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Tem/Hrem Structural Characterization of Directionally Solidified Gaas-Cras Eutectic Crystals

Published online by Cambridge University Press:  21 February 2011

Sergei Ruvimov ,
Zuzanna Liliental-Weber ,
Wendy Swider ,
Jack Washburn  and
Douglas E. Holmes
Sergei Ruvimov
Affiliation:
Material Science Division, Lawrence Berkeley Laboratory, University of California, Mail Stop 62-203,1 Cyclotron Road, Berkeley, CA 94720
Zuzanna Liliental-Weber
Affiliation:
Material Science Division, Lawrence Berkeley Laboratory, University of California, Mail Stop 62-203,1 Cyclotron Road, Berkeley, CA 94720
Wendy Swider
Affiliation:
Material Science Division, Lawrence Berkeley Laboratory, University of California, Mail Stop 62-203,1 Cyclotron Road, Berkeley, CA 94720
Jack Washburn
Affiliation:
Material Science Division, Lawrence Berkeley Laboratory, University of California, Mail Stop 62-203,1 Cyclotron Road, Berkeley, CA 94720
Douglas E. Holmes
Affiliation:
Electronic Materials Engineering, 829 Flynn Road, Camarillo, CA 93012
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Abstract

Conventional and high resolution electron microscopy have been applied to characterize the microstructure of the CrAs-GaAs eutectic. The CrAs-GaAs eutectic crystals were directionally solidified by the Czochralski method in order to produce an ordered array of CrAs rods embedded in a GaAs matrix. The CrAs rods of 2-3 μm in diameter align parallel to the growth axis of the ingot. Where the GaAs matrix is found to contain structural defects, the CrAs rods are effectively defect-free. The CrAs has an orthorombic structure with the parameters a=3.5±0.1 Å, b=6.2±0.1 Å,c=5.7±0.1 Å.The c-axis is close to the direction of solidification.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 398: Symposium C – Thermodynamics and Kinetics of Phase Transformations , 1995 , 151
Copyright
Copyright © Materials Research Society 1998

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References

REFERENCES

1 Holmes, D.E., and Koo, L.Y., Materials Research Bulletin, 30, 453 (1995)Google Scholar
2 Porter, D.A., & Easterling, K.E., Phase Transformation in Metals and Alloys, Van Nostrand Reinhold (UK) Co Ltd. Publ., Wokingham, 1984, p.222 Google Scholar
3 Flemings, M.C., Solidification Processing, McGraw-Hill, New York, 1974 Google Scholar
4 Ohno, H., The Solidification of Metals, Chijin Shokan, 1976 Google Scholar
5 Solidification and Gating of Metals, 192, The Metals Society, London, 1979 Google Scholar
6 Bibring, H., Seibel, G., & Rabinovitch, M., Mem. Sei. Rev. Met., 49, 341 (1972)Google Scholar
7 Liebmann, W.K., & Miller, E.A., J. Appl. Phys., 34, 2653 (1963)Google Scholar
8 Riess., B. & Renner, T., Zeitschrift fur Naturforschung, 21, 546 (1966)Google Scholar
9 Muller, A., & Wilhelm, M., J. Phys. Chem. Solids, 26, 2021 (1965)Google Scholar
10 Deal, M.D., Gasser, R.A., and Stevenson, D.A., J. Phys. Chem. Solids, 46, 859 (1985)Google Scholar
11 Holmes, D.E., unpublishedGoogle Scholar
12 Witt, A.F, & Gatos, H.C., J. Electrochem. Soc., 115, 70 (1968)Google Scholar