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Development of the W/ODS-Cu divertor heat removal component by using the Advanced Brazing Technique

Research Project

Project/Area Number 17K06997
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Nuclear fusion studies
Research InstitutionNational Institute for Fusion Science

Principal Investigator

Tokitani Masayuki  核融合科学研究所, ヘリカル研究部, 准教授 (30455208)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywordsプラズマ対向機器 / ダイバータ / ろう付接合 / 銅合金 / タングステン / プラズマ対向機器・加熱機器 / プラズマ・核融合 / ダイバータ受熱機器 / 接合
Outline of Final Research Achievements

Development of the divertor heat removal component in the reactor relevant conditions with tungsten (W) armour and oxide dispersion strengthened copper (ODS-Cu; GlidCop) heat sink by using the "advanced brazing technique" which was originally developed by our group was conducted. According to the microstructural analysis of the W/GlidCop joint, it was revealed that very fine joint without any cavities and clacks was formed, and the filler elements of Ni and P were almost disappeared from the joint interface due to the strong diffusion towards the GlidCop matrix. Since the very thin softening region was identified on the GlidCop matrix, vicinity of the joint interface, the softened region might act as the main role in the absorber of the residual stress. The small-scale W/GlidCop divertor mock-up fabricated by advanced brazing technique showed excellent heat removal capability under the ~24MW/m2 steady state heat loading condition.

Academic Significance and Societal Importance of the Research Achievements

熱膨張係数の異なるタングステン(W)と酸化物分散強化銅(GlidCop)を,残留応力を吸収する中間層無しで直接接合できる「先進的ろう付接合法」の接合原理はこれまで明らかになっておらず,学術的な問いであった.この問いに対して,微細構造解析を駆使することでその接合メカニズムを明らかにすることに成功した.また,この接合法はWとGlidCopの接合だけでなく,GlidCop同士やその他の金属の接合に対しても広く応用できることが明らかになった.この接合法は,核融合炉のダイバータ受熱機器開発のみならず,銅合金の接合構造が必要な様々な分野に応用できる可能性があり,産業応用や分野間連携への拡大が期待できる.

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (23 results)

All 2020 2019 2018 2017

All Journal Article (8 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 8 results,  Open Access: 3 results,  Acknowledgement Compliant: 1 results) Presentation (12 results) (of which Int'l Joint Research: 9 results,  Invited: 1 results) Patent(Industrial Property Rights) (3 results)

  • [Journal Article] Surface morphology of the bulk tungsten divertor tiles from JET ITER-like wall2020

    • Author(s)
      Tokitani M、Miyamoto M、Masuzaki S、Hatano Y、Lee S E、Oya Y、Otsuka T、Oyaidzu M、Kurotaki H、Suzuki T、Hamaguchi D、Hayashi T、Asakura N、Widdowson A、Jachmich S、Rubel M、JET Contributors
    • Journal Title

      Physica Scripta

      Volume: T171 Pages: 014010-014010

    • DOI

      10.1088/1402-4896/ab3d09

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Leak tight joint procedures for ODS-Cu/ODS-Cu by the advanced brazing technique2019

    • Author(s)
      M. Tokitani, Y. Hamaji, Y. Hiraoka, S. Masuzaki, H. Tamura, H. Noto, T. Tanaka, T. Muroga, A. Sagara, the FFHR Design Group
    • Journal Title

      Fusion Engineering and Design

      Volume: 148 Pages: 111274-111274

    • DOI

      10.1016/j.fusengdes.2019.111274

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Demonstration of suppression of dust generation and partial reduction of the hydrogen retention by tungsten coated graphite divertor tiles in LHD2019

    • Author(s)
      M. Tokitani, S. Masuzaki, T. Murase, the LHD Experiment Group
    • Journal Title

      Nuclear Materials and Energy

      Volume: 18 Pages: 23-28

    • DOI

      10.1016/j.nme.2018.11.023

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Deformation and fracture behavior of the W/ODS-Cu joint fabricated by the advanced brazing technique2019

    • Author(s)
      M. Tokitania, Y. Hamaji, Y. Hiraoka, S. Masuzaki, H. Tamura, H. Noto, T. Tanaka, T. Muroga, A. Sagara, the FFHR Design Group
    • Journal Title

      Fusion Engineering and Design

      Volume: 印刷中 Pages: 1733-1736

    • DOI

      10.1016/j.fusengdes.2019.03.027

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Plasma-wall interaction on the divertor tiles of JET ITER-like wall from the viewpoint of micro/nanoscopic observations2018

    • Author(s)
      M. Tokitani , M. Miyamoto, S. Masuzaki, R. Sakamoto, Y. Oya, Y. Hatano, T. Otsuka, M. Oyaidzu, H. Kurotaki, T. Suzuki, D. Hamaguchi, K. Isobe, N. Asakura, A. Widdowson, K. Heinola, M. Rubel, JET Contributors
    • Journal Title

      Fusion Engineering and Design

      Volume: 136 Pages: 199-204

    • DOI

      10.1016/j.fusengdes.2018.01.051

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Fabrication of divertor mock-up with ODS-Cu and W by the improved brazing technique2017

    • Author(s)
      M. Tokitani, Y. Hamaji, Y. Hiraoka, S. Masuzaki, H. Tamura, H. Noto, T. Tanaka, T. Muroga, A. Sagara, FFHR Design Group
    • Journal Title

      Nuclear Fusion

      Volume: 57 Issue: 7 Pages: 076009-076009

    • DOI

      10.1088/1741-4326/aa6bb3

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Initial growth phase of W-fuzz formation in ultra-long pulse helium discharge in LHD2017

    • Author(s)
      M. Tokitani, S. Masuzaki, H. Kasahara, Y. Yoshimura, R. Sakamoto, N. Yoshida, Y. Ueda , T. Mutoh, LHD Experiment Group , S. Nagata
    • Journal Title

      Nuclear Materials and Energy

      Volume: 印刷中 Pages: 1358-1362

    • DOI

      10.1016/j.nme.2016.11.023

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Micro-/nano-characterization of the surface structures on the divertor tiles from JET ITER-like wall2017

    • Author(s)
      M. Tokitani, M. Miyamoto, S. Masuzaki, Y. Fujii, R. Sakamoto, Y. Oya, Y. Hatano,T. Otsuka, M. Oyaidzu, H. Kurotaki, T. Suzuki, D. Hamaguchi, K. Isobe, N. Asakura,A. Widdowson, M. Rubel, JET Contributors
    • Journal Title

      Fusion Engineering and Design

      Volume: 116 Pages: 1-4

    • DOI

      10.1016/j.fusengdes.2017.01.002

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Microscopic analysis of surface morphologies on the tungsten bulk divertor from JET ITER-like wall2019

    • Author(s)
      M. Tokitani, M. Miyamoto, S. Masuzaki, Y. Hatano, S.E. Lee, Y. Oya, T. Otsuka, M. Oyaidzu, H. Kurotaki, T. Suzuki, D. Hamaguchi, T. Hayashi, N. Asakura, A. Widdowson, S. Jachmich, M. Rubel, JET Contributors
    • Organizer
      17th International Conference on Plasma-Facing Materials and Components for Fusion Applications (PFMC-17)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Leak Tight Joint Method for ODS-Cu/ODS-Cu by Application of the Advanced Brazing Technique2019

    • Author(s)
      M. Tokitani, Y. Hamaji, Y. Hiraoka, S. Masuzaki, H. Tamura, H. Noto, T. Tanaka, T. Muroga, A. Sagara, the FFHR Design Group
    • Organizer
      14th International Symposium on Fusion Nuclear Technologies (ISFNT-14)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Manufacturing Technologies for advanced PFMs relevant for DEMO2019

    • Author(s)
      M. Tokitani, H. Noto, T. Muroga, T. Hirai
    • Organizer
      6th IAEA DEMO Programme Workshop (DPWS-6)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Novel Fabrication Method for High Heat Flux Component by the Multi-Step Brazing Technique2019

    • Author(s)
      M. Tokitani, Y. Hamaji, Y. Hiraoka, S. Masuzaki, H. Tamura, H. Noto, T. Tanaka, T. Muroga, A. Sagara, the FFHR Design Group
    • Organizer
      The 19th International Conference on Fusion Reactor Materials (ICFRM-19)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] JET-ILW実験で使用されたWダイバータタイルおよびBeリミタタイルの微細構造2019

    • Author(s)
      M. Tokitani, M. Miyamoto, S. Masuzaki, Y. Hatano, Y. Oya, T. Otsuka, D. Hamaguchi, H. Kurotaki, M. Oyaidzu, T. Suzuki, T. Suzuki, T. Hayashi, N. Asakura, A. Widdowson, S. Jachmich, M. Rubel, JET Contributors
    • Organizer
      プラズマ・核融合学会第36回年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Demonstration of suppression of the dust generation and partly reduction of the hydrogen retention by tungsten coated graphite divertor tiles in LHD2018

    • Author(s)
      M. Tokitani, S. Masuzaki, T. Murase, the LHD Experiment Group
    • Organizer
      23rd International Conference on Plasma Surface Interactions in Controlled Fusion Devices
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Deformation and fracture behavior of the ODS-Cu/W joint fabricated by the improved brazing technique2018

    • Author(s)
      M. Tokitani, Y. Hamaji, Y. Hiraoka, S. Masuzaki, H. Tamura, H. Noto, T. Tanaka, T. Muroga, A. Sagara, the FFHR Design Group
    • Organizer
      30th Symposium on Fusion Technology
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Novel fabrication method of the W/ODS-Cu divertor by the advanced brazing technique2018

    • Author(s)
      M. Tokitani, Y. Hamaji, Y. Hiraoka, S. Masuzaki, H. Tamura, H. Noto, T. Tanaka, T. Muroga, A. Sagara, the FFHR Design Group
    • Organizer
      The 6th Korea-Japan Joint Workshop on Nuclear Materials - Materials Development for Advanced Nuclear Systems -
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 先進的ろう付接合法によるW/ODS-Cuダイバータ受熱機器の開発 ~接合部の変形・破断挙動および大型ダイバータ受熱機器の製造~2018

    • Author(s)
      時谷政行,浜地志憲,平岡 裕,増崎 貴,田村 仁,能登裕之,田中照也,室賀健夫,相良明男,FFHR設計グループ
    • Organizer
      第35回プラズマ・核融合学会年会
    • Related Report
      2018 Research-status Report
  • [Presentation] Development of the high heat flux component for a fusion reactor2017

    • Author(s)
      M. Tokitani, Y. Hamaji, Y. Hiraoka, S. Masuzaki, H. Tamura, H. Noto, T. Tanaka, T. Muroga, A. Sagara, FFHR Design Group
    • Organizer
      4th meeting of the Radiation Damage In Accelerator Target Environments (4th RaDIATE)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Plasma-wall interaction on the divertor tiles of JET ITER-like wall from the viewpoint of micro/nanoscopic observations2017

    • Author(s)
      M. Tokitani, M. Miyamoto, S. Masuzaki, R. Sakamoto, Y. Oya, Y. Hatano, T. Otsuka, M. Oyaidzu, H. Kurotaki, T. Suzuki, D. Hamaguchi, K. Isobe, N. Asakura, A. Widdowson, K. Heinola, M. Rubel, JET Contributors
    • Organizer
      13th International Symposium on Fusion Nuclear Technology
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] JET ILW対向材タイル表面の微細構造分析(II)2017

    • Author(s)
      時谷政行,宮本光貴,増崎貴,坂本隆一,大矢恭久,波多野雄治,大塚哲平,濱口大,黒滝宏紀,小柳津誠,鈴木卓美,鈴木達也,磯部兼嗣,朝倉伸幸,Anna Widdowson,Kalle Heinola,Marek Rubel
    • Organizer
      Plasma Conference 2017
    • Related Report
      2017 Research-status Report
  • [Patent(Industrial Property Rights)] アルミナ分散強化銅のろう付接合方法2019

    • Inventor(s)
      時谷政行
    • Industrial Property Rights Holder
      自然科学研究機構
    • Industrial Property Rights Type
      特許
    • Filing Date
      2019
    • Acquisition Date
      2019
    • Related Report
      2019 Annual Research Report
  • [Patent(Industrial Property Rights)] アルミナ分散強化銅のろう付接合方法2018

    • Inventor(s)
      時谷政行
    • Industrial Property Rights Holder
      自然科学研究機構
    • Industrial Property Rights Type
      特許
    • Filing Date
      2018
    • Acquisition Date
      2019
    • Related Report
      2019 Annual Research Report
  • [Patent(Industrial Property Rights)] アルミナ分散強化銅のろう付接合方法2018

    • Inventor(s)
      時谷政行
    • Industrial Property Rights Holder
      時谷政行
    • Industrial Property Rights Type
      特許
    • Filing Date
      2018
    • Related Report
      2018 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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