| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Refractory Metals 2023
|
| Presentation Title |
J-104: Investigating Heat-treatment and Strain Path Effects on the Recrystallization of High-purity Niobium |
| Author(s) |
Zackery L. Thune, Conor McKinney, Nathan Fleming, Thomas R Bieler |
| On-Site Speaker (Planned) |
Thomas R Bieler |
| Abstract Scope |
Improving accelerator performance relies on the consistent production of high-purity niobium superconducting radiofrequency (SRF) cavities. The current production standards involve a post-purification and recrystallization heat-treatment at 800°C for 3-hours; however, recent work has shown significant improvement in cavity performance when annealing between 900°C and 1000°C. Recrystallization is a thermally activated process, therefore increasing the annealing temperature and/or the heating rate should facilitate a greater reduction in the density of geometrically necessary dislocations (GNDs) which are strongly associated with the degradation of cavity performance via trapped magnetic flux. The goal of this study is to increase the SRF community’s understanding of the influence which annealing temperature, heating rate, and strain path have on the recrystallization behavior in high-purity niobium. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Characterization, Other, Other |