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Anion Grain Boundary Diffusion in Cr2O3 and Cr2 O3-0.09 Weight Percent Y2O3

Published online by Cambridge University Press:  26 February 2011

Wayne E. King  and
J. H. Park
Wayne E. King
Affiliation:
Chemistry and Materials Science Department, Lawrence Livermore National Laboratory, Livermore, CA 94550
J. H. Park
Affiliation:
Materials and, Conponents Technology Division, Argonne National Laboratory, Argonne, IL 60439
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Abstract

Anion diffusivities in the lattice and along grain boundaries have been measured on sintered polycrystals of Cr2 O3 and Cr2O3-0.09 weight percent Y2 O3at 1100°C and at the oxygen partial pressure corresponding to that of the Cr/Cr2O3 equilibrium at thattemperature. Results show that under the same conditions, anion diffusion is significantly faster than cation diffusion. The results are discussed in terms of their implications for the reactive element effect on high temperature oxidation of chromia forming alloys.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 122: Symposium I – Interfacial Structure, Properties, and Design , 1988 , 193
Copyright
Copyright © Materials Research Society 1988

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References

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