Unusual solidification behavior of a Zr-Cu-Ni-Al bulk glassy alloy made from low-purity Zr

    Authors

    D. V. Louzguine-Luzgin; C. Suryanarayana; T. Saito; Q. S. Zhang; N. Chen; J. Saida;A. Inoue

    Comments

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    Abbreviated Journal Title

    Intermetallics

    Keywords

    Glasses; metallic; Phase transformation; Casting; Electron microscopy; transmission; SUPERCOOLED LIQUID REGION; METALLIC-GLASS; AMORPHOUS-ALLOYS; FORMING; ABILITY; CRYSTALLIZATION BEHAVIOR; PHASE-FORMATION; TRANSITION; TEMPERATURE; FATIGUE BEHAVIOR; 30 MM; OXYGEN; Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy &; Metallurgical Engineering

    Abstract

    This paper reports on the unusual solidification behavior of Zr(55)Cu(30)Al(10)Ni(5) bulk glassy alloy produced using low-purity Zr in which both primary and eutectic-type structural constituents were formed simultaneously during solidification of the melt. Additionally, two different types of primary crystalline phases were observed. One of them was cF96 and contained all the four constituent elements. Reasons for these observations have been related to the presence of impurities in the alloy leading to inhomogeneous nucleation and consequent modification of the crystallization behavior. The structure and thermal stability of the samples were studied using X-ray diffraction, scanning and transmission electron microscopy, as well as differential scanning calorimetry methods. Although the cast alloys made with low-purity Zr showed somewhat decreased glass-forming ability, their mechanical strength was still high. (C) 2010 Elsevier Ltd. All rights reserved.

    Journal Title

    Intermetallics

    Volume

    18

    Issue/Number

    8

    Publication Date

    1-1-2010

    Document Type

    Article

    Language

    English

    First Page

    1531

    Last Page

    1536

    WOS Identifier

    WOS:000279953000015

    ISSN

    0966-9795

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