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

Improvement of tungsten lifetime by coating with middle melting point materials

Research Project

Project/Area Number 26630473
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Nuclear fusion studies
Research InstitutionOsaka University

Principal Investigator

Ueda Yoshio  大阪大学, 工学(系)研究科(研究院), 教授 (30193816)

Project Period (FY) 2014-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywordsプラズマ対向材料 / タングステン / 中間融点堆積膜 / 蒸気遮蔽効果 / 保護層 / ディスラプション / 壁材料保護
Outline of Final Research Achievements

The following results were obtained. (1)Various W materials (pure W, W-2Ta, W-Re) were melted by a pulsed laser with ELM like heat pulses and their melt layer dynamics were studied. It was found that the least droplet ejection by bumping was observed for pure W. (2)W with thin Al coating layers (1 micrometer) was exposed to laser heat pulses and pulsed plasmas. Significant reduction of heat flux to W by evaporation heat of Al and vapor shielding effects by Al vapor was observed. (3)The vapor shielding effects of Be and W were successfully simulated by a newly developed PIC code. (4)W monoblocks for ITER with surface damage (cracking, melting made by pulsed plasmas and electron beam) were tested by cyclic high heat loading by electron beam. Heat flux of 20 MW/m^2 for 10 s was repeatedly applied for simulating slow transient heat pulsed in ITER. It was found that the W monoblocks with surface damage easily showed longitudinal cracks (self castellation).

Report

(3 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • Research Products

    (16 results)

All 2016 2015 2014 Other

All Int'l Joint Research (1 results) Journal Article (7 results) (of which Peer Reviewed: 2 results) Presentation (8 results) (of which Int'l Joint Research: 1 results)

  • [Int'l Joint Research] カリフォルニア大学サンディエゴ校(UCSD)(米国)

    • Related Report
      2015 Annual Research Report
  • [Journal Article] Surface modifications on toughened, fine-grained, recrystallized tungsten with repetitive ELM-like pulsed plasma irradiation2016

    • Author(s)
      Kikuchi, Y., Sakuma, I., Kitagawa, Y., Asai, Y., Onishi, K., Fukumoto, N., Nagata, M., Ueda, Y., Kurishita, H.
    • Journal Title

      Journal of Nuclear Materials

      Volume: 463 Pages: 206-209

    • DOI

      10.1016/j.jnucmat.2014.11.107

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Deuterium retention in tungsten coating layers irradiated with deuterium and carbon ions2015

    • Author(s)
      Fukumoto, M., Nakano, T., Ueda, Y., Itami, K., Kubo, H.
    • Journal Title

      Journal of Nuclear Materials

      Volume: 462 Pages: 354-359

    • DOI

      10.1016/j.jnucmat.2015.02.041

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed
  • [Journal Article] D-He-Be混合プラズマ環境下でのタングステンの微細組織と重水素保持特性2014

    • Author(s)
      宮本光貴,西島大輔,BALDWIN Matthew j.,DOERNER Russell P.,上田良夫,栗下裕明,吉田直亮,相良明男
    • Journal Title

      Journal of Plasma and Fusion Research

      Volume: 89 Pages: 335-340

    • NAID

      110009612747

    • Related Report
      2014 Research-status Report
  • [Journal Article] Current status of nanostructured tungsten-based materials development2014

    • Author(s)
      H Kurishita, S Matsuo, H Arakawa, T Sakamoto, S Kobayashi,K Nakai, H Okano, H Watanabe, N Yoshida, Y Torikai, Y Hatano,T Takida, M Kato, A Ikegaya, Y Ueda, M Hatakeyama and T Shikama
    • Journal Title

      Physica Scripta

      Volume: T159

    • Related Report
      2014 Research-status Report
  • [Journal Article] High-Heat-Flux Testing of Irradiated Tungsten-Based Materials for Fusion Applications Using Infrared Plasma Arc Lamps2014

    • Author(s)
      Adrian S. Sabau, Evan K. Ohriner, Jim Kiggans, Charles R. Schaich, Yoshio Ueda, David C. Harper, Yutai Katoh, Lance L. Snead
    • Journal Title

      Fusion Science and Technology

      Volume: 66 Pages: 394-404

    • Related Report
      2014 Research-status Report
  • [Journal Article] Deuterium retention in various toughened, fine-grained recrystallized tungsten materials under different irradiation conditions2014

    • Author(s)
      M Oya, H T Lee, Y Ohtsuka, Y Ueda, H Kurishita, M Oyaidzu and T Yamanishi
    • Journal Title

      M Oya, H T Lee, Y Ohtsuka, Y Ueda, H Kurishita, M Oyaidzu and T Yamanishi

      Volume: T159

    • Related Report
      2014 Research-status Report
  • [Journal Article] Surface erosion and modification of toughened, fine-grained, recrystallized tungsten exposed to TEXTOR edge plasma2014

    • Author(s)
      Y Ueda, M Oya, Y Hamaji, H T Lee, H Kurishita, Y Torikai, N Yoshida, A Kreter, J W Coenen, A Litnovsky and V Philipps
    • Journal Title

      Physica Scripta

      Volume: T159

    • Related Report
      2014 Research-status Report
  • [Presentation] Particle simulations for W, Mo and Be vapor shielding experiments2016

    • Author(s)
      KENZO IBANO, DAISUKE NISHIJIMA, JONATHAN YU, MATTHEW BALDWIN, RUSS DOERNER, HEUN TAE LEE, YOSHIO UEDA
    • Organizer
      22nd Meeting of ITPA DSOL-TG
    • Place of Presentation
      Frascati, Italy
    • Year and Date
      2016-01-25
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Pilot -PSI 装置における 定常・パルス複合プラズマ照射よるAl 被覆 W材料の蒸気層形成実験2015

    • Author(s)
      佐久間一行, 菊池祐介, T. W. Morgan1, K. Bystrov, 伊庭野健造, 上田良夫
    • Organizer
      第32回プラズマ・核融合学会年会
    • Place of Presentation
      名古屋大学
    • Year and Date
      2015-11-24
    • Related Report
      2015 Annual Research Report
  • [Presentation] 定常プラズマ照射下における溶融金属表面からの粒子放出と 蒸気遮蔽効果の観察2015

    • Author(s)
      伊庭野健造、西島大輔、Heun Tae Lee、上田良夫
    • Organizer
      第32回プラズマ・核融合学会年会
    • Place of Presentation
      名古屋大学
    • Year and Date
      2015-11-24
    • Related Report
      2015 Annual Research Report
  • [Presentation] ディスラプションを模擬したレーザー熱入射におけるタングステンの吸収率測定2015

    • Author(s)
      吉川悟, 伊庭野健造, Lee Heun Tae, 井上大輔, 前地剛, 上田良夫
    • Organizer
      第32回プラズマ・核融合学会年会
    • Place of Presentation
      名古屋大学
    • Year and Date
      2015-11-24
    • Related Report
      2015 Annual Research Report
  • [Presentation] TEXTORプラズマ曝露させたTFGRタングステンの溶融・凝固層の解析2014

    • Author(s)
      大宅諒, 伊庭野健造, H.T. Lee, 上田良夫, 栗下裕明, J.W. Coenen, A. Kreter
    • Organizer
      PLASMA2014
    • Place of Presentation
      朱鷺メッセ(新潟県)
    • Year and Date
      2014-11-20
    • Related Report
      2014 Research-status Report
  • [Presentation] タングステンの表面損傷2014

    • Author(s)
      上田良夫
    • Organizer
      PLASMA2014
    • Place of Presentation
      朱鷺メッセ(新潟県)
    • Year and Date
      2014-11-19
    • Related Report
      2014 Research-status Report
  • [Presentation] 日米協力PHENIX計画の概要と初年度の成果2014

    • Author(s)
      上田良夫,波多野雄治,横峯健彦,檜木達也,長谷川晃,大矢恭久,Pete Pappano, Lance Snead, Richard Nygren, 加藤雄大, Brad Merrill,Dean Buchenauer
    • Organizer
      第10回核融合エネルギー連合講演会
    • Place of Presentation
      つくば国際会議場(茨城県)
    • Year and Date
      2014-06-20
    • Related Report
      2014 Research-status Report
  • [Presentation] TEXTORプラズマ曝露で損耗・溶融させたTFGRタングステンの表面解析2014

    • Author(s)
      大宅 諒, Lee Heun Tae, 上田 良夫, 栗下 裕明, Arkadi Kreter, Jan Willem Coenen
    • Organizer
      第10回核融合エネルギー連合講演会
    • Place of Presentation
      つくば国際会議場(茨城県)
    • Year and Date
      2014-06-19
    • Related Report
      2014 Research-status Report

URL: 

Published: 2014-04-04   Modified: 2017-05-10  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi