| Influence of Metal Buffer Layer on Water Vapour Oxidation
of Cr2AlC Coatings on Zry-4 Substrates for Accident
Tolerant Fuel Applications |
Yiming Lei,a Jinyu Shi,a, b Jie Zhanga, * and Jingyang Wanga
Pages : 1-7
DOI: 10.1080/0371750X.2025.2462819 |
| Abstract |
| Cr2AlC, one of Al-containing MAX phases, was considered as an attractive coating
candidate on Zry-4 alloys for accident tolerant fuel applications to enhance safety
response under a loss of coolant accident. Cr, Nb and Mo were selected as the buffer
layers between Cr2AlC coating and Zry-4 alloy, in order to extend the coating lifetime
at elevated temperature (>900oC). The thermal compatibility of buffer layers in contact
with Zry-4 alloy was investigated, and Cr was preferentially selected. Moreover, the
feasibility of Cr coating as buffer layer between Zry-4 alloy and Cr2AlC coating was
evaluated. Cr/Cr2AlC coating in high-temperature water vapour environment exhibited
comparable oxidation resistance to the bulk Cr2AlC, and the parabolic rate constant
decreased by two orders of magnitude compared to the zirconium alloy.
[Keywords: Accident tolerant fuel, Cr2AlC coating, Buffer layer, High-temperature water
vapour oxidation] |
| Full text : Subscribe to Download Full Text |
| [Go Back] |
|
