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Observation System of Frictional Damage for Sliding Ceramics.

Research Project

Project/Area Number 63550114
Research Category

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

Allocation TypeSingle-year Grants
Research Field 機械要素
Research InstitutionGunma University, Faculty of Engineering.

Principal Investigator

HISAKADO Terumasa  Gunma University, Faculty of Engineering, Professor, 工学部, 教授 (20029060)

Project Period (FY) 1988 – 1989
Project Status Completed (Fiscal Year 1989)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1989: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1988: ¥1,900,000 (Direct Cost: ¥1,900,000)
KeywordsAE Amplitude Distribution / AE Mean R.M.S value / AE Ringdown Counts / Tribology / Ceramics Disk / Scratch Test / Normal Load / Frictional Damage / セラミックスディスク / ダイヤモンドスライダー / 引っかき試験垂直荷重 / 損傷形態
Research Abstract

Scratch tests of various ceramic disks (Al_2O_3, ZrO_2, Si_3N_4) were carried out with a diamond sliders (0.1R and 0.2R tip radius) at a sliding speed of 0.025 mm/s and under applied loads of 0.49-20.9 N and during their tests, an acoustic emissions (AE) were measured. The relationship between the acoustic emissions and the frictional deformation and damage of ceramic disks was obtained experimentally and it was apparent that the deformation and fracture properties of ceramics during sliding contacts were estimated from variations of an events, r.m.s. value, amplitude distribution and ringdown counts of AE.
1. In an Al_2O_3 disk the event counts (dN/dt) of AE for given applied load were obtained experimentally by (dN/dt)= C + b logx, where X; maximum amplitude, C,b; constants determined experimentally. The values of C increased with an increase of load but b was almost constant.
2. In the load ranges of W=2-3 N, W=4-5 N, and 10-11 N, the average r.m.s. values of AE increased abruptly and respectively. The reasons for abrupt changes were attributed to (1) the crack formation and plastic deformation at an edges of porosities on a ceramic disk, (2) the formation of deep groove due to plastic deformation and crack in a groove, (3) crack and chip formations taken their rise in lateral cracks on both side of a groove.
3. The ringdown counts and r.m.s. value of AE varied with the surface roughness and the density of porosity in the same kind of Al_2O_3.
4. The r.m.s. values of AE decreased with a number of repeated scratches but the coefficient of friction increased. The r.m.s. values also decreased with an increase of tip radius of a diamond slider because of decrease in contact pressure.

Report

(3 results)
  • 1989 Annual Research Report   Final Research Report Summary
  • 1988 Annual Research Report
  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 久門輝正: "セラミックスの摩擦変形機構(第1報)" トライボロジスト. 34. 510-516 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 久門輝正: "セラミックス同士の摩擦・摩耗機構の研究" トライボロジスト. 34. 807-814 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 久門輝正: "セラミックスの摩擦・摩耗機構" 日本機械学会論文集C編. 56. 789-796 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 久門輝正: "AEによるセラミックスの引っかき特性評価" トライボロジ-会議'90春東京講演会予稿集. (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] TERUMASA HISAKADO: "Deformation Mechanism of Ceramics Subjected to Frictional Force (1st Report)" Journal of Japanese Society of Tribologist, Vol.34, No.7, 510-516 (1989).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] TERUMASA HISAKADO: "Friction and Wear Mechanisms of Ceramics against Ceramics with Coatings" Journal of Japanese Society of Tribologist, Vol.34, No.11, 807-814 (1989).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] TERUMASA HISAKADO: "The Friction and Wear Mechanisms of Ceramics" Trans. JSME, Ser.C, Vol.56, No.523, 789-796 (1990).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] TERUMASA HISAKADO: "Estimate of Frictional Damage of Ceramics by Using Acoustic Emission" Preprint of Tribology Conference of '90 Spring in Tokyo, (1990).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 久門輝正: "セラミックスの摩擦変形機構(第1報)" トライボロジスト. 34. 510-516 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] 久門輝正: "セラミックス同士の摩擦・磨耗機構の研究" トライボロジスト. 34. 807-814 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] 久門輝正: "セラミックスの摩擦・磨耗機構" 日本機械学会論文集C編. 56. 789-796 (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] 久門輝正: "AEによるセラミックスの引っかき特性評価" トライボロジ-会議'90春東京講演会予稿集. (1990)

    • Related Report
      1989 Annual Research Report

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Published: 1988-04-01   Modified: 2016-04-21  

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