| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Self-organizing Nano-architectured Materials
|
| Presentation Title |
Elucidating the Kinetics for Three-dimensional Bicontinuous Structures Formation
in Molten Salt Dealloying via In Situ Synchrotron X-ray Nano-tomography
|
| Author(s) |
Xiaoyang Liu, Arthur Ronne, Kaustubh Bawane, Xiaoyin Zheng, Yang Liu, Lin-Chieh Yu, Mingyuan Ge, Phillip Halstenberg, Xianghui Xiao, Shannon Mahurin, Sheng Dai, Wah-Keat Lee, James Wishart, Lingfeng He, Yu-chen Karen Chen-Wiegart |
| On-Site Speaker (Planned) |
Xiaoyang Liu |
| Abstract Scope |
Three-dimensional (3D) nanoporous metals have been drawing research interests both for intriguing fundamental sciences and for their potential applications in catalysts, sensors, battery and supercapacitor materials. To-date, numerous dealloying methods such as chemical/electrochemical dealloying, liquid metal dealloying, solid-state interfacial dealloying and vapor phase dealloying have been developed to fabricate various porous metals. The present study utilizes the corrosive nature of molten salts to create porous Ni forming from dealloying a Ni-20Cr alloy at 800℃ in molten chloride salts. With in situ synchrotron X-ray nano-tomography studies, the possible rate-determining step was determined to be the long-range diffusion. Further in situ study was conducted at lower temperatures (500 and 600℃) combined with high-resolution transmission electron microscopy characterization to understand the influence of temperature on the chemical dissolution and surface diffusion. This study provides new insights on molten salt dealloying for potential functional materials fabrication. |
| Proceedings Inclusion? |
Undecided |