Characterizing the recovery of a solid surface after tungsten nano-tendril formation
Abstract
Here, recovery of a flat tungsten surface from a nano-tendril surface is attempted through three techniques; a mechanical wipe, a 1673 K annealing, and laser-induced thermal transients. Results were determined through SEM imaging and elastic recoil detection to assess the helium content in the surface. The mechanical wipe leaves a ~0.5 μm deep layer of nano-tendrils on the surface post-wipe regardless of the initial nano-tendril layer depth. Laser-induced thermal transients only significantly impact the surface morphology at heat loads of 35.2 MJ/m2 s1/2 or above, however a fully flat or recovered surface was not achieved for 100 transients at this heat load despite reducing the helium content by a factor of ~7. A 1673 K annealing removes all detectable levels of helium but sub-surface voids/bubbles remain intact. The surface is recovered to a nearly flat state with only some remnants of nano-tendrils re-integrating into the surface remaining.
- Authors:
-
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
- Dutch Institute For Fundamental Energy Research (DIFFER), Nieuwegein (Netherlands). EURATOM-FOM
- Publication Date:
- Research Org.:
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES); National Science Foundation (NSF)
- OSTI Identifier:
- 1897977
- Alternate Identifier(s):
- OSTI ID: 1252236
- Grant/Contract Number:
- SC0002060; DMR-0819762; SC00-02060
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Nuclear Materials
- Additional Journal Information:
- Journal Volume: 463; Journal ID: ISSN 0022-3115
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; Helium; Ion-surface interactions; Thermal shock; Tungsten fuzz
Citation Formats
Wright, G. M., van Eden, G. G., Kesler, L. A., De Temmerman, G., Whyte, D. G., and Woller, K. B. Characterizing the recovery of a solid surface after tungsten nano-tendril formation. United States: N. p., 2014.
Web. doi:10.1016/j.jnucmat.2014.11.083.
Wright, G. M., van Eden, G. G., Kesler, L. A., De Temmerman, G., Whyte, D. G., & Woller, K. B. Characterizing the recovery of a solid surface after tungsten nano-tendril formation. United States. https://doi.org/10.1016/j.jnucmat.2014.11.083
Wright, G. M., van Eden, G. G., Kesler, L. A., De Temmerman, G., Whyte, D. G., and Woller, K. B. Thu .
"Characterizing the recovery of a solid surface after tungsten nano-tendril formation". United States. https://doi.org/10.1016/j.jnucmat.2014.11.083. https://www.osti.gov/servlets/purl/1897977.
@article{osti_1897977,
title = {Characterizing the recovery of a solid surface after tungsten nano-tendril formation},
author = {Wright, G. M. and van Eden, G. G. and Kesler, L. A. and De Temmerman, G. and Whyte, D. G. and Woller, K. B.},
abstractNote = {Here, recovery of a flat tungsten surface from a nano-tendril surface is attempted through three techniques; a mechanical wipe, a 1673 K annealing, and laser-induced thermal transients. Results were determined through SEM imaging and elastic recoil detection to assess the helium content in the surface. The mechanical wipe leaves a ~0.5 μm deep layer of nano-tendrils on the surface post-wipe regardless of the initial nano-tendril layer depth. Laser-induced thermal transients only significantly impact the surface morphology at heat loads of 35.2 MJ/m2 s1/2 or above, however a fully flat or recovered surface was not achieved for 100 transients at this heat load despite reducing the helium content by a factor of ~7. A 1673 K annealing removes all detectable levels of helium but sub-surface voids/bubbles remain intact. The surface is recovered to a nearly flat state with only some remnants of nano-tendrils re-integrating into the surface remaining.},
doi = {10.1016/j.jnucmat.2014.11.083},
journal = {Journal of Nuclear Materials},
number = ,
volume = 463,
place = {United States},
year = {Thu Nov 27 00:00:00 EST 2014},
month = {Thu Nov 27 00:00:00 EST 2014}
}
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