Conferences

A STUDY OF THE Al–Ni–Pt ALLOY SYSTEM.
PHASE EQUILIBRIA AT 1100 AND 1300 °C

B.Grushko,
 
D.Kapush,
  
V.Zh.Shemet
 

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Omeliana Pritsaka str.,3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2011, #07/08
http://www.materials.kiev.ua/article/1439

Abstract

The Al–Ni–Pt phase diagram studied in the whole compositional region at 1300 and 1100 °C. The Al2Pt phase found to extend up to at least Al53Ni23Pt24 composition, separating the Al3Pt2 and Al3Ni2 phase fields. The Al–Ni β phase dissolves up to 38 at.% Pt at 1100 °C, while at 1300 °C the β region probably extends between the isostructural CsCl-type phases forming at the Al–Pt and Al–Ni terminals. The AlNi3 phase (γ’) extends up to 35 at.% Pt at practically constant Al concentration, while the high-temperature AlPt3 extends up to 15 at.% Ni. A ternary phase is formed in a wide compositional region between the regions of γ, γ’, β, and AlNi3. Apart from the AuCu-type structure of this ternary phase earlier reported, also its C-centered orthorhombic superstructure with a four-times larger unit cell revealed in the high-Al part of the compositional region.


PHASE DIAGRAMS, TRANSITION METAL ALLOYS AND COMPOUNDS