High-temperature fatigue strength of crack-healed Al2O3 toughened by SiC whiskers

Kotoji Ando; Sang-Kee Lee; Koji Takahashi; Masahiro Yokouchi

doi:10.1117/12.580720

16 February 2004 High-temperature fatigue strength of crack-healed Al2O3 toughened by SiC whiskers

Kotoji Ando, Sang-Kee Lee, Koji Takahashi, Masahiro Yokouchi

Proceedings Volume 5648, Smart Materials III; (2004) https://doi.org/10.1117/12.580720
Event: Smart Materials, Nano-, and Micro-Smart Systems, 2004, Sydney, Australia

Abstract

Al₂O₃ reinforced by SiC whiskers (Al₂O₃/SiC-W) was sintered in order to investigate the fatigue strength of crack-healed specimens at high temperature. A semi-elliptical surface crack of 100μm in surface length was introduced on each specimen surface. These specimens were crack-healed at 1300°C for 1 h in air, and static and cyclic fatigue strengths were systematically investigated at room temperature, 900°C, and 1100°C by three-point bending. The static and cyclic fatigue limits of the crack-healed specimens were more than 70% of the average bending strength at each testing temperature. Crack-healed specimens of Al₂O₃/SiC-W were not sensitive to static and cyclic fatigues at room temperature and high temperatures. Therefore, the combination of crack-healing and whisker reinforcement can play an important role in increasing static and cyclic fatigue strengths at high temperature.

Citation Download Citation

Kotoji Ando, Sang-Kee Lee, Koji Takahashi, and Masahiro Yokouchi "High-temperature fatigue strength of crack-healed Al2O3 toughened by SiC whiskers", Proc. SPIE 5648, Smart Materials III, (16 February 2004); https://doi.org/10.1117/12.580720

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available