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Development for Mesurment System on Impact Fracture Toughness of Ceramic Material at Elevated Temperature

Research Project

Project/Area Number 60850020
Research Category

Grant-in-Aid for Developmental Scientific Research

Allocation TypeSingle-year Grants
Research Field 材料力学
Research InstitutionTokyo Institute of Technology

Principal Investigator

SAKATA Masaru  Tokyo Institute of Technology, 工学部, 教授 (90016296)

Co-Investigator(Kenkyū-buntansha) KISHIMOTO Kikuo  Tokyo Institute of Technology, 工学部, 助手 (30111652)
MATSUO Youtarou  Tokyo Institute of Technology, 工学部, 助教授 (70016608)
AOKI Shigeru  Tokyo Institute of Technology, 工学部, 教授 (90016436)
Project Period (FY) 1985 – 1987
Project Status Completed (Fiscal Year 1987)
Budget Amount *help
¥14,100,000 (Direct Cost: ¥14,100,000)
Fiscal Year 1987: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1986: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1985: ¥12,500,000 (Direct Cost: ¥12,500,000)
KeywordsCetamics / Dynamic Stress Intensity Factor / Impact Test / Impact Fracture Toughness One-Poine-Bend Specimen / 簡便式 / 炭化珪素 / 窒化珪素 / 部分安定ジルコニア / 高温衝撃破壊靱性
Research Abstract

A new instrumentation system has been developed for measutement of the impact fracture toughness of ceramic materials at the elebvated temperature up to 1200゜C by impact test with free ends bend specimenone-point-bend specimen). The specimen is of Charpy type(6mm widht, 8mm height and 50mm length) and hanged in an infrared image furnace by a couple of thin ceramic threads cemented onto the end surface of the specimen. Thus the heat counduction that usually take place through support structure can be avoided or kept to a minimum. The impact force id proveded by a falling steel cylinder of 6mm diameter and 1500mm length with a pair of semiconductor strain guages cemented onto a cylindrical surface to measure the stress wave history and hence to determine the impact force. Since the thin threads are thought to be broken at the moment of impact, the specimen is supposed to fracture with both ends free from constraint.
A simple formula has been detived for determining the dynamic stress intensity factor from the measured impact force. A microcomputer is used for processing the experimental data. A series if impact tests has been performed with drop-height increased gradually and the impact fracture toughness was determined from the test data of the minimum drop-height that caused specimen fracture. The impact fracture toughness values of the ceramic specimens made of Silicon carbide(SiC), Silicon nitride(I_3n_4) or partially stabilized zirconia(ZrO_2) were measured and the usefulness of the present system has been demonstrated.

Report

(3 results)
  • 1987 Final Research Report Summary
  • 1986 Annual Research Report
  • 1985 Annual Research Report

Research Products

(15 results)

All Other

All Publications

  • [Publications] 坂田 勝,岸本喜久雄: 材料. 34. 1356-1362 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Y.Matsuo,T.Ogasawara,E.Yasuda and S.Kimura: Machining of Advanced Ceramic Materials and Conponents Eds.R.E.Barks,K.Subramanian and K.E.Ball,Acers. 235-248 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 坂田 勝,青木 繁,岸本喜久雄,藤野 陽輔,穐場 享: 日本材料強度学会講演講文集. 43-44 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 坂田 勝,青木 繁,岸本喜久雄,藤野 陽輔,穐場 享: 第4回破壊力学シンポジウム論文集. 180-184 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 坂田勝,青木繁,岸本喜久雄,藤野陽輔,穐場享: 日本機械学会 材料力学講演概要集. NO870-12. 86-87 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 藤野 陽輔,岸本喜久雄,青木 繁,坂田 勝: 日本機械学会論文集.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] M. Sakata and K. Kishimoto: "Impact Fracture and Impact Fracture Toughness" J Socity of Materials Scince Japan. 36. 247-279 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Y. Matsuo et al.: "Analytical and %experimental Study on the Bending Strength of SiC Specimen with Ground Surface" Machining of Advanced Ceramic Materials and Components (R.E. Bark er al. eds.) Acers. 235-248 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] M. Sakata er al.: "A Mesurment System on Impact Fracture Toughness of Ceramic Material at Elevated Temperature" Preprint for JSFM Meeting. 43-46 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] M. Sakata et al.: "Measurement of Dynamic Fracture Toughness of Ceramic Material at Erlevated Temperatures by Impact Test with Free Ends Bend Specimen" Proc. 4th Symposim on Fracture Mechanice (The Society of Material Science JAPAN). 180-184 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Y. Fujino et al.: "Simply Formula for Synamic Stress Intersity Factor of Impacted Free-Supported Bend Specimen" Tranasaction of JSM@e.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 藤野陽輔 ほか: 日本機械学会講演概要集. 860-10. 34-35 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 坂田勝 ほか: 材料.

    • Related Report
      1986 Annual Research Report
  • [Publications] 材料(日本材料学会). 34-386. (1985)

    • Related Report
      1985 Annual Research Report
  • [Publications] 材料(日本材料学会). 34-386. (1985)第3回破壊力学シンポジウム講演論文集.

    • Related Report
      1985 Annual Research Report

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Published: 1987-03-30   Modified: 2016-04-21  

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