Plasma and Fusion Research

Volume 11, 1206125 (2016)

Rapid Communications

In Situ TEM Observation of Helium Bubbles Collapsing on Nanostructured Tungsten during Annealing
Miyuki YAJIMA, Naoaki YOSHIDA, Shin KAJITA and Noriyasu OHNO
National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
(Received 23 June 2016 / Accepted 25 July 2016 / Published 26 December 2016)

Abstract

A fiberform nanostructured layer is formed on a tungsten (W) surface using helium (He) plasma irradiation. The behavior of the nanostructures and He bubbles were observed during annealing via in situ transmission electron microscopy. Notable changes in the nanostructures occurred at 1223 K. A collapse of the nanostructures was observed along with a collapse of the He bubbles during annealing.

Keywords

tungsten, fiberform nanostructure, annealing, transmission electron microscopy, helium bubble

DOI: 10.1585/pfr.11.1206125

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