Thermal expansion coefficients of a binary alloy Ni₈₀Zr₂₀ at elevated temperatures

The Debye-Scherrer pattern of the alloy Ni₈₀Zr₂₀ clearly shows the presence of a nickel solid-solution phase along with a new intermetallic phase Ni₂₃Zr₆, which seems to be isostructural with the Co₂₃Zr₆ phase. The thermal expansion coefficient of the Ni₂₃Zr₆ phase has been investigated in the temperature range 1003-1493 K. Linear variation of lattice parameter with temperature has been observed. The thermal expansion coefficient remains almost constant throughout this temperature interval.