Structural Phase Transformations in Zr₅₀Co₂₅Ni₂₅ alloy

Abstract

High-temperature X-ray diffraction is applied to study for the first time the structural phase transformations in the Zr₅₀Co₂₅Ni₂₅ alloy at 30–800 °C. It is shown that this alloy contains one phase at room temperature, with orthorhombic crystal structure of CrB type. When temperature increases to 400 °С, this phase transforms into tetragonal phase of AuCu type. A phase with cubic crystal structure of CsCl type and a monoclinic one of TiNi type show up at 800 °C. The TiNi-type phase remains up to room temperature when the sample is cooled down.