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Kim, Ji Hyun
UNIST Nuclear Innovative Materials Laboratory(UNIMAT)
Research Interests
  • High temperature water corrosion
  • Liquid metal corrosion
  • Material degradation simulation

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Correlation between carbon activity and carbon content in α-iron in liquid sodium negative electrode of liquid metal battery

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Title
Correlation between carbon activity and carbon content in α-iron in liquid sodium negative electrode of liquid metal battery
Author
Shin, Sang HunLee, Jeong HyeonLee, Jung KiKim, Ji Hyun
Issue Date
2015-11
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF POWER SOURCES, v.297, pp.105 - 112
Abstract
Non-metallic elements such as carbon, oxygen, and nitrogen in liquid sodium exert a significant effect on the material behaviour of cell construction materials in liquid metal battery systems. Austenitic Fe-18% Cr-8%Ni foil and alpha-iron foil are equilibrated at 550 degrees C in sodium, and, subsequently, the concentration of carbon in the foils is analysed. A new relationship has been obtained between carbon activity and carbon concentration in alpha-iron foil, and is compared with the previously developed ones involving 304 SS foil reference samples. An equilibrium method has been developed to measure the activity of carbon in liquid sodium by using alpha-iron with this new expression. The results show similar values to those obtained with the 304 SS foil reference samples. (C) 2015 Elsevier B.V. All rights reserved.
URI
https://scholarworks.unist.ac.kr/handle/201301/16658
URL
http://www.sciencedirect.com/science/article/pii/S0378775315301403
DOI
10.1016/j.jpowsour.2015.07.090
ISSN
0378-7753
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