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

 
V.Khoruzhaya,
 
V.Vereschaka,
  

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2013, #07/08
http://www.materials.kiev.ua/article/869

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.


INVARIANT EQUILIBRIUM, LIQUIDUS SURFACE, MELTING DIAGRAM, PRIMARY SOLIDIFICATION