Plasma and Fusion Research

Volume 16, 1206001 (2021)

Rapid Communications

Tungsten Large-Scale Fiberform Nanostructures Retained under High Temperature Conditions
Tatsuki OKUYAMA, Shin KAJITA1), Naoaki YOSHIDA2), Hirohiko TANAKA, Tatsuya KUWABARA and Noriyasu OHNO
Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
1)
IMaSS, Nagoya University, Nagoya 464-8603, Japan
2)
RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga-shi, Fukuoka 816-8580, Japan
(Received 24 November 2020 / Accepted 8 December 2020 / Published 12 January 2021)

Abstract

Large-scale fiberform nanostructures (LFN) are formed on the tungsten (W) surface with He-W codeposition environments. In this study, we conducted annealing experiments at 1473 - 1673 K for 30 min using an infrared heating furnace. It was found that the LFN retained their structures after annealing at 1673 K. Through detailed observations using an optical microscope, a scanning electron microscope (SEM), and a transmission electron microscope (TEM), the morphological changes are discussed in relation to the high-temperature stability.

Keywords

He-W co-deposition, fuzz, tungsten, annealing, LFN

DOI: 10.1585/pfr.16.1206001

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