Additive and Impurity Distributions at Grain Boundaries in Sintered Alumina

Document Type

Article

Publication Date

1-1-1975

Abstract

Additive and impurity distributions at grain boundaries in sintered Al2O3 were determined using a scanning Auger microprobe, transmission electron microscopy, metallography, and electron probe analysis. The results indicated that Ca was present uniformly at the boundaries as a segregant, whereas the Mg or Ni levels observed resulted from nonequilibrium spinel particles. The Ca concentrations were consistent with equilibrium segregation theory and followed an equilibrium segregation isotherm. Copyright © 1975, Wiley Blackwell. All rights reserved

Publication Title

Journal of the American Ceramic Society

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