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Flash-sintering: its atomistic process and mechanism

Research Project

Project/Area Number 17H03394
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Inorganic materials/Physical properties
Research InstitutionThe University of Tokyo (2018-2021)
National Institute for Materials Science (2017)

Principal Investigator

Yoshida Hidehiro  東京大学, 大学院工学系研究科(工学部), 教授 (80313021)

Project Period (FY) 2017-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2021: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2019: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2018: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2017: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Keywords電場支援焼結技術 / フラッシュ焼結 / セラミック / 粒界 / 物質輸送 / ドーピング / 電界 / 焼結
Outline of Final Research Achievements

In this study, we have attempted to extract the atomistic processes and elucidate the mechanisms of high-speed and low-temperature sintering through the original approach based on advanced nano-structural analysis, with a view to technological development of flash sintering. As a result, we succeeded in analyzing and capturing the unique point defect structures and atomic diffusion enhancement introduced under a strong electric field, and clarified the atomistic processes and mechanisms of the high-speed and low-temperature sintering. Based on this fundamental knowledge, we also obtained technical guidelines for increasing the density of low-sinterability oxide ceramics (with translucency) and for achieving high-speed and low-temperature sintering. These academic findings will show the way for the ceramics industry to respond to social demands such as SDG's and carbon neutrality.

Academic Significance and Societal Importance of the Research Achievements

フラッシュ焼結は研究開始当初から、セラミックスの新たな高速・低温焼結技術として世界的に注目されていた。本研究において見いだされたアクセプター・ドナー微量添加、および電場・電流波形制御による焼結性向上は、極めて重要な基礎的知見である。本研究ではそれら効果の機構についても解明しており、当該分野の学術的進展をもたらした。とりわけ、波形効果に関しては従来の研究においても必ずしも系統的な調査はなされておらず、本研究で見いだされた焼結挙動の周波数依存性およびその説明は世界的にも当該分野の先駆けとなった。さらに、本研究で得られた知見はカーボンニュートラル社会の実現に向けた技術基盤をもたらすものである。

Report

(6 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (42 results)

All 2022 2021 2020 2019 2018 Other

All Journal Article (10 results) (of which Peer Reviewed: 10 results,  Open Access: 1 results) Presentation (29 results) (of which Int'l Joint Research: 8 results,  Invited: 18 results) Remarks (3 results)

  • [Journal Article] Densification of Y2O3 by flash sintering under an AC electric field2022

    • Author(s)
      Nambu Kohta、Morita Koji、Soga Kohei、Yamamoto Takahisa、Masuda Hiroshi、Yoshida Hidehiro
    • Journal Title

      Journal of the European Ceramic Society

      Volume: 42 Issue: 2 Pages: 567-575

    • DOI

      10.1016/j.jeurceramsoc.2021.10.029

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Anelasticity induced by AC flash processing of cubic zirconia2022

    • Author(s)
      Masuda Hiroshi、Morita Koji、Tokunaga Tomoharu、Yamamoto Takahisa、Yoshida Hidehiro
    • Journal Title

      Acta Materialia

      Volume: 227 Pages: 117704-117704

    • DOI

      10.1016/j.actamat.2022.117704

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Electric current dependence of plastic flow behavior with large tensile elongation in tetragonal zirconia polycrystal under a DC field2021

    • Author(s)
      Sasaki Yamato、Morita Koji、Yamamoto Takahisa、Soga Kohei、Masuda Hiroshi、Yoshida Hidehiro
    • Journal Title

      Scripta Materialia

      Volume: 194 Pages: 113659-113659

    • DOI

      10.1016/j.scriptamat.2020.113659

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fundamentals of Sintering: ―Theory and Practice― Ⅳ. Development of Electric Current-assisted Sintering Techniques2020

    • Author(s)
      吉田英弘
    • Journal Title

      Materia Japan

      Volume: 59 Issue: 1 Pages: 37-43

    • DOI

      10.2320/materia.59.37

    • NAID

      130007778713

    • ISSN
      1340-2625, 1884-5843
    • Year and Date
      2020-01-01
    • Related Report
      2020 Annual Research Report 2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Doping effect on the flash sintering of Y2O3: Promotion of densification and optical translucency2020

    • Author(s)
      Yoshida Hidehiro、Hayasaka Hitoshi、Soga Kohei、Morita Koji、Kim Byung-Nam、Yamamoto Takahisa
    • Journal Title

      Journal of the European Ceramic Society

      Volume: 40 Issue: 15 Pages: 6053-6060

    • DOI

      10.1016/j.jeurceramsoc.2020.06.041

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Blue photoluminescence at room temperature from Y2O3-doped ZrO2 polycrystals sintered by flash sintering2020

    • Author(s)
      Yamashita Yudai、Itoh Asa、Tokunaga Tomoharu、Yoshida Hidehiro、Yamamoto Takahisa
    • Journal Title

      Applied Physics Express

      Volume: 13 Issue: 3 Pages: 035506-035506

    • DOI

      10.35848/1882-0786/ab7710

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Theory and Practice ─Ⅲ. Densification Behavior of Multi-particle Systems2019

    • Author(s)
      吉田英弘
    • Journal Title

      Materia Japan

      Volume: 58 Issue: 12 Pages: 782-788

    • DOI

      10.2320/materia.58.782

    • NAID

      130007754027

    • ISSN
      1340-2625, 1884-5843
    • Year and Date
      2019-12-01
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fundamentals of Sintering: ─Theory and Practice ─ II. Densification Kinetics2019

    • Author(s)
      吉田英弘
    • Journal Title

      Materia Japan

      Volume: 58 Issue: 11 Pages: 677-683

    • DOI

      10.2320/materia.58.677

    • NAID

      130007740023

    • ISSN
      1340-2625, 1884-5843
    • Year and Date
      2019-11-01
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fundamentals of Sintering: ―Theory and Practice ―I. Various Sintering Methods2019

    • Author(s)
      吉田英弘
    • Journal Title

      Materia Japan

      Volume: 58 Issue: 10 Pages: 570-575

    • DOI

      10.2320/materia.58.570

    • NAID

      130007721909

    • ISSN
      1340-2625, 1884-5843
    • Year and Date
      2019-10-01
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Intergranular amorphous films formed by DC electric field in pure zirconia2018

    • Author(s)
      Morisaki Nobuhiro、Yoshida Hidehiro、Kobayashi Tetsuro、Tokunaga Tomoharu、Yamamoto Takahisa
    • Journal Title

      Journal of the American Ceramic Society

      Volume: 未定 Issue: 8 Pages: 1-6

    • DOI

      10.1111/jace.15485

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] フラッシュ焼結が及ぼすY2O3の結晶構造への影響2021

    • Author(s)
      中元綾乃, 南部洸太, 増田紘士, 吉田英弘
    • Organizer
      粉体粉末冶金協会2021年度春季大会(第127回講演大会)
    • Related Report
      2021 Annual Research Report
  • [Presentation] Electric Field-assisted Plastic Flow in Structural Oxide Ceramics2021

    • Author(s)
      H. Yoshida, Y. Sasaki, H. Masuda, K. Morita, T. Yamamoto
    • Organizer
      Thermec'2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 立方晶ジルコニアへの通電処理による非弾性変形の発現2021

    • Author(s)
      増田紘士, 森田孝治, 吉田英弘
    • Organizer
      日本金属学会 2021年秋期(第169回)講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 強電場下におけるジルコニアのフォノン分散に関する第一原理計算2021

    • Author(s)
      玉生大貴, 増田紘士, 吉田英弘
    • Organizer
      日本セラミックス協会 第34回秋季シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] フラッシュ焼結したY2O3における結晶構造の解析2021

    • Author(s)
      中元綾乃, 南部洸太, 増田紘士, 吉田英弘
    • Organizer
      日本金属学会 2021年秋期(第169回)講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 酸化物の焼結緻密化と粒界現象2021

    • Author(s)
      吉田英弘
    • Organizer
      プロトニックセラミックス産学共同講座WEB討論会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] フラッシュ焼結の現状と今後の展望―セラミックス通電プロセスの可能性―2021

    • Author(s)
      吉田英弘
    • Organizer
      第6回次世代ジルコニアセミナー
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 強電場下における正方晶 ZrO2のフォノン物性2021

    • Author(s)
      玉生大貴, 増田紘士, 吉田英弘
    • Organizer
      粉体粉末冶金協会 2021年秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 高密度化のためのACフラッシュ焼結プロセスの制御2021

    • Author(s)
      南部洸太, 森田孝治, 山本剛久, 増田紘士, 吉田英弘
    • Organizer
      日本学術振興会第124委員会 第166回会議,“高信頼性セラミックス製造プロセスのための革新技術"
    • Related Report
      2021 Annual Research Report
  • [Presentation] フラッシュ現象を利用したTZPセラミックスの低温・高速速塑性流動2021

    • Author(s)
      吉田英弘
    • Organizer
      第167回超塑性研究会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 強電界下におけるセラミックスの高温物質輸送現象―新たなセラミックスプロセスの開拓―2020

    • Author(s)
      吉田英弘
    • Organizer
      粉体粉末冶金協会秋季大会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 強電界下でのセラミックスの物質輸送現象2020

    • Author(s)
      吉田英弘
    • Organizer
      日本金属学会2020年秋期大会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Electroplasticity and shaping2020

    • Author(s)
      H. Yoshida
    • Organizer
      DFG Summer School on Electric and Magnetic Field-assisted Processing of Inorganic Materials
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Superplastic forming of oxide ceramics enhanced by strong electric field2020

    • Author(s)
      H. Yoshida
    • Organizer
      Materials Science and Engineering (MSE) 2021
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Superplastic forming of oxide ceramics enhanced by strong electric field2019

    • Author(s)
      H. Yoshida, Y. Sasaki, T. Yamamoto
    • Organizer
      The 13th Pacific Rim Conference of Ceramics Societies
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Electric field-activated superplastic deformation in tetragonal zirconia polycrystals2019

    • Author(s)
      H. Yoshida, Y. Sasaki, T. Yamamoto
    • Organizer
      Materials Research Meeting 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 通電支援焼結における電場/電流効果とは2019

    • Author(s)
      吉田英弘, 山本剛久
    • Organizer
      第24回通電焼結研究会 通電焼結プロセスによる材料研究の新展開
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] フラッシュ焼結により製造された無添加およびSi4+添加イットリア多結晶体の蛍光特性2019

    • Author(s)
      南部洸太, 早坂仁志, 森田孝治, 曽我公平, 山本剛久, 吉田英弘
    • Organizer
      粉体粉末冶金協会2019年度秋季大会(第124回講演大会)
    • Related Report
      2019 Annual Research Report
  • [Presentation] TZPの低温超塑性変形応力における電場/電流効果2019

    • Author(s)
      佐々木和, 吉田英弘, 曽我公平
    • Organizer
      日本金属学会2019年秋期(第165回)講演大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] フラッシュ焼結を利用した多結晶Y2O3蛍光体の作製2019

    • Author(s)
      吉田英弘, 南部洸太, 佐々木和, 山本剛久
    • Organizer
      日本金属学会2019年秋期(第165回)講演大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] フラッシュ焼結とその周辺技術2019

    • Author(s)
      吉田英弘, 山本剛久
    • Organizer
      2019年度第1回バルクセラミックスの信頼性に関するワークショップ
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] フラッシュ焼結の現状と展望2019

    • Author(s)
      吉田英弘
    • Organizer
      日本学術振興会第124委員会第157回会議
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] フラッシュ焼結―原理と周辺技術―2019

    • Author(s)
      吉田英弘
    • Organizer
      粉末冶金技術研究会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 構造セラミックスの新展開―電場支援プロセスを利用した新たな微構造と機能創製2018

    • Author(s)
      吉田英弘
    • Organizer
      日本学術振興会第176委員会第37回研究会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 電場支援による構造セラミックス材料の創出と新規力学特性2018

    • Author(s)
      吉田英弘
    • Organizer
      第18回 五セラミックス機関(東工大-名工大-JFCC-AIST-NIMS)合同講演会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Field-assisted and flash sintering and processing of oxide ceramics2018

    • Author(s)
      H. Yoshida, T. Yamamoto
    • Organizer
      2018 MRS Fall Meeting & Exhibit.
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] フラッシュ焼結によるセラミックスの緻密化と関連技術2018

    • Author(s)
      吉田英弘, 山本剛久
    • Organizer
      粉体粉末冶金協会平成30年度春季大会(第121回講演大会)
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Flash-sintering and related phenomena in oxide ceramics2018

    • Author(s)
      H. Yoshida, K. Morita, B.-N. Kim, T. Yamamoto
    • Organizer
      the 12th International Symposium on Advanced Processing and Manufacturing Technologies for Structural and Multifunctional Materials and Systems (APMT12)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Electric-current-controlled synthesis of BaTiO3 under a high DC electric field at elevated temperatures2018

    • Author(s)
      H. Yoshida, Y. Nakagawa, A. Uehashi, T. Yamamoto
    • Organizer
      2018 Conference on Electronic and Advanced Materials (EAM 2018)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Remarks] マテリアル工学専攻 吉田(英)研究室(構造セラミック材料学)

    • URL

      http://www.ceramic.t.u-tokyo.ac.jp/

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
  • [Remarks] 研究者総覧

    • URL

      https://samurai.nims.go.jp/profiles/yoshida_hidehiro

    • Related Report
      2017 Annual Research Report
  • [Remarks] NIMS Researchers Directry service

    • URL

      https://samurai.nims.go.jp/profiles/yoshida_hidehiro?locale=en

    • Related Report
      2017 Annual Research Report

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Published: 2017-04-28   Modified: 2023-01-30  

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