Abstract
An in situ high-temperature high-pressure angle-dispersive synchrotron radiation diffraction study has revealed the $\ensuremath{\omega}$-to-${\ensuremath{\omega}}^{\ensuremath{'}}$ isostructural transformation in the equiatomic $\mathrm{TiZr}$ alloy. Volume collapse across the phase transformation is about 14%. On further compression the collapsed ${\ensuremath{\omega}}^{\ensuremath{'}}$ structure transforms to a noncollapsed cubic $\ensuremath{\beta}$ structure with the partial atomic volume increase about 13%. Observed effects are discussed in terms of the $s\text{\ensuremath{-}}d$ electron transfer and nonadiabatic electron-phonon interactions.
Published Version
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