Grain orientations and grain boundaries in tungsten nonotendril fuzz grown under divertor-like conditions

Chad M. Parish; Kun Wang; Russel P. Doerner; Matthew J. Baldwin

doi:10.1016/j.scriptamat.2016.09.018

Grain orientations and grain boundaries in tungsten nonotendril fuzz grown under divertor-like conditions

Chad M. Parish, Kun Wang, Russel P. Doerner, Matthew J. Baldwin

Nuclear Energy Materials Microanalysis

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

Abstract

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. 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.

Original language	English
Pages (from-to)	132-135
Number of pages	4
Journal	Scripta Materialia
Volume	127
DOIs	https://doi.org/10.1016/j.scriptamat.2016.09.018
State	Published - Jan 15 2017

Funding

CMP and KW supported by an Early Career Award, US Department of Energy, Office of Science, Fusion Energy Sciences under contract number DE-AC05-00OR22725 . RPD and MJB supported by DE-FG02-07ER54912. We thank Prof B. Wirth, Dr. X. Hu., and Dr. D. Leonard for constructive criticism and discussions.

Funders	Funder number
US Department of Energy
Office of Science
Fusion Energy Sciences	DE-AC05-00OR22725, DE-FG02-07ER54912

Keywords

Fusion
Fusion energy
Plasma simulation
Transmission Kikuchi diffraction
Tungsten

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.scriptamat.2016.09.018

Cite this

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title = "Grain orientations and grain boundaries in tungsten nonotendril fuzz grown under divertor-like conditions",

abstract = "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. 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.",

keywords = "Fusion, Fusion energy, Plasma simulation, Transmission Kikuchi diffraction, Tungsten",

author = "Parish, {Chad M.} and Kun Wang and Doerner, {Russel P.} and Baldwin, {Matthew J.}",

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T1 - Grain orientations and grain boundaries in tungsten nonotendril fuzz grown under divertor-like conditions

AU - Parish, Chad M.

AU - Wang, Kun

AU - Doerner, Russel P.

AU - Baldwin, Matthew J.

PY - 2017/1/15

Y1 - 2017/1/15

N2 - 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. 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.

AB - 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. 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.

KW - Fusion

KW - Fusion energy

KW - Plasma simulation

KW - Transmission Kikuchi diffraction

KW - Tungsten

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DO - 10.1016/j.scriptamat.2016.09.018

M3 - Article

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VL - 127

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JO - Scripta Materialia

JF - Scripta Materialia

ER -

Grain orientations and grain boundaries in tungsten nonotendril fuzz grown under divertor-like conditions

Abstract

Funding

Keywords

UN SDGs

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