Thus, if an
entropically stabilised single solid solution phase was to exist, it
could only do so between 1100 C and the onset of melting at
1150 C. No evidence of a transformation was observed in the DSC
thermograms between these temperatures and as the extent of
entropic stabilisation will decrease at lower temperatures, it can be
concluded that there is no a single solid solution phase field in this
material. Furthermore, the elemental partitioning associated with
the formation of the two phases will significantly reduce their
entropic stability, increasing their susceptibility to further phase
decomposition.