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- Title
R-Curve Behavior of 3 Y- TZP at Cryogenic Temperatures.
- Authors
Weijiang Xue; Zhipeng Xie; Guanwei Liu; Wei Liu; Jian Yi; Munz, D.
- Abstract
We reported, for the first time, the R-curve behavior of zirconia ceramic stabilized with 3 mol% Y2O3 (3 Y- TZP) at cryogenic temperatures down to liquid nitrogen temperature of 77 K, measured using direct indentation method and analyzed together with the Weibull statistical analysis of fracture strength data. The results provided a detailed understanding on the effect of decreasing temperature to the steady-state fracture toughness K ∞ that only the increase in the transformation toughening shielding term ΔKT contributed to the K ∞ value at cryogenic temperatures, whereas the intrinsic fracture toughness K0 is independent of temperature. A more pronounced R-curve behavior unanticipated by the conventional interpretation was found at cryogenic temperatures, which could be of great significance to the concomitant increment of the fracture strength and toughness. Therefore, it is believed that 3 Y- TZP could be one of the most promising materials in cryogenic structural applications.
- Subjects
ZIRCONIUM oxide; NITROGEN spectra; LOW temperature engineering; LIQUEFIED gases; CERAMICS
- Publication
Journal of the American Ceramic Society, 2011, Vol 94, Issue 9, p2775
- ISSN
0002-7820
- Publication type
Article
- DOI
10.1111/j.1551-2916.2011.04711.x