Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10624774 | Ceramics International | 2015 | 8 Pages |
Abstract
Two basic aspects of fracture toughness for 3Â mol% yttria-stabilized zirconia ceramics at cryogenic temperatures have been systematically investigated, including crack propagation resistance evaluation and fractographic assessments. By comparison with the obtained R-curve parameters, the calculated shielding stress intensity factors were significantly smaller than the measured ones from the R-curve at various temperatures, and the difference between calculated and measured terms could be minimized if the partial reversibility in the transformation and shear contributions were taken into account, or by assuming that there was some contribution to toughening from microcracking. In addition, the quantitative results of fracture mode were also presented showing a higher intergranular fraction at 77Â K than at 293Â K, which may be harmful to the fracture toughness.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Weijiang Xue, Jian Yi, Zhipeng Xie, Chang-An Wang,