PHASE EQUILIBRIA IN THE Cu–Ti–Zr SYSTEM AT THE TEMPERATURE OF 750 °С.
I. THE ISOTHERMAL SECTION WITH COPPER CONTENT FROM 0 TO 50% (at.)

Abstract

Optical and scanning electron microscopy, electron microprobe analysis, and X-ray diffraction are employed to examine alloys in the Cu–Ti–Zr ternary system, annealed at 750 °С, with copper content from 0 to 50 at.%. A partial isothermal section of the phase diagram is constructed at 750 °С in the composition range in question. The existence of a continuous series of solid solutions between CuTi₂ and CuZr₂ isostructural compounds (γ-phase, MoSi₂ type) is confirmed. The homogeneity ranges of Cu₂TiZr ternary compound ((τ₁, MgZn₂ type) and β-(Ti, Zr), (CuTi) (CuTi type), and CuZr (CsCl type) solid solutions are determined.