Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/36133
Title: Thermostability and thermoplastic formability of (Zr65Cu17.5Ni10Al7.5)(100-x)REx (x=0.25-3.25, RE: Y, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) bulk metallic glasses
Authors: Hu, Q
Fu, MW 
Zeng, XR
Keywords: Bulk metallic glasses
Super-cooled liquid
Thermoplastic formability
Thermostability
Rare-earth
Issue Date: 2014
Publisher: Elsevier
Source: Materials and design, 2014, v. 64, p. 301-306 How to cite?
Journal: Materials and design 
Abstract: The width Delta L of super-cooled liquid region (SCLR) and the softness (Delta L/L-0)(s) of (Zr65Cu17.5Ni10Al7.5)(100-x)REx (x = 0.25-3.25, rare-earth RE: Y, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) bulk metallic glasses (BMGs) in SCLR are systemically investigated by thermoanalysis tests, where Delta T and (Delta L/L-0)(s) are used to evaluate their thermostability and thermoplastic formability in SCLR, respectively. It is found that only a small amount of Yb can be added into the matrix alloy, and the addition of each RE increases Delta T. With the addition of the same RE, (Lambda L/L-0)(s) depends on Lambda T, but with the addition of different RE elements, (Lambda L/L-0)(s) and Delta L have not a clear correlation and the best addition amount is different. These phenomena and regularities are well explained based on the properties of RE elements, including boiling point, mixing enthalpy, oxides formation enthalpy and shear modulus. The improvement in the formability of (Zr(65)Cu(17.5)Ni(10-)Al(7.)5)(98.00)Er-2.00, which has the largest (Delta L/L-0)(s), is also verified by thermoplastic forming experiment. This composition has the best formability in the Be-free Zr-based BMGs. The researches provide a basis for development of new BMGs with better thermostability and thermoplastic formability via minor addition of RE elements.
URI: http://hdl.handle.net/10397/36133
ISSN: 0264-1275 (print)
1873-4197 (online)
0261-3069
DOI: 10.1016/j.matdes.2014.07.057
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