Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 355, Issue 4-5, Pages 235-238Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnoncrysol.2008.12.001
Keywords
Amorphous metals, metallic glasses; Crystallization
Funding
- National Natural Science Foundation of China [50471075, 50471076]
- National Key Basic Research Program of China [2007CB613906]
- National Postdoctoral Science Foundation of China [20060400956]
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An evaluation of fcc-Al volume fractions (V-f) in Al90Ni5Nd5 and Al85Ni5Y6Co2Fe2 nanostructured composites has been made by differential scanning calorimetry (DSC) and X-ray diffraction (XRD) methods. For the Al90Ni5Nd5 alloy, there exhibited lower V-f values obtained by DSC than that by XRD due to increased interface energy and the overlapping of primary crystallization and structural relaxation features during nanocrystallization process. For the Al(85)Ni(5)y(6)Co(2)Fe(2) alloy, the V-f values calculated by both methods showed good agreements at low crystallinities, but apparent differences are observed at high crystallinities. This is due to compositional variations in the remaining amorphous matrix during devitrification. (C) 2008 Elsevier B.V. All rights reserved.
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