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Indexed by:期刊论文

Date of Publication:2010-08-01

Journal:16th International Symposium on Metastable, Amorphous and Nanostructured Materials

Included Journals:SCIE、EI、CPCI-S、Scopus

Volume:504

Issue:SUPPL. 1

Page Number:S234-S238

ISSN No.:0925-8388

Key Words:Metallic glasses; Quasicrystals; Crystallization; Transmission electron microscopy

Abstract:The crystallization of (Zr65Al10Ni10Cu15)(98)Nb-2 metallic glasses has been studied using transmission electron microscopy (TEM), X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The ribbon glass and bulk metallic glass (BMG) of this alloy exhibit different crystallization behaviors. For ribbon glass in the first stage crystallization, icosahedral quasicrystal (I-phase) precipitated together with the eta-Zr2Ni (a = 1.226 nm) phase. The BMG alloy transforms into the I-phase and two coherently coexisted phases, namely, the Al2Zr3 phase and an unknown primitive cubic phase (a = 0.76 nm) in this stage. The experimental evidence indicates that the liquid cooling rate for sample preparation has a significant effect on its crystallization behavior of this alloy glass. (C) 2010 Elsevier B.V. All rights reserved.