Role of Nb in improving the cyclic stability of V-Ti-Cr alloys

• 資料種別: 記事
• タイトル: Role of Nb in improving the cyclic stability of V-Ti-Cr alloys
• 著者・編者: Hyunjeong Kim; Kouji Sakaki; Kohta Asano
• 出版事項: 日本 : 高輝度光科学研究センター
• 出版年月日等: 2020-08-21
• 出版年（W3CDTF）: 2020-08-21
• タイトル（掲載誌）: SPring-8/SACLA利用研究成果集
• 巻号年月日等（掲載誌）: 8(2)
• 掲載巻: 8(2)
• ISSN（掲載誌）: 2187-6886
• ISSN-L（掲載誌）: 2187-6886
• 本文の言語コード: eng
• DOI: 10.18957/rr.8.2.187; https://doi.org/10.18957/rr.8.2.187
• 国立国会図書館永続的識別子: info:ndljp/pid/11670541; https://dl.ndl.go.jp/pid/11670541
• コレクション（共通）: 障害者向け資料
• コレクション（障害者向け資料：レベル1）: テキストデータ
• コレクション（個別）: 国立国会図書館デジタルコレクション > 電子書籍・電子雑誌 > その他; https://dl.ndl.go.jp/collections/B00035
• 収集根拠: オンライン資料収集制度
• 受理日（W3CDTF）: 2021-05-13T20:29:08+09:00
• 保存日（W3CDTF）: 2020-09-26
• 記録形式（IMT）: application/pdf
• オンライン閲覧公開範囲: 国立国会図書館内限定公開
• デジタル化資料送信: 図書館・個人送信対象外
• 遠隔複写可否（NDL）: 可
• 掲載誌（URI）: https://user.spring8.or.jp/resrep/
• 掲載誌（国立国会図書館永続的識別子）: info:ndljp/pid/11670537; https://dl.ndl.go.jp/pid/11670537
• 連携機関・データベース: 国立国会図書館 : 国立国会図書館デジタルコレクション; https://dl.ndl.go.jp

• 要約等: The degradation of reversible hydrogen storage capacity of V-Ti-Cr alloys can be greatly reduced by dissolving a small amount of Nb, yet the exact role of Nb in improving cyclic stability is not known. In this study, we have investigated local structural changes in V_0.25Ti_0.25Cr_0.5H₂ and V_0.25Ti_0.25Cr_0.45Nb_0.05H₂during hydrogen cycling using the X-ray atomic pair distribution function and the extended X-ray absorption fine structure spectra to understand the effect of Nb. Our study suggests that during hydrogen cycling large Ti atoms are dragged to dislocation cores to reduce strain induced by dislocations. This leaves Ti-poor regions near dislocations for which higher hydrogen gas pressure is required for hydrogen uptake. It is most probable that Nb prevents the segregation of Ti.
• DOI: 10.18957/rr.8.2.187
• オンライン閲覧公開範囲: インターネット公開
• 連携機関・データベース: 科学技術振興機構 : J-STAGE; http://www.jstage.jst.go.jp

• 要約等: The degradation of reversible hydrogen storage capacity of V-Ti-Cr alloys can be greatly reduced by dissolving a small amount of Nb, yet the exact role of Nb in improving cyclic stability is not known. In this study, we have investigated local structural changes in V_0.25Ti_0.25Cr_0.5H₂ and V_0.25Ti_0.25Cr_0.45Nb_0.05H₂during hydrogen cycling using the X-ray atomic pair distribution function and the extended X-ray absorption fine structure spectra to understand the effect of Nb. Our study suggests that during hydrogen cycling large Ti atoms are dragged to dislocation cores to reduce strain induced by dislocations. This leaves Ti-poor regions near dislocations for which higher hydrogen gas pressure is required for hydrogen uptake. It is most probable that Nb prevents the segregation of Ti.
• DOI: 10.18957/rr.8.2.187; https://doi.org/10.18957/rr.8.2.187
• 関連情報（URI）: http://id.ndl.go.jp/digimeta/11670541; https://dl.ndl.go.jp/pid/11670541
• 連携機関・データベース: 国立情報学研究所 : CiNii Research; https://cir.nii.ac.jp/
• 提供元機関・データベース: Japan Link Center; https://japanlinkcenter.org/top; 雑誌記事索引データベース; https://ndlsearch.ndl.go.jp; CiNii Articles
• 書誌ID（NDLBibID）: 11670541; http://id.ndl.go.jp/bib/11670541
• NII論文ID: 130007969642