Crystallography and Microstructure of Directionally Solidified Oxide Eutectics

Abstract

The crystallographic features of several directionally solidified binary oxide eutectics were examined by the Buerger precession X‐ray method and are discussed in terms of the lattice misfit and ionic charge compensation at the interface, particularly with regard to the oxygen sublattice. Fibrous and lamellar micro‐structures are classified and the resultant morphologies related to the phase volumes. The interphase spacing proportionality to the inverse square root of the solidification rate is examined.