Resistance to Fracture of a Partially Stabilized Zirconia/β-Alumina Composite |
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| Authors: | Thomas B Troczynski Patrick S Nicholson |
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| Affiliation: | Ceramic Engineering Research Group, Department of Metallurgy and Materials Science, McMaster University, Hamilton, Ontario, Canada |
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| Abstract: | Partially stabilized zirconia (PSZ) /β-alumina composites exhibit extensive non-elastic deformation during fracture. Repeated loading/stable fracture/unloading experiments were performed on chevron-notched four-point-bend specimens of the composite and pure PSZ. The energy consumption during the propagation of long cracks in the composite (∼500 J/m2) is 1 order of magnitude larger than for PSZ (∼50 J/m2). Breaking strengths of 127 MPa were obtained with a Weibull modulus of 43. |
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