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	2013/07
形態種別	論文
査読	査読あり
標題	Surface cracking and melting of different tungsten grades under transient heat and particle loads in a magnetized coaxial plasma gun
執筆形態	共著・編著（代表編著を除く）
掲載誌名	Journal of Nuclear Materials
掲載区分	国外
巻・号・頁	438(SUPPL),pp.S715-S718
著者・共著者	Y. Kikuchi,I. Sakuma,D. Iwamoto,Y. Kitagawa,N. Fukumoto,M. Nagata,Y. Ueda
概要	Surface damage of pure tungsten (W), W alloys with 2 wt.% tantalum (W-Ta) and vacuum plasma spray (VPS) W coating on a reduced activation material of ferritic steel (F82H) due to repetitive ELM-like pulsed (∼0.3 ms) deuterium plasma irradiation has been investigated by using a magnetized coaxial plasma gun. Surface cracks appeared on a pure W sample exposed to 10 plasma pulses of ∼0.3 MJ m 2, while a W-Ta sample did not show surface cracks with similar pulsed plasma irradiation. The energy density threshold for surface cracking was significantly increased by the existence of the alloying element of tantalum. No surface morphology change of a VPS W coated F82H sample was observed under 10 plasma pulses of ∼0.3 MJ m 2, although surface melting and cracks in the resolidification layer occurred at higher energy density of ∼0.9 MJ m 2.
DOI	10.1016/j.jnucmat.2013.01.151
ISSN	0022-3115