Table of Contents
Journal of Powder Technology
Volume 2013 (2013), Article ID 946984, 5 pages
Research Article

Improvement of the Contact Strength of Al2O3/SiC by a Combination of Shot Peening and Crack-Healing

Faculty of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan

Received 1 March 2013; Accepted 25 April 2013

Academic Editor: Kotoji Ando

Copyright © 2013 Tomoya Oki et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Al2O3/SiC composite ceramics with high crack-healing ability were subjected to shot peening (SP) using zirconium oxide shots with several peening pressures and shot diameters. 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, revealing that the combination of SP and crack-healing is effective for increasing the contact strength and decreasing the scatter of the contact strength of Al2O3/SiC.