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Processing Map for Zr-based In-situ β Phase Composites

Published online by Cambridge University Press:  01 February 2011

Seung-Yub Lee ,
John J.Z. Li ,
Jin-yoo Suh ,
Won-Kyu Rhim ,
William L. Johnson  and
Ersan Ustundag
Seung-Yub Lee
Affiliation:
sylee@iastate.edu, Iowa State University, Materials Science and Engineering, 2220 Hoover Hall, Ames, IA, 50011-2300, United States, 515-294-6676
John J.Z. Li
Affiliation:
jli@caltech.edu, California Institute of Technology, Materials Science, Pasadena, CA, 91125, United States
Jin-yoo Suh
Affiliation:
jinyoo@caltech.edu, California Institute of Technology, Materials Science, Pasadena, CA, 91125, United States
Won-Kyu Rhim
Affiliation:
wkrhim@caltech.edu, California Institute of Technology, Materials Science, Pasadena, CA, 91125, United States
William L. Johnson
Affiliation:
wlj@caltech.edu, California Institute of Technology, Materials Science, Pasadena, CA, 91125, United States
Ersan Ustundag
Affiliation:
ustundag@iastate.edu, Iowa State University, Materials Science and Engineering, Ames, IA, 50011, United States
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Abstract

The processing map for Zr-based bulk metallic glasses with crystalline in-situ precipitates (â phase) has been constructed from high temperature phase information, chemical composition analysis, and â phase crystallization kinetics. The phase evolution was detected in-situ by high energy synchrotron X-ray, and kinetic information on crystalline phase was measured from electrostatic levitation facility (ESL). This processing map offers a unique opportunity to control both volume and size of the dendritic â phase through composition and processing condition manipulation. The volume fraction of â phase can be customized from 6% to 93 %, and dendrite size is controllable between 1 and 50 µm at the current stage.

Keywords

phase equilibriax-ray diffraction (XRD)Zr
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1048: Symposium Z – Bulk Metallic Glasses–2007 , 2007 , 1048-Z07-05
Copyright
Copyright © Materials Research Society 2008

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