The microstructures of ternary alloy compositions based on the highly magnetostrictive (Tb,Dy)Fe/sub 2/ compounds have been investigated by SEM (scanning electron microscope) metallography. The influence of preparation route and heat treatment on the prevailing microstructure has been examined. As-cast and annealed induction melted material have both been examined as a function of iron composition. Lattice parameter variations with composition and heat treatment have been observed. The detailed microstructures have been characterized by BSE imaging, X-ray microanalysis, and electron microprobe analysis. Interpretation of the results has led to the suggestion of a modified phase diagram in the region of the Laves phase compound.>
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Westood et al. (1988) studied this question.
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