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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


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.
Moscow University Chemistry Bulletin.
2012, Vol. 53, No. 6, P. 374

Copyright (C) Chemistry Dept., Moscow State University, 2002
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