Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1580225 | Materials Science and Engineering: A | 2009 | 5 Pages |
Abstract
Four ZrB2 composites were prepared by hot-pressing with different content of ZrO2, i.e., 0, 10, 20 and 30 vol%. By means of the indentation-strength method, damage tolerance and resistance-curve (R-curve) behavior were investigated for ZrB2–ZrO2 composites. Under the indentation load of 196 N, retained strength of monolithic ZrB2 was only ∼89 MPa, however, that value could reach ∼281 MPa for ZrB2–30 vol%ZrO2 composite. Obvious R-curve behavior was further found in ZrB2–ZrO2 composites compared with monolithic ZrB2. Regarding ZrB2–30 vol%ZrO2, the steady-state toughness was ∼6.5 MPa m1/2. Such improved toughening effect was attributed to the crack bridging and transformation toughening of ZrO2.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Tao Zhu, Weijie Li, Xinghong Zhang, Ping Hu, Changqing Hong, Ling Weng,