|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advances in Multi-Principal Elements Alloys X
||Tailoring high entropy alloys for Advanced Technology fuel (ATF) coatings
||Jack Wilson, Lee Evitts, Michael Rushton, William Lee, David Goddard, Simon Middleburgh
|On-Site Speaker (Planned)
The zirconium-water reaction is a concern for LWRs, especially during a loss-of-coolant accident (LOCA) where cladding outer temperatures are significantly higher than during normal operation. The prevention or reduction of this reaction is sought with the use of certain Advanced Technology Fuels (ATFs) concepts. High-entropy alloys (HEAs) are being investigated as a candidate material for this purpose. In this work, we investigate the potential for HEAs as an interlayer between the protective Cr and Zr substrate. We examine key properties of HEAs including thermal expansion, interdiffusion and thermodynamics, ensuring brittle phase formation is avoided. We have shown that atomic scale modelling techniques such as density functional theory can be used to reliably predict thermal expansion of a range of BCC HEAs relevant to this innovation and thermodynamic and kinetic information is being combined to ensure the optimal material is selected.
||High-Entropy Alloys, High-Temperature Materials, Joining