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

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 rev...

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Bibliographic Details
Published inJournal of phase equilibria and diffusion Vol. 25; no. 4; pp. 355 - 363
Main Authors Williams, Maureen E, Boettinger, William J, Kattner, Ursula R
Format Journal Article
LanguageEnglish
Published Materials Park Springer Nature B.V 01.10.2004
Subjects
Electron microscopes
Electron microscopy
Eutectoid composition
Eutectoid decomposition
Eutectoid temperature
Heat treatment
Intermetallic phases
Mathematical analysis
Metallography
Microscopy
Phase diagrams
Scanning electron microscopy
Solubility
Zinc
Zircaloys (trademark)
Zirconium
Zirconium base alloys
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Summary: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 xZn=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.
Bibliography:ObjectType-Article-2
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ISSN:1547-7037
1863-7345
1934-7243
DOI:10.1007/s11669-004-0153-2