| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1565233 | Journal of Nuclear Materials | 2013 | 12 Pages |
Abstract
The effects of Fe addition in the range of 300-1250 ppm in cold worked stress-relieved Zr-2.5Nb pressure tube on oxidation and hydrogen pick up behavior have been studied after 415 °C steam autoclaving. Microstructure and micro-chemistry of second phase and precipitates were characterized using electron microscope. Addition of 800 ppm Fe in Zr-2.5Nb alloy led to better oxidation resistance. With further addition of Fe no significant improvement of oxidation resistance was observed but hydrogen-pickup was found to increase. Zr-Nb-Fe bearing precipitates were observed in Zr-2.5Nb alloy containing 800 ppm Fe. Further addition of Fe led to formation of Zr-Fe intermetallic. The chemical state of oxide has been determined by X-ray photo electron spectroscopy. Grazing Incidence X-ray Diffraction revealed that oxide in alloys with higher Fe, contained a higher fraction of tetragonal-Zirconia which is indicative of a protective oxide film and hence better oxidation resistance of the alloy.
Related Topics
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Authors
Gargi Choudhuri, Jagannath Jagannath, M. Kiran Kumar, V. Kain, D. Srivastava, S. Basu, B.K. Shah, N. Saibaba, G.K. Dey,