Abstract
The phase equilibria in the Al-Ni-Cu-Zr quaternary system at 1123 K and a concentration of Zr higher than 30 at % have been determined using the methods of X-ray phase analysis, X-ray spectral microanalysis, scanning electron microscopy, and differential scanning calorimetry. An area of the existence of a quaternary liquid phase with a melting point of 1110 K at the concentrations of copper and zirconium equal to 15.1 and 58.0 at %, respectively, was detected in the system. The concentrations of other components vary in the range from 13.4 to 19.5 for Al and from 7.4 to 13.5 at % for Ni. For the first time, the existence of seven four-phase equilibria was determined experimentally.
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Original Russian Text © K.B. Kalmykov, N.E. Dmitrieva, S.F. Dunaev, D.M. Kondratiev, 2014, published in Vestnik Moskovskogo Universiteta. Khimiya, 2014, No. 6, pp. 351–359.
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Kalmykov, K.B., Dmitrieva, N.E., Dunaev, S.F. et al. Phase equilibria in the Al-Ni-Cu-Zr quaternary system at 1123 K and a zirconium concentration higher than 30 atomic percent. Moscow Univ. Chem. Bull. 69, 266–273 (2014). https://doi.org/10.3103/S0027131414060029
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DOI: https://doi.org/10.3103/S0027131414060029