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TRIBOLOGICAL PROPERTIES OF MAGNET STRUCTURAL MATERIALS AT CRYOGENIC TEMPERATURES IN VACUUM

Research Project

Project/Area Number 04650123
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 機械要素
Research InstitutionIWATE UNIVERSITY

Principal Investigator

IWABUCHI Akira  IWATE UNIVERSITY, FACULTY OF ENGINEERING, PROFESSOR, 工学部, 教授 (00005555)

Co-Investigator(Kenkyū-buntansha) SHIMIZU Tomoharu  IWATEE UNIVERSITY, FACULTY OF ENGINEERING, RESEARCH ASSOCIATE, 工学部, 助手 (10240649)
Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1993: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1992: ¥1,300,000 (Direct Cost: ¥1,300,000)
KeywordsCRYOGENIC TEMPERATURE / SUPERCONDUCTING MAGNET / FRICTIONAL HEATING / TRIBOLOGY / QUENCH / TEMPERATURE RISE / MAGNET STRUCTURAL MATERIALS / CRYOGENIC VACUUM / トライボロジー / 摩擦 / 真空 / 構造材料
Research Abstract

In this project tribological properties of magnet structual materials were investigated at cryogenic temperatures in vacuum, because frictional heating in a magnet caused the quench of it, and frictional resistance determined the deflection of the structural components in vacuum.
1. Frictional properties
In the friction test at cryogenic temperatures in vacuum, the temperature dependence of friction was examined from 4 K to 150 K for seven combinations of JN1-JN1, JN2-JN2, SUS316L-SUS316L, JN1-Cu, JN2-Cu, Cu-Cu and JN2-CuNi. There were three types of the frictional properties : (1) independent on temperature, where the friction was high at about 4.0 for Cu-Cu, JN2-CuNi, and SUSU316L-SUS316L, (2) gradual increase with temperature for JN1-JN1 and JN2-JN2, and (3) higher friction from 40 to 90 K for JN1-Cu and JN2-Cu. The composition of residual gases in a vacuum chamber was examined. H_2 gas at 20 K, N_2 gas at 50 K and CO_2 at 100 K appeared. The change in hardness of metals would determine the frictional properties.
2. Temperature rise in vacuum
Temperature rise due to frictional heating was tried to measure. However, the temperature of the moving specimen was not cooled enough, which resulted in the unsuccess of the measurement. The cooling was only the thermal conduction through the contact area between specimens. The new method to cool the moving specimen should be developed hereafter.
3. Assessment of coated film in Nb_3Sn superconduction wire
Usually Cr was plated on Nb_3Sn superconductiong wire to reduce AC loss. However, the coated film was separated by the small sliding, and Cu substrate appeared. The friction test and contacting resistance measurement were carried out in liquid helium for wires with different coating metals. Cr coated film was broken in the first 200 cycles, which was detected by the increase in coefficient of friction and the decrease in contacting resistance. Tungusten amorphous film with certain heat treatment showed the good performance.

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (27 results)

All Other

All Publications (27 results)

  • [Publications] 岩渕 明: "核融合超伝導マグネットにおけるトライボロジーの課題" 日本機械学会第70期全国大会資料集. 920-78F. 272-276 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.IWABUCHI: "Frictional properties of Magnet structural materials at agogenic Temperature in vacuum" Proc.6th Int.Cong.on Tribology,Budapest. 3. 376-381 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 岩渕 明: "液体ヘリウム中におけるCrメッキ(NbTi)_3Sn超伝導線材のトライボロジー特性" 低温工学. 28. 626-631 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.IWABUCHI: "Frictional Properties of Structural Steel JN2 at Cryogenic Temperatures in a Vacuum" Cryogenics. 33. 1110-1115 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 岩渕 明: "極低温のトライボロジー" 岩手大学学術シンポ「新しいトライボロジーと表面科学の接点」予稿集. 33-39 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 岩渕 明: "極低温真空中におけるマグネット構造材のトライボロジー特性" 日本機械学会71期全国大会講演論文集. 930-63E. 79-81 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.IWABUCHI: "Tribological problems in the superconducting magnet for a nuclear fusion reactor" JSME Anual Meeting Nagano. No.920-78F. 272-276 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.IWABUCHI, S.IIDA, Y.YOSHINO, H.ARAI, T.SHIMIZU and et al.: "Frictional properties of magnet structural materials at cryogenic temperature in vacuum" Proc.6th Int.Cong. on Tribology, Budapest. Vol.3. 376-381 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.IWABUCHI, H.ARAI, T.SHIMIZU, K.NOTO, T.HAMASHIMA and M.ONO: "Tribological properties of Cr plated (NbTi)_3Sn superconducting wire inliquid helium" Croyogenic Engineering Japan. 28-11. 626-631 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.IWABUCHI, S.IIDA, Y.YOSHINO, T.SHIMIZU, M.SUGIMOTO et al.: "Frictional properties of structural ateel JN2 at cryogenic temperatures in a vacuum" Cryogenics. 33-12. 1110-1115 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.IWABUCHI: "Tribology at cryogenic temperature" Symposium on Tribology Iwate University. 33-39 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.IWABUCHI, Y.YOSHINO, S.IIDA, Y.SHIMIZU, M.SUGIMOTO, K.YOSHIDA: "Tribological properties of magnet structural materials at cryogenic temperatures in vacuum" JSME Transaction, C. (to be submitted).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.IWABUCHI, H.ARAI, Y.YOSHINO, T.SHIMIZU, M.SUGIMOTO, et al.: "Fritional properties of ceramics, MoS2 coated films and polyethylene fiber reinforced plastics at 4.2 K in liquid helium" Cryogenis. (to be submitted).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.IWABUCHI, S.IIDA, T.SHIMIZU, M.SUGIMOTO and K.YOSHIDA: "Tribology at cryogenic temperatures in vacuum" JST Tribology Meeting, Spring, '92, Tokyo. 123-126 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] S.IIDA, A.IWABUCHI, T.SHIMIZU, M.SUGIMOTO and K.YOSHIDA: "Frictional properties of magnet structural materials at cryogenic temperature in vacuum" 48th Meeting on Cryogenics and Superconductivity. 84 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.ARAI, A.IWABUCHI, T.SHIMIZU, T.HAMAJIMA AND M.ONO: "Frictional property of Cr-coated superconducting wire in liquid helium" 48th Meeting on Cryogenics and Superconductivity. 241 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.IWABUCHI, H.ARAI, T.SHIMIZU, K.YOSHIDA and M.SUGIMOTO: "Frictional properties in liquid helium" JST Tribology Meeting, Spring, '93, Tokyo. 469-470 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] .IWABUCHI, H.ARAI, T.SHIMIZU, T.KASHIMA and H.INUI: "Frictional property of high strength polyethylene fiber reinforced composite at cryogenic temperature" 49th Meeting on Cryogenics and Superconductivity. 294 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.IWABUCHI, Y.YOSHINO, S.IIDA, Y.SHIMIZU, M.SUGIMOTO, K.YOSHIDA: "Tribological properties of magnet structural materials at cryogenic temperatures in vacuum" JSME Anual Meeting, Hiroshima. No.93-63F. 79-81 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.IWABUCHI, H.ARAI, T.SHIMIZU, T.HAMAJIMA and M.ONO: "Electrical contact resistance and frictional properties of Cr coated superconducting wire" 50th Meeting on Cryogenics and Superconductivity. 282 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.IWABUCHI: "Frictional Properties of Magnet Structural Materials at Cryogenic Tempernture in Vacuum" Proc.6th Int.Congress on Tribology,Budapest. 3. 376-381 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 岩渕 明: "液体ヘリウム中におけるCrメッキ(NbTi)_3Sn超電導線材のトライボロジー特性" 低温工学. 28. 626-631 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] A.IWABUCHI: "Frictional Properties of Structural Stal JN2 at Cryogenic Temperntures in a Vacuum" Cryogenics. 33. 1110-1115 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 岩渕 明: "極低温のトライボロジー" 岩手大学学術シンポ「新しいトライボロジーと表面科学の接点」予稿集. 33-39 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 岩渕 明: "超高強力ポリエチレン繊維よりなる複合材料の極低温での摩擦特性" 第49回低温工学・超電導学会(1993春季)講演概要集. 295 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 岩渕 明: "極低温真空中におけるマグネット構造材のトライボロジー特性" 日本機械学会71期全国大会講演論文集. 930-63E. 77-81 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] A.IWABUCHI: "Frictional Properties of magnet structural materials at cryogenic temperature in vacuum" Proc.of 6th Int.Congress on Tribology. (1993)

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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