Room-Temperature Strength and Fracture of ZrO2-Y2O3 Single Crystals |
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| Authors: | R P Ingel R W Rice D Lewis |
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| Affiliation: | Naval Research Laboratory, Washington, D.C. 20375 |
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| Abstract: | Strength and fracture toughness results are presented for ZrO2 single crystals stabilized with Y2O3. The crystals (2 cm in diameter by 5 cm long) were prepared by skull melting. The partially stabilized compositions with 4 to 6 wt% Y2O3 showed a dramatic improvement in mechanical properties over the fully stabilized samples containing 20 wt% Y2O3, i.e. a strength exceeding 1000 MPa and a fracture toughness of 8 Mpa,.m 1/2 were achieved compared to 200 MPa and 2 Mpa.m1/2, respectively, for fully stabilized ZrO2 single crystals. |
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