A TEM study on the crystallization behavior of an yttrium-doped Zr-based bulk metallic glass

Yan, M, Zou, Jin and Shen, J (2007) A TEM study on the crystallization behavior of an yttrium-doped Zr-based bulk metallic glass. Intermetallics, 15 7: 961-967.


Author Yan, M
Zou, Jin
Shen, J
Title A TEM study on the crystallization behavior of an yttrium-doped Zr-based bulk metallic glass
Journal name Intermetallics   Check publisher's open access policy
ISSN 0966-9795
Publication date 2007
Year available 2007
Sub-type Article (original research)
DOI 10.1016/j.intermet.2006.11.006
Volume 15
Issue 7
Start page 961
End page 967
Total pages 7
Editor Liu, C.T.
Morris, D.
Sauthoff, G.
Place of publication Oxford
Publisher Elsevier Sci Ltd
Collection year 2008
Language eng
Subject 291804 Nanotechnology
780102 Physical sciences
C1
Abstract Transmission electron microscopy (TEM) is used to conduct the systematic study of the annealing induced crystallization, both continuously and isothermally, of a Zr-based metallic glass. Through detailed microstructure analysis, it is found that the crystallization of this metallic glass is initialized by a nano-scaled primary crystallization process with a tetragonal structured crystal (a = 0.96 nm and c = 2.82 nm) as the primary phase. A eutectic crystallization is followed afterwards with two types of crystalline phases as the crystallization products, one of which is determined to be a metastable orthorhombic phase (a = 0.69 nm, b = 0.75 nm and c = 0.74 nm). Upon annealing at a raised temperature or isothermal treatments, a solid state phase transformation takes place and the orthorhombic metastable phase transforms into two types of tetragonal crystalline phases. The whole crystallization process of this metallic glass is in turn realized, and the thermal stability and nano-crystallization mechanism are discussed based on the microstructure and thermal analyses. (C) 2007 Elsevier Ltd. All rights reserved.
Keyword Chemistry, Physical
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
glasses, metallic
electron microscopy, transmission
thermal stability
microstructure
Mechanical-properties
Crystal Nucleation
Amorphous-alloys
Phase-formation
Growth
Oxygen
Q-Index Code C1
Q-Index Status Confirmed Code

 
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Created: Mon, 18 Feb 2008, 17:33:06 EST