ウエダ　ヨシオ   Ueda Yoshio   上田　良夫    所属   追手門学院大学  理工学部 電気電子工学科    職種   教授
言語種別	英語
発行・発表の年月	2017/11/01
形態種別	論文
査読	査読あり
標題	Molten layer characteristics of W materials and film coated W by pulsed laser irradiation
執筆形態	共著・編著（代表編著を除く）
掲載誌名	Fusion Engineering and Design
掲載区分	国外
出版社・発行元	Elsevier Ltd
巻・号・頁	124,pp.316-320
著者・共著者	Daisuke Inoue,Kenzo Ibano,Satoru Yoshikawa,Takeru Maeji,Yoshio Ueda
概要	Molten layer characteristics were investigated for four W materials pure W, W-10wt%Re, W-2wt%Ta and W with Al coating. Specimens were irradiated by a Nd:YAG laser (wavelength 1064 nm) simulating transient heat loads such as ELMs and disruption. The power density of the heat loads were varied in the 2.3–6.6 GW/m2 range. Surface profiles were observed with a laser microscope. The central part of irradiated W-2wt%Ta became dented deeply in a wider range with increasing the power density in comparison with pure W and W-10wt%Re. This could be attributed to the release of Ta droplets by bumping (rapid boiling), closely related to microstructure and/or impurity concentration determined by the materials production processes. We also observed surface morphology changes of pure W with and without Al coating after irradiation in order to investigate the effect of the protective coatings.
DOI	10.1016/j.fusengdes.2017.03.160
ISSN	0920-3796