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Published February 1996 | public
Journal Article

Room-Temperature Cyclic Fatigue of Reaction-Bonded Silicon Nitride Using the Double Cleavage Drilled Compression Specimen

Abstract

The double cleavage drilled compression specimen was used to study the room-temperature cyclic fatigue behavior of reaction-bonded silicon nitride (RBSN). Fatigue results were compared with slow crack growth under static loading. The fatigue exponent for RBSN was found to be 40, although no slow crack growth occurred under static loading. The fatigue threshold for RBSN was as low as 0.5/K_(lc) and dependent upon loading conditions. Crack growth behavior and electron microscopy provided evidence that the fatigue mechanism was due to asperity and debris wedging at the crack face.

Additional Information

© 1996 The American Ceramic Society. Manuscript No. 193083. Received October 28, 1994: approved January 7, 1995. Presented at the 96th Annual Meeting of the American Ceramic Society, Indianapolis, IN, April 27, 1994 (Fracture, Deformation, and Mechanical Reliability Symposium, Paper No. SXI-48-94). Supported by NIST through the Program for Integrated Design, NDE and Manufacturing Sciences, Award No. 70NANB2H1230. The authors thank Dr. Hongda Cai for his advice on the DCDC specimen.

Additional details

Created:
August 20, 2023
Modified:
October 17, 2023