Improvement of Contact Strength in Ceramics by Crack-Healing

• TAKAHASHI Keita

  Graduate School of Engineering, Yokohama National University

• NISHIO Yoshitada

  Graduate School of Engineering, Yokohama National University

• TAKAHASHI Koji

  横浜国立大学大学院工学研究院

• ANDO Kotoji

  横浜国立大学大学院工学研究院

Bibliographic Information

Other Title

• 自己き裂治癒能力の応用によるセラミックスの接触強度向上
• ジコ キレツ チユ ノウリョク ノ オウヨウ ニ ヨル セラミックス ノ セッショク キョウド コウジョウ

Abstract

Ceramics are expected as the structural materials but they are brittle materials. Therefore there is a possibility of rapid fracture when a contact stress intensively acts on the surface of materials. Therefore improvement of reliability is needed for ceramics used under a local contact stress. In response, the crack healing ability of ceramics is extremely effective. If the crack-healing ability of ceramics is used on structural components, great benefits can be anticipated, such as an increase in the reliability of structural ceramic members and a decrease in the inspection, machining and polishing costs of ceramic components. In the present study, the effects of the crack-healing on contact strength were investigated for Si_3N_4/SiC which was subjected to various machining process. The evaluation of contact strength was done by sphere indentation test that used acoustic emission (AE) together. As a result, the contact strength of Si_3N_4/SiC was improved by crack-healing with a combination of rapping even for the material that had machining cracks induced by a heavily machining process.

Journal

• TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A

  TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A 76 (770), 1379-1381, 2010

  The Japan Society of Mechanical Engineers

Keywords

• Ceramics
• Si_3N_4
• SiC
• Crack-Healing
• Contact Strength
• Sphere Indentation

Details

• CRID: 1390282679455562368
• NII Article ID: 110007819843
• NII Book ID: AN0018742X
• DOI: 10.1299/kikaia.76.1379
• ISSN: 18848338
• ISSN: 03875008
• ISSN: http://id.crossref.org/issn/03875008
• NDL BIB ID: 10883396
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10883396
• Web Site: https://www.jstage.jst.go.jp/article/kikaia1979/76/770/76_KJ00006666068/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed