Improvement of the Contact Strength of Si3N4/SiC by a Combination of Shot Peening and Crack-Healing

• TAKAHASHI Koji

  Yokohama National University

• NISHIO Yoshitada

  Guraduate School, Yokohama National University

Abstract

The combination effects of shot peening (SP) and crack-healing on the contact strength of ceramics were investigated. Si₃N₄/SiC composite ceramics with high crack-healing ability were subjected to SP using zirconium oxide shots with several peening pressures and shot diameters. Then, some of the specimens subjected to SP were heat-treated in air to heal the surface cracks induced by SP. The residual stress, the apparent fracture toughness and the Weibull distribution of the contact strength were investigated. As a result, it was found that the combination of SP and crack-healing is effective for increasing the contact strength and decreasing the scatter of the contact strength.

Journal

• Journal of Solid Mechanics and Materials Engineering

  Journal of Solid Mechanics and Materials Engineering 6 (2), 144-153, 2012

  The Japan Society of Mechanical Engineers

Keywords

• Ceramics
• Fracture Toughness
• Residual Stress
• Shot Peening
• Crack-Healing
• Contact Strength

Details

• CRID: 1390282680242347136
• NII Article ID: 130002072466
• DOI: 10.1299/jmmp.6.144
• BIBCODE: 2012JSMME...6..144T
• ISSN: 18809871
• Web Site: http://www.jstage.jst.go.jp/article/jmmp/6/2/6_2_144/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed