R-curve behavior in ferrite ceramics [electronic resource].
- Washington, D.C : United States. Dept. of Energy. Office of the Assistant Secretary for Defense Programs, 1990.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- Pages: (20 pages) : digital, PDF file
- Additional Creators:
- Sandia National Laboratories
United States. Department of Energy. Office of the Assistant Secretary for Defense Programs
United States. Department of Energy. Office of Scientific and Technical Information
- The unusual dependence of the fracture mode of ferrite ceramics on the stress intensity factor in the subcritical crack growth regime was used to create flaws with different concentrations of crack-interface bridges. Flaws with numerous bridges were produced by indenting under dry silicone oil, while flaws with essentially no bridges were produced by indenting under water. Plots of log failure stress as a function of log indenter load for the two types of flaws reflect the differences in bridging. Those with extensive bridging showed pronounced R-curve behavior. The curve for those initially devoid of bridges showed no plateau but did show deviations from a −1/3 slope that correspond to those predicted by Bennison and Lawn for this type of flaw. The ferrite studies was 62.4 Fe₂O₃ 26.6 MnO, 11.2nO, and .04 V₂O₅. 10 figs.
- Published through SciTech Connect.
American Ceramic Society conference on fractography of glasses and ceramics, Alfred, NY (USA), 15-18 Jul 1990.
Beauchamp, E.K.; Monroe, S.L.
- Funding Information:
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