Study of microstructure and precipitates of a Zr-2.5Nb-0.5Cu CANDU spacer material

Qingshan Dong, Hongbing Yu, Zhongwen Yao, Fei Long, L. Balogh, Mark R. Daymond

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Synchrotron X-ray diffraction, scanning electron microscopy, and transmission electron microscope bright field and high angle annular dark field were employed to investigate the microstructure and precipitates of a Zr-2.5Nb-0.5Cu alloy wire, with potential application as a spacer in the CANDU® reactor design. Results show that three types of microstructure co-exist in the alloy: Widmanstätten structure, α-Zr grains without precipitates and α-Zr grains with precipitates. In the meantime, three types of second phase particles are detected: β-Nb, Zr2Cu and Zr2Fe, which have different distributions within the microstructure. The β-Nb precipitates are observed to be extensively distributed among the α plate boundaries and twin interfaces in the Widmanstätten structure, whereas the Zr2Cu and Zr2Fe precipitates are only found in the α plate boundaries. The orientation relations of the Zr2Cu precipitates with respect to the α-Zr and β-Nb are found to be (013)Zr2Cu//(0001)α (013)Zr2Cu//(0001)α, [03¯1]Zr2Cu//[1¯100]α and (013)Zr2Cu//(011)β−Nb, [03¯1]Zr2Cu//[2¯1¯1]β−Nb respectively.

Original languageEnglish
Pages (from-to)153-163
Number of pages11
JournalJournal of Nuclear Materials
Volume481
DOIs
Publication statusPublished - Dec 1 2016

Fingerprint

Precipitates
precipitates
microstructure
Microstructure
reactor design
Crystal microstructure
Synchrotrons
spacers
synchrotrons
Electron microscopes
electron microscopes
wire
Wire
X ray diffraction
Scanning electron microscopy
scanning electron microscopy
diffraction
x rays

Keywords

  • Microstructure
  • Orientation relationship
  • Precipitates
  • STEM
  • Zr-2.5Nb-0.5Cu

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

Cite this

Study of microstructure and precipitates of a Zr-2.5Nb-0.5Cu CANDU spacer material. / Dong, Qingshan; Yu, Hongbing; Yao, Zhongwen; Long, Fei; Balogh, L.; Daymond, Mark R.

In: Journal of Nuclear Materials, Vol. 481, 01.12.2016, p. 153-163.

Research output: Contribution to journalArticle

Dong, Qingshan ; Yu, Hongbing ; Yao, Zhongwen ; Long, Fei ; Balogh, L. ; Daymond, Mark R. / Study of microstructure and precipitates of a Zr-2.5Nb-0.5Cu CANDU spacer material. In: Journal of Nuclear Materials. 2016 ; Vol. 481. pp. 153-163.
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