wedge-shaped copper mold

  • Ke Yang , Xinhui Fan , Bing Li , Yanhong Li and Xin Wang
Published/Copyright: February 22, 2017
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 108 Issue 3

Abstract

In this paper, Cu43Zr48Al9 and (Cu43Zr48Al9)98Y2 bulk metallic glasses were prepared by casting them in a wedge-shaped copper mold. X-ray diffraction, optical microscopy, scanning electron microscopy and transmission electron microscopy were used to analyze their microstructures. Wedge casting is an effective and flexible technique for exploring alloy solidification microstructures. The results demonstrate that the development of microstructural transitions is related to the thickness of the wedge-shaped samples. These microstructural transitions are represented by the appearance of altered microstructural morphologies as well as changes from one product structure to another. It is found that the crystal/glass transition occurs as a U-shape change in Cu-based wedge-shaped alloys. Further, the critical cooling rate of (Cu43Zr48Al9)98Y2 became lower than that of Cu43Zr48Al9 and that (Cu43Zr48Al9)98Y2 has a better glass forming ability. We developed practical strategies in microstructure control to extend our knowledge of phase competition leading to the successful synthesis of Cu-based metallic glass.

Keywords: Metallic glass; Wedge-shaped casting; Rapid solidification; Microstructure
*Correspondence address, Prof. Xinhui Fan, School of Material and Chemical Engineering, Xi'an Technological University, Xuefu Middle Road No. 2, Xi'an 710021, China, Tel.: +86-29-86173323, Fax: +86-29-86173323, E-mail:

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Received: 2016-09-25
Accepted: 2016-11-29
Published Online: 2017-02-22
Published in Print: 2017-03-13

© 2017, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111464
Keywords for this article
Metallic glass; Wedge-shaped casting; Rapid solidification; Microstructure

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Effect of grain defects on the mechanical behavior of nickel-based single crystal superalloy
  5. Evolution of mechanical properties and microstructure of differently cryogenically treated hot die steel AISI–H13
  6. Microstructure and mechanical properties of nickel particle reinforced magnesium composite: impact of reinforcement introduction method
  7. Microstructure and mechanical properties of carbon nanotube-reinforced ZK61 magnesium alloy composites prepared by spark plasma sintering
  8. Solidification microstructures of Cu–Zr–Al–Y BMG produced by casting in a wedge-shaped copper mold
  9. Energy spectrum analysis of anodic oxidation film surface–interface on 7475 aluminum alloy after salt spray corrosion
  10. Fabrication of Ni/SiC composite powder by mechanical alloying and its effects on properties of copper matrix composites
  11. The sintering behavior and physical properties of Li2CO3-doped Bi0.5(Na0.8K0.2)0.5TiO3 lead-free ceramics
  12. The effect of heating rate on the microstructural breakdown required for thixoformability
  13. Nano-particles in powder injection molding of an aluminum matrix composite: Rheological behavior, production and properties
  14. Short Communications
  15. Preparation of vaterite CaCO3 microspheres by fast precipitation method
  16. Slag corrosion resistance of Al4SiC4
  17. DGM News
  18. DGM News
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