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Pseudo-binary phase diagram for Zr-based in situ β phase composites

Published online by Cambridge University Press:  03 March 2011

S.Y. Lee ,
C.P. Kim ,
J.D. Almer ,
U. Lienert ,
E. Ustundag  and
W.L. Johnson
S.Y. Lee*
Affiliation:
Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011
C.P. Kim
Affiliation:
Department of Materials Science, California Institute of Technology, Pasadena, California 91125
J.D. Almer
Affiliation:
Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439
U. Lienert
Affiliation:
Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439
E. Ustundag
Affiliation:
Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011
W.L. Johnson
Affiliation:
Department of Materials Science, California Institute of Technology, Pasadena, California 91125
*
a) Address all correspondence to this author. e-mail: sylee@iastate.edu
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Abstract

The pseudo-binary (quasi-equilibrium) phase diagram for Zr-based bulk metallic glasses with crystalline in situ precipitates (β phase) has been constructed from high-temperature phase information and chemical composition analysis. The phase evolution was detected in situ by high-energy synchrotron x-ray diffraction followed by Rietveld analysis of the data for volume fraction estimation. The phase diagram delineates phase fields and allows the control of phase fractions. Combined with related previous work by the authors, this diagram offers a unique opportunity to control both the morphology and volume of the dendritic β phase precipitates to enhance the properties of the composites.

Keywords

CompositePhase equilibriaX-ray diffraction (XRD)
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 2 , September 2006 , pp. 538 - 543
Copyright
Copyright © Materials Research Society 2007

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References

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