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Some observations of microstructural changes in alumina induced by Ti inhomogeneities

  • V. Jayaram (a1), B. J. Dalgleish (a1) and A. G. Evans (a1)

Abstract

Analysis of Ti-containing heterogeneities in a hot-pressed Al2O3 has revealed changes in microstructure caused by oxidation that provide some insight regarding the effects of Ti on local grain growth. The most consistent hypothesis is that Ti4+ in solution compensates the Mg2+ ion taken into solution from the MgO additive, probably by forming dipoles, and negates the effect of Mg2+ on grain boundary drag.

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Some observations of microstructural changes in alumina induced by Ti inhomogeneities

  • V. Jayaram (a1), B. J. Dalgleish (a1) and A. G. Evans (a1)

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