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Title: The detrimental effect of flux-induced boron alloying in Pd–Si–Cu bulk metallic glasses

We report on advanced insights into the fluxing of Pd–Si–Cu bulk metallic glasses. Flux-induced boron alloying and trapping of oxides are found to be associated with the employed boron oxide fluxing agent, and both influence the attainable glass-forming ability (GFA) in opposite ways. Incorporated boron strongly deteriorates the GFA due to a rising liquidus temperature, while the oxygen reduction improves it. Thus, proper fine-tuning of the fluxing time and overheating characteristics leads to an enhancement of GFA. In the current case, the critical diameter of Pd{sub 77.5}Si{sub 16.5}Cu{sub 6} bulk metallic glasses can be increased to 15 mm, as compared to 3 mm in the unfluxed case. Based on these results, we illustrate that the development of further fluxing agents is crucial for enhancement of the key properties of bulk metallic glasses.
Authors:
; ; ;  [1]
  1. Laboratory of Metal Physics and Technology, Department of Materials, ETH Zurich, 8093 Zurich (Switzerland)
Publication Date:
OSTI Identifier:
22395640
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 1; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BORON; BORON OXIDES; COMPARATIVE EVALUATIONS; COPPER ALLOYS; GLASS; METALLIC GLASSES; OXYGEN; PALLADIUM ALLOYS; REDUCTION; SILICON ALLOYS; TRAPPING