Title

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

Authors

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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