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	2015/08
形態種別	論文
査読	査読あり
標題	Effect of temperature on microstructures and retention properties in tungsten exposed to D plus He plus Be mixture plasmas in PISCES
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
出版社・発行元	ELSEVIER SCIENCE BV
巻・号・頁	463,pp.979-982
国際共著	国際共著
著者・共著者	N. Iijima,M. Miyamoto,D. Nishijima,M. J. Baldwin,R. P. Doerner,Y. Ueda,A. Sagara,T. Hoeschen
概要	The influence of temperature on microstructures and D retention properties in tungsten exposed to D + He + Be mixture plasmas is investigated. For the low temperature exposure case at 573 K, the Be seeding to D + He mixture plasmas results in the suppression of high density He nano-bubbles, which are distinctive internal defects observed in He irradiated/exposed metals. In contrast, fine and high-density He bubbles appear for W exposed to D + He + Be mixture plasmas at higher temperatures of >773 K. TDS measurements also show that the influence of Be seeding to D + He mixture plasmas, which counteracts the significant reduction in D retention, becomes weak with increasing temperature. From XPS analyses, it is considered that Be2W is formed by interdiffusion and solid-state-reaction at the high temperature exposure case, and the influence of the metallic Be on surface properties gradually disappears with increasing temperature. (C) 2014 Elsevier B.V. All rights reserved.
DOI	10.1016/j.jnucmat.2014.10.099
ISSN	0022-3115/1873-4820