TY - JOUR
T1 - Improvement in the hydrothermal corrosion resistance of Ti-based nitride coatings by adding Cr for accident tolerant fuel cladding applications
AU - Do, Arang
AU - Kim, Daejong
AU - Choi, Heon Jin
AU - Kim, Sung Woo
AU - Lim, Sang Yeob
AU - Lee, Hyeon Geun
AU - Kim, Weon Ju
N1 - Publisher Copyright:
© 2021
PY - 2021/6
Y1 - 2021/6
N2 - In order to improve the hydrothermal corrosion resistance of nuclear fuel cladding, TiN and TiCrN were deposited on the surface of a Zr-based alloy tube as an environmental barrier coating using arc ion plating and DC sputtering under an Ar+N2 atmosphere. A hydrothermal corrosion test was carried out at 360 °C and 20 MPa for 120 days in simulated PWR primary water chemistry. To similar the water chemistry, 1200 ppm H3BO3, 2.2 ppm LiOH, and 25 cc·H2/kg·H2O were added to pressurized water. The pH and conductivity were controlled to be 23 μS/cm and 6.5, respectively. After the hydrothermal corrosion test, a microscale of FeTiO3 covered the entire surface of TiN due to its rapid corrosion rate. On the other hand, the thickness of the oxide layer on TiCrN was reduced to a range of tens of nanometers. The corrosion product on the surface was identified as FeCr2O4. This spinel-structured FeCr2O4 effectively suppressed the corrosion of the TiCrN and improved the corrosion resistance.
AB - In order to improve the hydrothermal corrosion resistance of nuclear fuel cladding, TiN and TiCrN were deposited on the surface of a Zr-based alloy tube as an environmental barrier coating using arc ion plating and DC sputtering under an Ar+N2 atmosphere. A hydrothermal corrosion test was carried out at 360 °C and 20 MPa for 120 days in simulated PWR primary water chemistry. To similar the water chemistry, 1200 ppm H3BO3, 2.2 ppm LiOH, and 25 cc·H2/kg·H2O were added to pressurized water. The pH and conductivity were controlled to be 23 μS/cm and 6.5, respectively. After the hydrothermal corrosion test, a microscale of FeTiO3 covered the entire surface of TiN due to its rapid corrosion rate. On the other hand, the thickness of the oxide layer on TiCrN was reduced to a range of tens of nanometers. The corrosion product on the surface was identified as FeCr2O4. This spinel-structured FeCr2O4 effectively suppressed the corrosion of the TiCrN and improved the corrosion resistance.
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U2 - 10.1016/j.jnucmat.2021.152903
DO - 10.1016/j.jnucmat.2021.152903
M3 - Article
AN - SCOPUS:85102108675
SN - 0022-3115
VL - 549
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
M1 - 152903
ER -