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Study on Viscosity Measurement by using the Rotational Viscometer with Concentric Cylinder Spindle Geometry for Mass Production of Lead Free Solder

Research Project

Project/Area Number 16K06812
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Metal making/Resorce production engineering
Research InstitutionIbaraki University

Principal Investigator

Nishi Tsuyoshi  茨城大学, 理工学研究科(工学野), 准教授 (70518331)

Co-Investigator(Kenkyū-buntansha) 太田 弘道  茨城大学, 理工学研究科(工学野), 教授 (70168946)
Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords鉛フリーはんだ / 粘度 / 共軸二重円筒回転粘度計 / 還元雰囲気 / Sn-Ag-Cu合金 / アレニウスプロット / 活性化エネルギー / 粘度評価式 / 酸化皮膜 / ダイラタント流体 / 濡れ性シミュレーション / 共軸二重円筒形回転粘度計 / スズ・銀・銅合金 / 粘度測定
Outline of Final Research Achievements

The viscosities of four Sn-Ag-Cu alloys most practically used as lead-free solders were systematically measured by using a rotational viscometer with concentric cylinder spindle geometry. By installing a viscometer inside a glove box in reducing atmosphere, it was succeeded to develop the environmental system of the easily viscosity measurement of lead-free solder. In these results, the negative temperature dependence with respect to temperature was observed. In addition, a good linear relationship was obtained by the Arrhenius plot. Moreover, the fitting equation could be constracted between temperature and viscosity. The activation energy of viscous flow obtained by the Arrhenius plot and viscosity values was not observed a large difference due to the difference of the composition of the samples. Therefore, it was found that there was no difference of the structure in the molten state.

Academic Significance and Societal Importance of the Research Achievements

溶融金属を取り扱う加工プロセスにおいて、流動性の基礎物性である粘度を知ることは流動特性を検討する上で必要不可欠である。しかし、鉛フリーはんだの粘度データに関しては、粘度測定で用いているるつぼ回転振動法が容易でないことから、信頼性のある実験データは殆ど存在しない状況であった。また、鉛フリーはんだは表面に酸化被膜を形成すること、低粘度であるということからるつぼ回転振動法に代わる粘度測定法を見出せない現状であった。以上の問題点を解決するため、共軸二重円筒回転粘度計を還元雰囲気にしたグローブボックス内に設置することにより、簡便に粘度測定が行える環境システムを構築した。

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (10 results)

All 2019 2017 2016

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results,  Acknowledgement Compliant: 1 results) Presentation (6 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results) Book (1 results)

  • [Journal Article] Current Status and Future Plan of the Viscosity Measurement for the Lead-Free Solder2017

    • Author(s)
      橋本 康孝、西 剛史、太田 弘道
    • Journal Title

      Journal of the Japan Institute of Metals and Materials

      Volume: 81 Issue: 5 Pages: 221-225

    • DOI

      10.2320/jinstmet.J2016066

    • NAID

      130005611858

    • ISSN
      0021-4876, 1880-6880, 2433-7501
    • Related Report
      2017 Research-status Report 2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] 鉛フリーはんだの粘性率測定の現状と課題2017

    • Author(s)
      橋本康孝,西 剛史,太田弘道
    • Journal Title

      第18回電子デバイス実装研究委員会資料

      Volume: 18 Pages: 47-57

    • Related Report
      2017 Research-status Report
  • [Journal Article] 共軸二重円筒回転粘度計を用いたSn-Ag-Cuはんだの粘度測定2017

    • Author(s)
      橋本康孝,西 剛史,太田弘道
    • Journal Title

      第38回日本熱物性シンポジウム講演論文集

      Volume: 38

    • Related Report
      2017 Research-status Report
  • [Presentation] 共軸二重円筒回転粘度計を用いた溶融はんだ合金の粘度測定の精度検証2019

    • Author(s)
      小久保亮汰、西 剛史、太田弘道
    • 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] 鉛フリーはんだの粘性率測定の現状と課題2017

    • Author(s)
      橋本康孝,西 剛史,太田弘道
    • Organizer
      第18回電子デバイス実装研究委員会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 溶融Sn-Ag-Cuはんだの粘性率-温度・Ag添加量依存性の検討2017

    • Author(s)
      橋本康孝,西 剛史,太田弘道
    • Organizer
      日本金属学会2017年秋期(第161回)講演大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 共軸二重円筒回転粘度計を用いたSn-Ag-Cuはんだの粘度測定2017

    • Author(s)
      橋本康孝,西 剛史,太田弘道
    • Organizer
      第38回日本熱物性シンポジウム
    • Related Report
      2017 Research-status Report
  • [Presentation] Viscosity Measurement of Liquid Sn-Ag-Cu Alloys2016

    • Author(s)
      Yasutaka Hashimoto, Hiromichi Ohta, Tsuyosi Nishi
    • Organizer
      The 11th Asian Thermophysical Properties Conference
    • Place of Presentation
      YOKOHAMA
    • Year and Date
      2016-10-02
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 溶融Sn-Ag-Cu合金の粘度測定システムの開発2016

    • Author(s)
      橋本 康孝、西 剛史、太田 弘道
    • Organizer
      日本金属学会2016年秋期(第159回)講演大会
    • Place of Presentation
      大阪
    • Year and Date
      2016-09-21
    • Related Report
      2016 Research-status Report
  • [Book] 日本伝熱学会主催講習会テキスト 計測技術~温度・熱流・熱伝導率測定の基礎と応用~ (6)融体の熱物性(熱伝導率、粘性)2019

    • Author(s)
      西 剛史
    • Total Pages
      20
    • Publisher
      日本伝熱学会
    • Related Report
      2019 Annual Research Report

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Published: 2016-04-21   Modified: 2021-02-19  

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