Compatibility of SiC with ODS FeCrAl in flowing Pb-Li at 600° - 700°C

Pint, Bruce; Jun, Jiheon; Romedenne, Marie

doi:10.1016/j.fusengdes.2021.112389

Compatibility of SiC with ODS FeCrAl in flowing Pb-Li at 600° - 700°C

Journal Article · Fri Feb 19 00:00:00 EST 2021 · Fusion Engineering and Design

DOI:https://doi.org/10.1016/j.fusengdes.2021.112389· OSTI ID:1783033

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Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Div., Corrosion Science and Technology Group

To establish the maximum operating temperature for the dual coolant lead lithium (DCLL) blanket concept, thermal convection loop (TCL) experiments were conducted for 1000 h with a peak temperature of 700 °C to determine compatibility with commercial eutectic Pb~17at.%Li. Two TCLs were fabricated from alloy APMT (FeCrAlMo) and the baseline TCL experiment contained only APMT specimens. The second TCL experiment exposed more fusion relevant CVD SiC and ODS Fe-10Cr-6Al specimens in the hot and cold legs. In the second experiment, the mass losses were much larger for the ODS FeCrAl specimens and most of the CVD SiC specimens experienced a mass gain as SiC reacted to form an Fe- and Cr-rich carbide reaction product. Dissolved Fe and Cr reacted with the SiC and removing Fe and Cr from the liquid appeared to increase ODS FeCrAl dissolution. Such a dissimilar material interaction appears consistent with thermodynamic calculations. Significant attack at the top of the hot leg in both experiments suggests that the Pb-Li compatibility of FeCrAl alloys is inadequate at 700 °C in a flowing environment and the maximum PbLi temperature is < 675 °C.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1783033

Alternate ID(s):: OSTI ID: 1815252
OSTI ID: 23200578

Journal Information:: Fusion Engineering and Design, Journal Name: Fusion Engineering and Design Journal Issue: 5 Vol. 166; ISSN 0920-3796

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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