Grain orientations and grain boundaries in tungsten nonotendril fuzz grown under divertor-like conditions
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of California - San Diego, La Jolla, CA (United States)
We grew nanotendril “fuzz” on tungsten via plasma exposure and performed transmission Kikuchi diffraction (tKD) in scanning electron microscopy of isolated nanotendrils. 900 °C, 1023 He/m2sec, 4 × 1026 He/m2 exposure of tungsten produced a deep and fully developed nanotendril mat. tKD of isolated nanotendrils indicated that there was no preferred crystallographic direction oriented along the long axes of the tendrils, and the grain boundary character showed slightly preferential orientations. In conclusion, tendril growth is sufficiently non-equilibrium to prevent any preference of growth direction to manifest measurably, and that new high-angle boundaries (with new grains and grain-growth axes) nucleate randomly along the tendrils during growth.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- Grant/Contract Number:
- AC05-00OR22725; FG02-07ER54912
- OSTI ID:
- 1326512
- Alternate ID(s):
- OSTI ID: 1397958
- Journal Information:
- Scripta Materialia, Vol. 127, Issue C; ISSN 1359-6462
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Periodic Surface Morphology Characteristics of Tungsten Under Simultaneous Helium and Deuterium Bombardment at 30 keV
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journal | May 2019 |
Selective laser melting of high-performance pure tungsten: parameter design, densification behavior and mechanical properties
|
journal | April 2018 |
He-ion induced surface morphology change and nanofuzz growth on hot tungsten surfaces
|
journal | December 2018 |
Morphologies of tungsten nanotendrils grown under helium exposure
|
journal | February 2017 |
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