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Journal of Phase Equilibria and Diffusion

, Volume 25, Issue 4, pp 355–363 | Cite as

Contribution to the Zr-rich part of the Zn-Zr phase diagram

  • Maureen E. Williams
  • William J. Boettinger
  • Ursula R. Kattner
Basic And Applied Research

Abstract

The reaction of zinc vapor with Zircaloy-4 and nuclear grade zirconium was investigated with various analytical techniques: optical metallography, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Based on the results, the Zr-rich part of the Zn-Zr phase diagram was revised. A eutectoid decomposition of (βZr) occurs at 718±6 °C with a composition of xZr=0.865; this temperature is lower than the previously accepted 750 °C eutectoid. The solubility of Zn in (αZr) was determined to be at x Zn=0.0236, a maximum at 725 °C. The intermetallic phase ZnZr2 was observed to occur in samples heat treated at 712 °C and 725 °C, but not in those heat treated at 700 °C and 775 °C.

Keywords

Nuclear Grade Spend Fuel Eutectoid Reaction Nuclear Regulatory Commission Compositional Line 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© ASM International 2004

Authors and Affiliations

  • Maureen E. Williams
    • 1
  • William J. Boettinger
    • 1
  • Ursula R. Kattner
    • 1
  1. 1.Metallurgy Division, National Institute of Standards and Technology 100 Bureau Dr.Gaithersburg

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