Short communication: “Effect of Nb on the electrical resistivity of ZrO2 layer formed on Zr alloys”

Short communication: “Effect of Nb on the electrical resistivity of ZrO2 layer formed on Zr alloys”

Although Nb-containing Zr alloys are widely used as the fuel cladding materials in nuclear power plants, the effect of Nb on charge transport in oxide layer is not clear. In this study, it was found that the electrical resistivity of ZrO2 layer formed on Nb-containing Zr alloy (Nb–ZrO2 layer) was ap...

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Bibliographic Details
Published in:Journal of nuclear materials Vol. 536; p. 152202
Main Authors: Kwon, Oh Hyun, Shin, Ji Ho, Jang, Changheui, Yoo, Jong-Sung, Kim, Ho-Sub, Kwon, Young-il, Kim, Hyun Gil
Format: Journal Article
Language:English
Published: Amsterdam Elsevier B.V 01-08-2020
Elsevier BV
Subjects:
Alloys
Charge transport
Corrosion
Electrical resistivity
Niobium
Nuclear fuels
Nuclear power plants
Oxidation
Zirconium base alloys
Zirconium dioxide
Zr alloy
Oxidation
Corrosion
Electrical resistivity
Niobium
Zr alloy
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Summary:Although Nb-containing Zr alloys are widely used as the fuel cladding materials in nuclear power plants, the effect of Nb on charge transport in oxide layer is not clear. In this study, it was found that the electrical resistivity of ZrO2 layer formed on Nb-containing Zr alloy (Nb–ZrO2 layer) was approximately 2–3 times higher than that of ZrO2 layer formed on Sn-containing Zr alloy (Sn–ZrO2 layer) between 400 and 600 °C. Mott-Schottky analysis showed lower oxygen vacancy concentration in the Nb–ZrO2 layer compared to Sn–ZrO2 layer.
ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2020.152202