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Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/4891

Title: Characteristic free volumes of bulk metallic glasses: measurement and their correlation with glass-forming ability
Authors: Hu, Qiang
Zeng, Xie-rong
Fu, M. W.
Subjects: Boron alloys
Chromium alloys
Copper alloys
Erbium alloys
Glass transition
Iron alloys
Metallic glasses
Molybdenum alloys
Nickel alloys
Palladium alloys
Phosphorus alloys
Vitrification
Issue Date: 1-Mar-2011
Publisher: American Institute of Physics
Citation: Journal of applied physics, 1 Mar. 2011, v. 109, no. 5, 053520, p. 1-5.
Abstract: A convenient method is proposed for the measurement of the characteristic free volumes, viz., the amount of excess free volume annihilation in structural relaxation V[sub f-sr] and the amount of new free volume production in glass transition V[sub f-gt] of bulk metallic glasses (BMGs) by thermal dilation (DIL) test. Through the DIL tests, the characteristic free volumes are found to be sensitive to the change of glass forming ability (GFA). The Pd₄₀Cu ₃₀Ni₁₀P₂₀BMG has a quite small V[sub f-sr]. For a series of Fe–Cr–Mo–C–B–(Er) BMGs, Fe₄₈Cr₁₅Mo₁₄C₁₅B₆Er₂with the largest GFA is identified to have the largest V[sub f-gt] and smallest V[sub f-sr]. The correlation between V[sub f-sr] and the squares of critical diameters of these iron-based BMGs can be fitted as a negative exponential function with high accuracy.
Description: DOI: 10.1063/1.3549819
Rights: © 2011 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Q. Hu, X. R. Zeng & M. W. Fu, J. Appl. Phys. 109, 053520 (2011) and may be found at http://link.aip.org/link/?jap/109/053520.
Type: Journal/Magazine Article
URI: http://hdl.handle.net/10397/4891
ISSN: 0021-8979 (print)
1089-7550 (online)
Appears in Collections:ME Journal/Magazine Articles

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