Atomic-scale origin and multiscale evolution of non-electrochemical dissolution of metals in molten salts
Non-electrochemical dissolution (NED) of metals in melts is ubiquitous in daily life. Here, taking Ti dissolution in molten salts as an example, we decipher the mechanisms of NED of metals in molten salts. We discover that beyond the chemical dissolution, the unexpected physical dissolution appears...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425019209 |
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| author | Rui Yuan Handong Jiao Ruiyang Sun Leyang Li Qi Wang Donghua Tian Xuefeng Zhang Dongbai Sun Shuqiang Jiao |
| author_facet | Rui Yuan Handong Jiao Ruiyang Sun Leyang Li Qi Wang Donghua Tian Xuefeng Zhang Dongbai Sun Shuqiang Jiao |
| author_sort | Rui Yuan |
| collection | DOAJ |
| description | Non-electrochemical dissolution (NED) of metals in melts is ubiquitous in daily life. Here, taking Ti dissolution in molten salts as an example, we decipher the mechanisms of NED of metals in molten salts. We discover that beyond the chemical dissolution, the unexpected physical dissolution appears in molten salts. The physical dissolution originates predominantly from atomic thermal fluctuations at elevated temperatures, which weaken metallic bonds and intensify ion collisions with the metal matrix. Moreover, preferential dissolution occurs not only at grain boundaries but also on a specific crystal plane, which is attributed to its stronger halide adsorption affinity. Furthermore, the synergistic interplay between preferential dissolution and residual stress release triggers the slip-dissolution process, causing the Ti surface morphology to gradually evolve into characteristic terraces and dents. The findings clarify the atomic-scale origin and multiscale evolution of NED of metals in molten salts, laying the foundation for precise regulation of metal dissolution. |
| format | Article |
| id | doaj-art-a24ee68b9d244ef1ae37732b980cff87 |
| institution | DOAJ |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-a24ee68b9d244ef1ae37732b980cff872025-08-20T02:47:27ZengElsevierJournal of Materials Research and Technology2238-78542025-09-013870270910.1016/j.jmrt.2025.07.262Atomic-scale origin and multiscale evolution of non-electrochemical dissolution of metals in molten saltsRui Yuan0Handong Jiao1Ruiyang Sun2Leyang Li3Qi Wang4Donghua Tian5Xuefeng Zhang6Dongbai Sun7Shuqiang Jiao8Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing, 100081, PR ChinaInstitute of Advanced Structure Technology, Beijing Institute of Technology, Beijing, 100081, PR China; Corresponding author.Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing, 100081, PR ChinaInstitute of Advanced Structure Technology, Beijing Institute of Technology, Beijing, 100081, PR ChinaSouthern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519082, PR ChinaNational Center for Materials Service Safety, University of Science and Technology Beijing, Beijing, 100083, PR ChinaCollege of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, PR ChinaSouthern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519082, PR China; Corresponding author.State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, PR China; Corresponding author.Non-electrochemical dissolution (NED) of metals in melts is ubiquitous in daily life. Here, taking Ti dissolution in molten salts as an example, we decipher the mechanisms of NED of metals in molten salts. We discover that beyond the chemical dissolution, the unexpected physical dissolution appears in molten salts. The physical dissolution originates predominantly from atomic thermal fluctuations at elevated temperatures, which weaken metallic bonds and intensify ion collisions with the metal matrix. Moreover, preferential dissolution occurs not only at grain boundaries but also on a specific crystal plane, which is attributed to its stronger halide adsorption affinity. Furthermore, the synergistic interplay between preferential dissolution and residual stress release triggers the slip-dissolution process, causing the Ti surface morphology to gradually evolve into characteristic terraces and dents. The findings clarify the atomic-scale origin and multiscale evolution of NED of metals in molten salts, laying the foundation for precise regulation of metal dissolution.http://www.sciencedirect.com/science/article/pii/S2238785425019209Non-electrochemical dissolutionDissolution dynamicsAtomic-scale originMultiscale evolution |
| spellingShingle | Rui Yuan Handong Jiao Ruiyang Sun Leyang Li Qi Wang Donghua Tian Xuefeng Zhang Dongbai Sun Shuqiang Jiao Atomic-scale origin and multiscale evolution of non-electrochemical dissolution of metals in molten salts Journal of Materials Research and Technology Non-electrochemical dissolution Dissolution dynamics Atomic-scale origin Multiscale evolution |
| title | Atomic-scale origin and multiscale evolution of non-electrochemical dissolution of metals in molten salts |
| title_full | Atomic-scale origin and multiscale evolution of non-electrochemical dissolution of metals in molten salts |
| title_fullStr | Atomic-scale origin and multiscale evolution of non-electrochemical dissolution of metals in molten salts |
| title_full_unstemmed | Atomic-scale origin and multiscale evolution of non-electrochemical dissolution of metals in molten salts |
| title_short | Atomic-scale origin and multiscale evolution of non-electrochemical dissolution of metals in molten salts |
| title_sort | atomic scale origin and multiscale evolution of non electrochemical dissolution of metals in molten salts |
| topic | Non-electrochemical dissolution Dissolution dynamics Atomic-scale origin Multiscale evolution |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425019209 |
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