High-pressure stability of Ti-Zr-Ni quasicrystals

Abstract

The room-temperature compressibility and stability of single-phase icosahedral Ti-Zr-Ni alloys were investigated for pressures up to 30 GPa, using synchrotron radiation energy dispersive diffraction. The icosahedral Ti-Zr-Ni single phase is stable over this pressure range, no phase transition being noticed. The pressure-volume data were least-squares fitted to a Birch-Murnaghan equation of state to obtain the zero-pressure bulk modulus ${B}_{0}=(173\ifmmode\pm\else\textpm\fi{}5)\mathrm{GPa}$ and its pressure derivative ${B}_{0}^{\ensuremath{'}}=2.3\ifmmode\pm\else\textpm\fi{}0.5.$