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Experimental verification of velocity dependence of dynamic contact angle in high-speed shape-controlled single-crystallization technology of refractory alloys

Research Project

Project/Area Number 22K20473
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0401:Materials engineering, chemical engineering, and related fields
Research InstitutionTohoku University

Principal Investigator

Murakami Rikito  東北大学, 金属材料研究所, 助教 (30963665)

Project Period (FY) 2022-08-31 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsマイクロ引下げ法 / 接触角 / Growth angle / メニスカス / 濡れ性 / 形状制御 / 合金線材 / 単結晶育成 / マイクロ引き下げ法 / 形状制御凝固
Outline of Research at the Start

濡れ性の低い系におけるマイクロ引き下げ法(Dewetting μ-PD法)は、近年開発された表面張力を利用した形状制御単結晶育成法であり、従来は機械加工が困難とされた難加工性高融点材料をシングルプロセスで高速に線材化することが可能である。本手法ではしばしば、結晶径が正の引下げ速度依存性を示すことによって、数百mm/minの引下げ速度においても形状制御性を維持することが可能となる。従来の濡れ性の比較的良好な系におけるμ-PD法では見られないこの特徴に対し、本研究では、前進接触角の速度依存性の観点から検証を行い、新物質探索や新たな工業手法としての適用可能性を探る。

Outline of Final Research Achievements

The micro-pulling-down method in a low-wettability system (dewetting μ-PD method) is a recently developed high speed, shape controlling, surface tension based single crystal growth method that enables rapid wire production in a single process of difficult-to-machine materials previously thought to be impossible to machine.
Unlike conventional methods, this method exhibits features such as a positive dependence of crystal diameter on pulling rate, which was expected to be influenced by the rate dependence of the advancing contact angle. In this study, the influence of the advancing contact angle was confirmed by measuring the growth angle, and by comparing the deviation between the theoretical value and the value predicted from the crystal growth test, it was shown that the advancing contact angle and its velocity dependence varied depending on the system.

Academic Significance and Societal Importance of the Research Achievements

濡れ性の低い系におけるマイクロ引下げ法(Dewetting μ-PD法)によれば、IrやRuといった融点が2,000℃を超える合金の単結晶長尺線材をシングルプロセスで製造することができる。工業的な水準として、線径0.8 mmに対して±10 μm以下の形状制御性が求められてきたが、Dewetting μ-PD法では従来の結晶育成法における形状制御の指針が適用できないことが課題であった。本研究によって、Growth angleと前進接触角の速度依存性を考慮することにより、目的の線径を得るための結晶育成条件の最適化を行うことが可能となった。

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (25 results)

All 2024 2023 2022 Other

All Int'l Joint Research (1 results) Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (12 results) (of which Int'l Joint Research: 8 results) Patent(Industrial Property Rights) (10 results) (of which Overseas: 1 results)

  • [Int'l Joint Research] The University of Tennessee(米国)

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Effects of crystal growth rate and pressure on shape controllability in the dewetting micro-pulling-down method2024

    • Author(s)
      Murakami Rikito、Oikawa Katsunari、Kamada Kei、Itoi Shiika、Yoshikawa Akira
    • Journal Title

      Journal of Crystal Growth

      Volume: 629 Pages: 127565-127565

    • DOI

      10.1016/j.jcrysgro.2023.127565

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] High-toughness/resistivity ruthenium-based refractory alloy wires2023

    • Author(s)
      Murakami Rikito、Kamada Kei、Umetsu Kenichi、Yoshioka Takashi、Oikawa Katsunari、Kido Junji、Yoshikawa Akira
    • Journal Title

      International Journal of Refractory Metals and Hard Materials

      Volume: 114 Pages: 106235-106235

    • DOI

      10.1016/j.ijrmhm.2023.106235

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Ru-Mo-W合金結晶の作製と超臨界水および無機酸に対する耐食性評価2024

    • Author(s)
      村上力輝斗,山口大聡, 糸井椎香, 鎌田圭, 吉川彰
    • Organizer
      2024年第71回応用物理学会春季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Single crystal growth of Ru-Mo-W-Re alloy wire by the dewetting micro-pulling-down method2023

    • Author(s)
      Rikito Murakami, Shiika Itoi, Kotaro Yonemura, Kei Kamada, Akira Yoshikawa
    • Organizer
      The 32nd Development of Materials Science in Research and Education
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Experimental investigation of shape control criteria for wire fabrication of alloys by the dewetting micro-pulling-down method2023

    • Author(s)
      Rikito Murakami, Katsunari Oikawa, Kei Kamada, Akira Yoshikawa
    • Organizer
      20th edition of the International Conference on Crystal Growth and Epitaxy
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigation of shape control criteria for wire fabrication of alloys by the dewetting micro-pulling-down method2023

    • Author(s)
      Rikito Murakami, Katsunari Oikawa, Kei Kamada, Akira Yoshikawa
    • Organizer
      20th edition of the International Conference on Crystal Growth and Epitaxy
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Luminescence and scintillation properties of Tb,Ce co-doped (Gd,La)2Si2O7 for radiation imaging2023

    • Author(s)
      Rikito MURAKAMI, Shunsuke KUROSAWA, Masao YOSHINO, Takahiko HORIAI, Akihiro YAMAJI, Yasuhiro SHOJI, Kei Kamada, Yuui YOKOTA, Akira YOSHIKAWA
    • Organizer
      9th International Symposium on Optical Materials
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Crystal growth of long Ru-Mo-W alloy single crystal wires by the dewetting micro-pulling-down method equipped with a continuous feeding system2023

    • Author(s)
      Rikito Murakami, Shiika Itoi, Kotaro Yonemura, Kei Kamada, Akira Yoshikawa
    • Organizer
      The 11th Pacific Rim International Conference on Advanced Materials and Processing
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ru-Mo-W-Re合金結晶線材のDewetting マイクロ引き下げ法による育成および評価2023

    • Author(s)
      村上力輝斗,糸井椎香,米村虎太朗,鎌田圭, 吉川彰
    • Organizer
      2023年第84回応用物理学会秋季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Effect of impurity Zr contamination on properties of Ru-Mo-W alloys grown by the dewetting micro-pulling-down method2023

    • Author(s)
      Kotaro Yonemura, Rikito Murakami, Shiika Itoi, Kei Kamada, Takahiro Horiai, Takashi Hanada, Akihiro Yamaji, Masao Yoshino, Hiroki Sato, Yuji Ohashi, Shunsuke Kurosawa, Yui Yokota, Akira Yoshikawa
    • Organizer
      The 11th Pacific Rim International Conference on Advanced Materials and Processing
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Relationship between resistivity and composition of Ru-Mo-W system and single crystal wire grown by the dewetting micro-pulling-down method2023

    • Author(s)
      Kotaro Yonemura, Rikito Murakami, Shiika Itoi, Kei Kamada, Takahiro Horiai, Takashi Hanada, Akihiro Yamaji, Masao Yoshino, Hiroki Sato, Yuji Ohashi, Shunsuke Kurosawa, Yui Yokota, Akira Yoshikawa
    • Organizer
      The 32nd Development of Materials Science in Research and Education
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of Ruthenium-Based Alloy Wire for Highly Efficient OLED Vacuum Deposition2023

    • Author(s)
      Rikito Murakami, Kei Kamada, Kenichi Umetsu, Shiika Itoi, Hiroaki Yamaguchi, Takashi Yoshioka, Katsunari Oikawa, Junji Kido, Akira Yoshikawa
    • Organizer
      The Minerals, Metals & Materials Society 2023 Annual Meeting & Exhibition
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 濡れ性の低い系でのマイクロ引き下げ法における合金線材の形状制御凝固(1)2022

    • Author(s)
      村上 力輝斗,及川 勝成,鎌田 圭,吉川 彰
    • Organizer
      結晶成長学会
    • Related Report
      2022 Research-status Report
  • [Presentation] 濡れ性の低い系でのマイクロ引き下げ法における合金線材の形状制御凝固(2)2022

    • Author(s)
      村上 力輝斗,及川 勝成,鎌田 圭,吉川 彰
    • Organizer
      結晶成長学会
    • Related Report
      2022 Research-status Report
  • [Patent(Industrial Property Rights)] 製造装置及び結晶成長方法2023

    • Inventor(s)
      村上力輝斗、吉川彰、鎌田圭、山口大聡、糸井椎香、庄子育宏
    • Industrial Property Rights Holder
      村上力輝斗、吉川彰、鎌田圭、山口大聡、糸井椎香、庄子育宏
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2023-075899
    • Filing Date
      2023
    • Related Report
      2023 Annual Research Report
  • [Patent(Industrial Property Rights)] 処理装置および方法2023

    • Inventor(s)
      村上 力輝斗、吉川 彰、鎌田 圭、糸井椎香
    • Industrial Property Rights Holder
      村上 力輝斗、吉川 彰、鎌田 圭、糸井椎香
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2023-195964
    • Filing Date
      2023
    • Related Report
      2023 Annual Research Report
  • [Patent(Industrial Property Rights)] 金属部材および製品2023

    • Inventor(s)
      村上 力輝斗、吉川 彰、鎌田 圭、糸井 椎香、庄子 育宏
    • Industrial Property Rights Holder
      村上 力輝斗、吉川 彰、鎌田 圭、糸井 椎香、庄子 育宏
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2023-208246
    • Filing Date
      2023
    • Related Report
      2023 Annual Research Report
  • [Patent(Industrial Property Rights)] 金属部材および製品2023

    • Inventor(s)
      村上 力輝斗、吉川 彰、鎌田 圭、糸井 椎香、庄子 育宏
    • Industrial Property Rights Holder
      村上 力輝斗、吉川 彰、鎌田 圭、糸井 椎香、庄子 育宏
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2023-208247
    • Filing Date
      2023
    • Related Report
      2023 Annual Research Report
  • [Patent(Industrial Property Rights)] 金属部材および製品2023

    • Inventor(s)
      村上 力輝斗、吉川 彰、鎌田 圭、糸井 椎香、庄子 育宏
    • Industrial Property Rights Holder
      村上 力輝斗、吉川 彰、鎌田 圭、糸井 椎香、庄子 育宏
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2023-208249
    • Filing Date
      2023
    • Related Report
      2023 Annual Research Report
  • [Patent(Industrial Property Rights)] 金属部材および製品2023

    • Inventor(s)
      村上 力輝斗、吉川 彰、鎌田 圭、糸井 椎香、庄子 育宏
    • Industrial Property Rights Holder
      村上 力輝斗、吉川 彰、鎌田 圭、糸井 椎香、庄子 育宏
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2023-208251
    • Filing Date
      2023
    • Related Report
      2023 Annual Research Report
  • [Patent(Industrial Property Rights)] 金属部材および製品2023

    • Inventor(s)
      村上 力輝斗、吉川 彰、鎌田 圭、糸井 椎香、庄子 育宏
    • Industrial Property Rights Holder
      村上 力輝斗、吉川 彰、鎌田 圭、糸井 椎香、庄子 育宏
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2023-208252
    • Filing Date
      2023
    • Related Report
      2023 Annual Research Report
  • [Patent(Industrial Property Rights)] 組成物、及び、抵抗発熱体2023

    • Inventor(s)
      村上力輝斗、吉川彰、鎌田圭、山口大聡、糸井椎香、庄子育宏
    • Industrial Property Rights Holder
      村上力輝斗、吉川彰、鎌田圭、山口大聡、糸井椎香、庄子育宏
    • Industrial Property Rights Type
      特許
    • Filing Date
      2023
    • Related Report
      2023 Annual Research Report
    • Overseas
  • [Patent(Industrial Property Rights)] 化合物、被膜、容器材料および管材2022

    • Inventor(s)
      村上力輝斗、吉川彰、鎌田圭、山口大聡、糸井椎香、庄子育宏
    • Industrial Property Rights Holder
      村上力輝斗、吉川彰、鎌田圭、山口大聡、糸井椎香、庄子育宏
    • Industrial Property Rights Type
      特許
    • Filing Date
      2022
    • Related Report
      2022 Research-status Report
  • [Patent(Industrial Property Rights)] 超臨界流体または亜臨界流体用耐食部材2022

    • Inventor(s)
      村上力輝斗、吉川彰、鎌田圭、山口大聡、糸井椎香、庄子育宏
    • Industrial Property Rights Holder
      村上力輝斗、吉川彰、鎌田圭、山口大聡、糸井椎香、庄子育宏
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2022-198275
    • Filing Date
      2022
    • Related Report
      2022 Research-status Report

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Published: 2022-09-01   Modified: 2025-01-30  

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