PHASE EQUILIBRIA IN THE TERNARY Al—Ti—Pt SYSTEM.
II. LIQUIDUS SURFACE OF THE Al—Ti—Pt SYSTEM IN THE COMPOSITIONS RANGE 0–50 at.% Pt

Abstract

Based on studies of the structure and phase composition and measurement of the liquidus temperatures for the as-cast alloys of the Al–Ti–Pt system in the composition range 0–50 at. % Pt produced using a series of techniques, the liquidus surface has been constructed for the first time on the composition triangle. It is established that the liquidus surface has 23 primary crystallization fields corresponding to the τ₁– τ₉, τ₁₁ ternary phases and binary phases that form in the boundary system and to the solid solutions based on components. The extension of these fields and the positions of univariant curves and invariant points have been determined. The liquidus surface exists in the temperature range from 1830 °С (corresponding to congruent melting of TiPt compound) to 655 °С (temperature of the l ⇄ <Al>+<Al₂₁Pt₅>  eutectic in the binary Al–Pt system).