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Comments on “Fabrication of ternary Mg–Cu–Gd bulk metallic glass with high glass-forming ability under air atmosphere” [H. Men and D.H. Kim, J. Mater. Res. 18, 1502 (2003)]

Published online by Cambridge University Press:  03 March 2011

Z.P. Lu  and
C.T. Liu
Z.P. Lu
Affiliation:
Metals and Ceramic Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
C.T. Liu
Affiliation:
Metals and Ceramic Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
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Abstract

A new Mg-based bulk amorphous alloy (i.e., Mg65Cu25Gd10) has successfully been developed by Men and Kim [H. Men and D.H. Kim, J. Mater. Res. 18, 1502 (2003)]. They showed that this alloy exhibits significantly improved glass-forming ability (GFA) in comparison with Mg65Cu25Y10 alloy. However, this improved GFA cannot be indicated by the supercooled liquid region ΔT and the reduced glass-transition temperature Trg. As shown in the current comment, the new parameter γ, Tx/(Tg + Tl) defined in our recent papers [Z.P. Lu and C.T. Liu, Acta Mater. 50, 3501 (2002); Z.P. Lu and C.T. Liu, Phys. Rev. Lett. 91, 115505 (2003)] can well gauge GFA for bulk metallic glasses, including the current Mg-based alloys.

Keywords

Metallic glassesStabilityCasting
Type
Commentary
Information
Journal of Materials Research , Volume 19 , Issue 2 , February 2004 , pp. 427 - 428
Copyright
Copyright © Materials Research Society 2004

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References

REFERENCES

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