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Non-Brittle Behavior of Inorganic Glasses

Research Project

Project/Area Number 09450244
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 Shiga Prefecture (1998-1999)
Kyoto University (1997)

Principal Investigator

SOGA Naohiro  Univ. Shiga Pref., School of Engineering, Professor, 工学部, 教授 (80026179)

Co-Investigator(Kenkyū-buntansha) YOSHIDA Satoshi  Univ.Shiga Pref., School of Engineering, Research Assistant, 工学部, 助手 (20275168)
MATSUOKA Jun  Univ.Shiga Pref., School of Engineering, Assistant Professor, 工学部, 講師 (20238984)
田中 勝久  京都大学, 工学研究科, 助手 (80188292)
平尾 一之  京都大学, 工学研究科, 助教授 (90127126)
Project Period (FY) 1997 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥12,700,000 (Direct Cost: ¥12,700,000)
Fiscal Year 1999: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1998: ¥4,200,000 (Direct Cost: ¥4,200,000)
Fiscal Year 1997: ¥6,800,000 (Direct Cost: ¥6,800,000)
KeywordsGlass / Fracture / Slow Crack Growth / Oxycarbide Glass / Lithium Silieate / Activation Energy / Luminescence / Wallner Lines / 低速クラック伸長 / ケイ酸塩ガラス / 引掻き硬さ / 結晶化ガラス / オキシカーバイドガラス / インデンテーション / 高密度化 / 塑性変形 / シリカガラス / ホウ酸塩ガラス / ソーダ石灰ガラス / 塑性流動 / 熱緩和
Research Abstract

Existence of the non-brittle behavior of inorganic glass has not been studied widely though it will be common from the analysis of indentation-fracture and the comparison between fracture and static surface energies. So, as the commonly accepted method to evaluate the order of non-brittleness, many approaches are examined in this study. Results are as follows :
In the existence of water molecules, slow crack growth behavior of borate glasses which shows large inelastic deformation at fracture is found to be different from that of silicate glasses, I.e., stress-independent crack propagation is observed in borate glasses at a region with very low stress intensity factor.
Slow crack growth behavior at inert condition, I.e., intrinsic slow crack growth, with various temperatures is measured for lithium disilicate and soda lime silicate glasses using a newly developed DCDC measurement of slow crack growth with stress-wave fractography. The stress intensity factor with the same crack growth rate of the lithium disilicate glass is found to be larger than that of soda lime silicate. The activation energy of slow crack growth for the former glass is much smaller than that of latter one. In the former glass, non-Arrhenius temperature dependence is observer above 150℃.
Fracture-induced luminescence in the visible region is observed in rare-earth doped hexacelsian crystals. The origin of this phenomenon should be fractoluminescence of hexacelsian in the UV region that would excite the rare-earth ions.

Report

(4 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • 1997 Annual Research Report
  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] T. Ishihara: "Fracto-Luminescence of Rare Earth Element-Doped Hexacelsian"Japanese Journal of Applied Physics. 36. L781-L783 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] S. Yoshida: "The Growth Behavior of Indetation Induced Crack for Sodium Borate Glosses"Proceedings of the 18th International Congress on Glass. E5 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] S. Yoshida: "Evaluaion of Crack Growth in Glass by Using Stress-Wave Fractography"Journal of the American Ceramic Society. 82. 1621-1623 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K. Kamiya: "Preparation of Silicon Oxycarbide Glass Fivers by Sol-Gel Method"Journal of Sol-Gel Science and Technology. 14. 95-102 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] T.Ishihara, K.Tanaka, K.Hirao and N.Soga: "Fracto-Luminescence of Rare Earth Element-Doped Hexacelsian (BaAlィイD22ィエD2SiィイD22ィエD2OィイD28ィエD2"Jpn.J.Appl.Phys. 36. L781-L783 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] S.Yoshida, J.Matsuoka and N.Soga: "The Growth Behavior of Indentation-Induced Grack for Sodium Borate Glasses"Proc.18th Internat.Cong.Glass. E5 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] S.Yoshida, J.Matsuoka and N.Soga: "Evaluation of Crack Growth in Glass by Using Stress-Wave Fractography"J.Am.Ceram. Soc.. 82. 1621-1623 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K.Kamiya, A.Katayama, H.Suzuki, K.Nishida, T.Hashimoto, J.Matsuoka and H.Nasu: "Preparation of Silicon Oxycarbide Glass Fibers by Sol-Gel Method"J.Sol-Gel. Sci.Fech.. 14. 95-102 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] S.Yoshida,J.Matsuoka and N.Soga: "Evaluation of Crack Growth in Glass by Using Stress-Wave Fractography"Journal of American Ceramic Society. 82・6. 1621-1623 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] K.Kamiya,A.Katayama,H.Suzuki,K.Nishida,T.Hashimoto,J.Matsuoka and H.Nasu: "Preparation of Silicon Oxycarbide Glass Fivers by Sol-Gel Method-Effect of Starting Sol Composition on Tensile Strength of Fibers"Journal of Sol-Gel Science and Technology. 14・1. 95-102 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] S.Yoshida,J.Matsuoka,and N.Soga: "The Growth Behavior of Indentation Induced Crack for Sodium Borate Glasses" Proc.18th Internat.Cong,Glass(CD-ROM Version). PO1-276 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] T.Ishihara: "Fracto-Luminescence of Rare Earch Element-Doped Hexacelsian (BaAl_2Si_2O_8)" Jpn.J.Appl.Phys.36. L781-L783 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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