【公開日：2025.06.10】【最終更新日：2025.05.14】
課題データ / Project Data
課題番号 / Project Issue Number
24HK0151
利用課題名 / Title
Studies on microstructural evolution in electron-irradiated metallic materials and superconductors.
利用した実施機関 / Support Institute
北海道大学 / Hokkaido Univ.
機関外・機関内の利用 / External or Internal Use
外部利用/External Use
技術領域 / Technology Area
【横断技術領域 / Cross-Technology Area】（主 / Main）計測・分析/Advanced Characterization（副 / Sub）加工・デバイスプロセス/Nanofabrication
【重要技術領域 / Important Technology Area】（主 / Main）量子・電子制御により革新的な機能を発現するマテリアル/Materials using quantum and electronic control to perform innovative functions（副 / Sub）-
キーワード / Keywords
表面・界面・粒界制御/ Surface/interface/grain boundary control,電子顕微鏡/ Electronic microscope,電子回折/ Electron diffraction,超伝導/ Superconductivity,集束イオンビーム/ Focused ion beam,スパッタリング/ Sputtering
利用者と利用形態 / User and Support Type
利用者名（課題申請者）/ User Name (Project Applicant)
FENG Qianfei
所属名 / Affiliation
University of Science and Technology Beijing
共同利用者氏名 / Names of Collaborators in Other Institutes Than Hub and Spoke Institutes
Prof. Naoyuki HASHIMOTO,Prof. Wentuo HAN,Prof. Farong WAN,Prof. Hiroshi OKA,Prof. Shigehito ISOBE
ARIM実施機関支援担当者 / Names of Collaborators in The Hub and Spoke Institutes
Prof. Naoyuki HASHIMOTO
利用形態 / Support Type
（主 / Main）機器利用/Equipment Utilization（副 / Sub）,技術補助/Technical Assistance
利用した主な設備 / Equipment Used in This Project
HK-403：集束イオンビーム加工装置
HK-103：マルチビーム超高圧電子顕微鏡
報告書データ / Report
概要（目的・用途・実施内容）/ Abstract (Aim, Use Applications and Contents)
Copper (Cu) alloys, as promising candidate materials for divertors in International Thermonuclear Experimental Reactor (ITER), are typically required with sufficient high-temperature mechanical properties, excellent thermal conductivity as well as the capability of resisting high-flux neutron irradiation. One of the most challenging issues is radiation-induced swelling. Numerous methodologies, for instance, interface engineering, grain boundary engineering, etc., have been developed to introduce artificial defects to mitigate swelling. Although certain progresses have been made in the past few decades, principles behind which crystal defects contribute to resistance of radiation swelling remains unclear. This study focuses on the interaction of oxide particles with radiation-induced defects based on Cu/Cu alloys via high voltage electron microscope (HVEM).
実験 / Experimental
Alloying powders for pure Cu, oxide-dispersion strengthened (ODS) Cu and zirconium (Zr) additioning ODS-Cu samples were mechanically alloyed via a planetary ball mill. The prepared powders were prepared and sintered respectively for pure Cu, ODS-Cu and ODS-Cu(Zr) using spark plasma sintering (SPS) at 880℃. Specimens for electron irradiation were fabricated using focused ion beam. In-situ electron irradiation and imaging were carried out by the HVEM (JEM-ARM1300) at Hokkaido University.
結果と考察 / Results and Discussion
Massive void swelling was determined in all three specimens with damage dose reaching 3.13 dpa at 573K. However, after similar doses of electron irradiation, the volumetric swelling, void sizes and distributions in three individual samples differ due to the introduction of ODS particles and the addition of Zr. Largest swelling (0.63%) with uneven distribution of void was observed in ODS-Cu while Zr-additioning ODS-Cu appears the lowest swelling of 0.06%.
図・表・数式 / Figures, Tables and Equations
その他・特記事項（参考文献・謝辞等） / Remarks(References and Acknowledgements)
成果発表・成果利用 / Publication and Patents
論文・プロシーディング（DOIのあるもの） / DOI (Publication and Proceedings)
口頭発表、ポスター発表および、その他の論文 / Oral Presentations etc.
- Qianfei Feng, Wentuo Han, Farong Wan, Hiroshi Oka, Shigehito Isobe, Naoyuki Hashimoto, Zimo Gao, Diancheng Geng, Ryuta Kasada, ICFRM-22 (Shizuoka, Japan) 令和7年9月28日
特許 / Patents
特許出願件数 / Number of Patent Applications：0件
特許登録件数 / Number of Registered Patents：0件