• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2023 Fiscal Year Final Research Report

Development of high toughness tungsten material to withstand multiple irradiation of 3MeV beams

Research Project

  • PDF
Project/Area Number 21H01069
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 14020:Nuclear fusion-related
Research InstitutionJapan Atomic Energy Agency

Principal Investigator

Hirano Koichiro  国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 J-PARCセンター, 研究副主幹 (30446463)

Co-Investigator(Kenkyū-buntansha) 江里 幸一郎  国立研究開発法人量子科学技術研究開発機構, 那珂研究所 ITERプロジェクト部, グループリーダー (30354624)
徳永 和俊  九州大学, 応用力学研究所, 准教授 (40227583)
福田 誠  国立研究開発法人量子科学技術研究開発機構, 那珂研究所 ITERプロジェクト部, 主任研究員 (70757666)
Project Period (FY) 2021-04-01 – 2024-03-31
Keywordsビームターゲット / ビーム照射試験 / ダイバータ / タングステン
Outline of Final Research Achievements

Eater grade tungsten samples, potassium doped samples, and recrystallized samples were irradiated with short pulsed hydrogen negative ion beams with a maximum energy flow rate of 0.64 MJ/m2 and a repetition rate of 5 Hz, and the damage to the samples due to multiple irradiations was evaluated. The surface and cross-section of these samples were observed and analyzed. It was found that the surface cracks were reticulate along the grain boundaries, and the cross-sectional cracks also propagated along the grain boundaries. The differences in the cracking between the different samples were also clarified. In addition, to overcome such cracking, we tried to make a high-toughness tungsten material by precipitating TiC on the grain boundary of tungsten to strengthen intergranular bonding.

Free Research Field

加速器

Academic Significance and Societal Importance of the Research Achievements

ITER用タングステン材料の基礎的なデータを取得することにより、ITERダイバータやビームターゲットの寿命評価を行うことができる。国外研究所のCERNでも、熱負荷10 MW/m2以上に耐久するターゲット材料が熱望されており、高靭性タングステン材料はダイバータの材料の他、国内外の大強度ビームのターゲット材料として、幅広い利用が期待される。

URL: 

Published: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi