| Title |
Effects of Annealing Parameter on Corrosion Mechanism in Zr-Sn-Nb Alloys |
| Authors |
백종혁(Jong Hyuk Baek),정용환(Yong Hwan Jeong),김인섭(In Sup Kim) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Abstract |
To investigate the effects of Nb content and annealing parameter on corrosion resistance in Zr 0.8Sn-xNb(x = 0.2, 0.4, 0.8%) alloys, corrosion tests have been carried out under 400℃ steam and 360℃ LiOH water conditions. As the annealing parameter increased, the corrosion resistance was rapidly increased in Zr-0.8Sn-0.2Nb alloys but decreased in Zr-0.8Sn-0.4Nb and Zr-0.8Sn-0.8Nb alloys in both corrosion conditions. The degradation of corrosion resistance in Zr-0.8Sn-0.4Nb was resulted from the decrease of Nb concentration in matrix and the increase of Nb concentration in precipitates due to the formation of Nb-containing precipitates when the annealing parameter increased. The increase of tetragonal ZrO₂ in the oxide of Zr-0.8Sn-0.4Nb gave rise to increase the corrosion resistance with decreasing the annealing parameter. And it was thought that the corrosion resistance of Zr-0.8Sn-0.8Nb increased with the decrease of super-saturated Nb content in matrix caused by the formation of β-Nb. |