Experimental study of the phase equilibria of the Ni-Zr system

Na Wang, Changrong Li*, Zhenmin Du, Jingbo Li, Fenge Wang, Fuming Wang

*Corresponding author for this work

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Abstract

The eutectic reaction between the NiZr and NiZr2 compounds in the Ni-Zr binary phase diagram was evaluated according to the previous experimental measurements and thermodynamic calculations. A discrepancy between the calculations and the measurements exists. In order to determine definitely this eutectic temperature, Ni-Zr alloys of the compositions 65, 68, 72 and 74 wt.% Zr were prepared by melting in an arc furnace under a purified argon atmosphere. The phase transformation temperature was measured by Differential Scanning Calorimetry using both alumina and zirconia crucibles. At heating rates of 5, 10 and 20 K min-1, the eutectic temperature between the NiZr and NiZr2 compounds was determined consistently to be 1022 ± 5°C. Zirconia crucibles can be used in Differential Scanning Calorimetry measurements of zirconium-containing alloys but only below 1170°C.

Original languageEnglish
Pages (from-to)712-715
Number of pages4
JournalInternational Journal of Materials Research
Volume99
Issue number7
DOIs
Publication statusPublished - Jul 2008
Externally publishedYes

Keywords

  • Differential scanning calorimetry
  • Eutectic temperature
  • Ni-Zr binary

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Wang, N., Li, C., Du, Z., Li, J., Wang, F., & Wang, F. (2008). Experimental study of the phase equilibria of the Ni-Zr system. International Journal of Materials Research, 99(7), 712-715. https://doi.org/10.3139/146.101698