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Phase competition of Cu 64 Zr 36 and its effect on glass forming ability of the alloy
Author(s) -
Cui X.,
Zu F. Q.,
Zhang W. J.,
Wang Z. Z.,
Li X. Y.
Publication year - 2013
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201200337
Subject(s) - materials science , crystallization , amorphous metal , alloy , phase (matter) , electrical resistivity and conductivity , amorphous solid , diffraction , zirconium alloy , crystallography , metallurgy , analytical chemistry (journal) , chemical engineering , chemistry , optics , electrical engineering , organic chemistry , chromatography , engineering , physics
In the present paper, crystallization behavior and glass forming ability (GFA) of Cu 64 Zr 36 bulk metallic glass (BMG) were studied based on the crystal phase competition. Electrical resistivity and X‐ray diffraction results indicate that Cu 64 Zr 36 glass underwent a two‐stage crystallization process, during which Cu 10 Zr 7 and Cu 51 Zr 14 crystals precipitate at first and then there are only Cu 10 Zr 7 and Cu 8 Zr 3 phases at the end of the second stage. Intriguingly, it was found that it is the competing phase Cu 10 Zr 7 that weakens GFA of the Cu 64 Zr 36 alloy, because the Cu 10 Zr 7 precipitate is fully restrained in the cast rod when substituting Zr with 7.5at%Ti and thereby its diameter with fully amorphous structure is enlarged from 1 mm to 2 mm.