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Structural relaxation, glass-forming ability and mechanical properties of Mg–Cu–Ni–Gd alloys

Authors
Journal
Journal of Non-Crystalline Solids
0022-3093
Publisher
Elsevier
Publication Date
Volume
351
Identifiers
DOI: 10.1016/j.jnoncrysol.2005.01.061

Abstract

Abstract The structural relaxation and glass-forming ability (GFA) of Mg–Cu–Gd-based glassy alloys and the effect of Ni addition on the glass-forming ability, structural relaxation and mechanical properties were studied by thermal analysis, X-ray diffractometry (XRD) and transmission electron microscopy (TEM). The medium-range order (MRO) zones of about 1–2 nm size were observed in the Mg 65Cu 25Gd 10 glassy alloy after structural relaxation caused by annealing for 180 s at 305 K. The structural relaxation resistance increased with decreasing Cu content, although the GFA also decreased in Mg–Cu–Gd-based alloys. Appropriate substitution of Cu by Ni in Mg 75Cu 15Gd 10-based alloy not only improved the glass-forming ability and mechanical properties, but also increased the stability against structural relaxation.

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