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Rapid Solidification of An Al2O3-25WT.PCT.ZrO2 Oxide Alloy

Published online by Cambridge University Press:  25 February 2011

Teiichi Ando ,
Yuh Shiohara  and
M.C. Flemings
Teiichi Ando
Affiliation:
Toyo Kohan Co. Ltd., Visiting scientist, Materials Processing Center
Yuh Shiohara
Affiliation:
Materials Processing Center, Massachusetts Institute of Technology
M.C. Flemings
Affiliation:
Dept. of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139
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Abstract

TEM observation of the morphology of alumina dendrites in a rapidly solidified Al203-25w/oZrO22 oxide alloy revealed three distinct dendrite morphologies corresponding to α-, γ- and δ- aluminas. STEM analysis showed the center of the α and γ dendrites to be solute poor, but the δ dendrite center to be solute rich, indicating possible solute trapping. Theoretical calculations show interface growth velocities in excess of 3m/sec.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 58 , 1985 , 455
Copyright
Copyright © Materials Research Society 1986

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References

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