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Meeting 2027 TMS Annual Meeting & Exhibition
Symposium Materials and Chemistry for Molten Salt Systems
Presentation Title Multimodal In Situ Synchrotron Investigation of Interface Evolution Between Zr and Ni–Cr Alloys in Molten LiCl–KCl
Author(s) Yuxiang Peng, Ankita Mohanty, Ellie Kim, Phillip Halstenberg, Bobby Layne, Weixuan Huang , Akhil Tayal, Jorge Moncada Vivas , Xianghui Xiao , Zhongshu Ren, Mingyuan Ge, Sheng Dai , Anatoly Frenkel , James F. Wishart, Yu-chen Karen Chen-Wiegart
On-Site Speaker (Planned) Yuxiang Peng
Abstract Scope Chloride-based molten salts are promising for advanced energy systems. Reactive metallic species, including metallic fission products and corrosion-mitigating additives, can strongly influence the performance of structural alloys in these environments. Although intermetallic compounds are frequently observed at alloy–salt interfaces, the mechanisms governing their formation and subsequent interfacial evolution remain poorly understood. Here, Zr is employed as a model metallic species to investigate its interactions with Ni, Cr, and Ni–20Cr in molten LiCl–KCl using multimodal in situ synchrotron characterization, including X-ray nano-tomography, X-ray absorption spectroscopy (XANES/EXAFS), and X-ray diffraction. Quantitative image analysis, EXAFS, and diffraction refinement reveal the coupled morphological, chemical, and structural evolution during reaction, including intermetallic formation and elemental interdiffusion at alloy interfaces. These findings establish a mechanistic framework for understanding the evolution of reactive metallic species at alloy–salt interfaces in molten salt environments.
Proceedings Inclusion? Planned:
Keywords High-Temperature Materials, Nuclear Materials, Environmental Effects

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