Effects of Cr on the interdiffusion between Ce and Fe–Cr alloys

Lo, Wei-Yang; Silva, Nicolas; Wu, Yuehong; Winmann-Smith, Robert; Yang, Yong

doi:10.1016/j.jnucmat.2014.12.035

Cited by 6 publications

(2 citation statements)

References 19 publications

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“…The bounding surface was rubbed on a clean napped polishing pad to fully remove oxides, which is similar with the process in Ref. [17]. Note that the polishing process that running with water and diamond paste were not applied in this work, as water would rapidly oxidize cerium.…”

Section: Materials and Experimentsmentioning

confidence: 99%

Thermodynamic stability studies of Ce-Sb compounds with Fe

Xie

Zhang

Benson

et al. 2018

Journal of Nuclear Materials

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Lanthanide fission products can migrate to the fuel periphery and react with cladding, causing fuelcladding chemical interaction (FCCI). Adding a fuel additive dopant, such as Sb, can bind lanthanide, such as Ce, into metallic compounds and thus prevent migration. The present study focuses on the thermodynamic stability of Ce-Sb compounds when in contact with the major cladding constituent Fe by conducting diffusion couple tests. Ce-Sb compounds have shown high thermodynamic stability as they did not react with Fe. When Fe-Sb compounds contacted with Ce, Sb was separated out of Fe-Sb compounds and formed the more stable Ce-Sb compounds.

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Section: Materials and Experimentsmentioning

confidence: 99%

Thermodynamic stability studies of Ce-Sb compounds with Fe

Xie

Zhang

Benson

et al. 2018

Journal of Nuclear Materials

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“…The smaller diffusion depth in the Ce side in the present study is due to the Cr in HT9. A previous study on the interdiffusion between Ce and the 12Cr-Fe wt% alloy suggested that when Ce diffuses into the alloy, interacting with Fe, the Cr present would segregate and precipitate into a Cr-rich σ phase composed of Cr and Fe [31]. Because the σ-(Cr, Fe) phase consumes some of the available Fe at the interface, less Fe is available to diffuse into Ce, therefore slowing down the diffusion of Fe into Ce.…”

Section: Ht9/ce and Fe/cementioning

confidence: 99%

Diffusion behavior of lanthanide-additive compounds (Ce4Sb3, Ce2Sb, and CeTe) against HT9 and Fe

Xie

Zhang

Benson

et al. 2019

Materials Characterization

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A B S T R A C TAntimony and tellurium have been identified as promising additives in metallic fuel, which can immobilize freelanthanide fission products into stable intermetallic compounds in order to mitigate the fuel-cladding chemical interaction. Ce 4 Sb 3 , Ce 2 Sb, and CeTe are the primary compounds formed by Sb or Te with the lanthanide Ce present in the fuel. If these compounds are present at the outer periphery of the fuel, they will come in contact with and react with the cladding after the fuel swells. The present study investigates the reactivity of these compounds with two cladding materials, HT9 and Fe. The diffusion couple tests between these compounds and HT9 or Fe were conducted at 853 K. Scanning electron microscopy and transmission electron microscopy were used to analyze the morphology, microstructure, and phase distribution of the diffusion region. It was observed that the diffusion region thickness formed by the three compounds was significantly reduced compared to free Ce. There was no observed diffusion or reaction between Ce 4 Sb 3 or Ce 2 Sb with either HT9 or Fe. CeTe was found to diffuse and react with HT9, forming Cr 3 Te 4 and TeFe at the diffusion region, as well as to penetrate into Fe, mostly by intergranular diffusion.

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