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Phase Identification in Rapidly Solidified Al-In Alloys Using High Resolution Synchrotron Radiation Diffraction and Transmission Electron Microscopy

Published online by Cambridge University Press:  15 February 2011

J. Tao ,
D. C. Van Aken  and
J. C. Bilello
J. Tao
Affiliation:
Department of Materials Science and Engineering, The University of Michigan, 2300 Hayward St., Ann Arbor, MI 48109-2136, U.S.A.
D. C. Van Aken
Affiliation:
Department of Materials Science and Engineering, The University of Michigan, 2300 Hayward St., Ann Arbor, MI 48109-2136, U.S.A.
J. C. Bilello
Affiliation:
Department of Materials Science and Engineering, The University of Michigan, 2300 Hayward St., Ann Arbor, MI 48109-2136, U.S.A.
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Abstract

A metastable (face centered) cubic form of indium has been identified in melt-spun Al-4.3at% indium using high resolution synchrotron radiation diffraction. The microstructure of the melt-spun ribbons consisted of particles of nominally pure indium dispersed in an aluminum matrix. These particles ranged in size from 10 nm to 1000 nm through the thickness of the ribbons. Only the smallest indium particles were identified as being cubic and these were observed in electron transparent regions of the as-spun ribbons. The cubic indium phase had the following orientation relationship with the matrix: [001]In′ // [001]Al and (100)In′ // (001)Al. The size distribution and average diameter of the cubic particles were obtained by quantitative analysis of the diffraction line profiles. These measurements were corroborated with transmission electron microscopy observations. The volume percent of the cubic indium phase was determined by matching simulations of the x-ray diffraction patterns with the diffracted intensities found experimentally. Approximately 10–20% of the indium is present in the cubic form and the remainder is the stable tetragonal phase.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 307: Symposium L – Applications of Synchrotron Radiation Techniques to Materials Science , 1993 , 299
Copyright
Copyright © Materials Research Society 1993

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References

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