Abstract
Three Al2O3-ZrO2 composite series, containing 0, 2 and 7.5 mol % Y2O3, were fabricated for fracture toughness determinations. Without Y2O3 additions, tetragonal-phase ZrO2 could only be retained up to approximately 10 vol % ZrO2; additions of 2 mol % Y2O3 allowed full retention of the tetragonal phase up to 60 vol % ZrO2. Cubic ZrO2 was produced with additions of 7.5 mol % Y2O3. Significant toughening and strengthening was achieved when tetragonal ZrO2 was present.
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Lange, F.F. Transformation toughening. J Mater Sci 17, 247–254 (1982). https://doi.org/10.1007/BF00809060
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DOI: https://doi.org/10.1007/BF00809060