Role of Nb in improving the cyclic stability of V-Ti-Cr alloys
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DOI[10.18957/rr.8.2.187]to the data of the same series
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- Material Type
- 記事
- Author/Editor
- Hyunjeong KimKouji SakakiKohta Asano
- Publication, Distribution, etc.
- Publication Date
- 2020-08-21
- Publication Date (W3CDTF)
- 2020-08-21
- Periodical title
- SPring-8/SACLA利用研究成果集
- No. or year of volume/issue
- 8(2)
- Volume
- 8(2)
- ISSN (Periodical Title)
- 2187-6886
- ISSN-L (Periodical Title)
- 2187-6886
- Text Language Code
- eng
- DOI
- 10.18957/rr.8.2.187
- Persistent ID (NDL)
- info:ndljp/pid/11670541
- Collection
- Collection (Materials For Handicapped People:1)
- Collection (particular)
- 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
- Acquisition Basis
- オンライン資料収集制度
- Date Accepted (W3CDTF)
- 2021-05-13T20:29:08+09:00
- Date Captured (W3CDTF)
- 2020-09-26
- Format (IMT)
- application/pdf
- Access Restrictions
- 国立国会図書館内限定公開
- Service for the Digitized Contents Transmission Service
- 図書館・個人送信対象外
- Availability of remote photoduplication service
- 可
- Periodical Title (URI)
- Periodical Title (Persistent ID (NDL))
- info:ndljp/pid/11670537
- Data Provider (Database)
- 国立国会図書館 : 国立国会図書館デジタルコレクション
- Summary, etc.
- 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<sub>0.25</sub>Ti<sub>0.25</sub>Cr<sub>0.5</sub>H<sub>2</sub> and V<sub>0.25</sub>Ti<sub>0.25</sub>Cr<sub>0.45</sub>Nb<sub>0.05</sub>H<sub>2 </sub>during 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
- Access Restrictions
- インターネット公開
- Data Provider (Database)
- 科学技術振興機構 : J-STAGE
- Summary, etc.
- 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<sub>0.25</sub>Ti<sub>0.25</sub>Cr<sub>0.5</sub>H<sub>2</sub> and V<sub>0.25</sub>Ti<sub>0.25</sub>Cr<sub>0.45</sub>Nb<sub>0.05</sub>H<sub>2 </sub>during 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
- Related Material (URI)
- Data Provider (Database)
- 国立情報学研究所 : CiNii Research
- Original Data Provider (Database)
- Japan Link Center雑誌記事索引データベースCiNii Articles
- Bibliographic ID (NDL)
- 11670541
- NAID
- 130007969642