ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
Most of the advanced Zr-based alloys contain Nb for improving the corrosion resistance.However, the Nb effect on the corrosion behavior of Zr alloys has not been established. Fordeveloping fuel cladding materials, it is essential to investigate the effect of the Nb-content andannealing conditions after beta quenching on the microstructure and the corrosion of Zr-xNb alloys.In this study, a systematic investigation to obtain the optimized annealing condition and Nb contentwere performed for Zr-xNb alloys (x = 0.1~2.0 wt.%). The corrosion resistance of 0.1 and 0.2 wt.%Nb alloys where Nb existed in an equilibrium soluble state in the matrix was excellent in thequenched and annealed conditions. For the high Nb-containing alloys, the corrosion rates were verysensitive to the annealing condition, and it took about 50 hours at 570[removed info] to reach the corrosion ratescomparable to those of the low Nb wt.% alloys. The corrosion resistance was closely related to thestabilization of the tetragonal ZrO2 and the columnar oxide structure when the Nb concentration inthe matrix was reduced to the equilibrium soluble limit
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/22/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.118.77.pdf
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