Constitution of Alloys and Phase Diagram of the Al-Cr-Pt Ternary System at 50-100 At.% Pt.
II.Melting Diagram of the Al-Cr-Pt System at 50-100% (ат.) Pt

Abstract

The previously obtained data on the constitution of the solidus surface in the Al-Cr-Pt system at 0-100 at.% Pt and results from study of its as-cast alloys are used for metallurgical, X-ray diffraction, electron microprobe, and differential thermal analyses to construct the liquidus surface on the composition triangle and analyze alloy solidification processes. This I has permitted the construction of the Al-Cr-Pt melting diagram in the composition range 50-100 at.% Pt for the first time. It is determined that the liquidus surface consists of six areas of primary solidification of the platinum-based solid solution and phases based on binary and one ternary compounds. Four invariant four-phase equilibria involving the liquid phase (two eutectic and two transition equilibria) and three invariant three-phase eutectic equilibria are observed in the system.