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D. M. Kondratiev, K. B. Kalmykov, N. E. Dmitrieva, S. F. Dunaev
The
phase equilibria in the Al-Ni-Zr system at 1123 K
Abstract
The phase
equlibria in the Al–Ni–Zr system at 1123 K at aluminium concentration up to 45
at.% were investigated by the methods of X-ray and electron probe microanalysis.
The fragment of the isothermal crossection of this system is constructed. For
the first time there was established the existence of three-phase equilibria:
Zr7Ni10 + Zr8Ni21 + Zr2Ni7
, t2 + NiAl + Zr2Ni7,
NiAl + Ni3Al + Zr2Ni7, Zr7Ni10
+ Zr2Ni7 + t2 at 1123 K. The phase on the basis of the double Zr2Ni7
compound dissolves up to 13 at. % Al. The crystal structure of the
phase t7 on the Zr5Ni4Al
basis was defined: the structural type is the same as U3Si2,
the spatial group is P4/mbm (a = 7,1852 (7) Å, c = 3,3019
(5) Å).
Key words: phase equliribria, X-ray analysis, the electron probe
microanalysis, bulk amorphous materials.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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