We have studied the mechanical properties (Vickers microhardness HV and fracture toughness KC) of nanostructured CaO–ZrO2–Al2O3 ceramic composites as dependent on the content of corundum (0 ≤ $$C_{Al_{2}O_{3}}$$CAl2O3 ≤ 25%)… Click to show full abstract
We have studied the mechanical properties (Vickers microhardness HV and fracture toughness KC) of nanostructured CaO–ZrO2–Al2O3 ceramic composites as dependent on the content of corundum (0 ≤ $$C_{Al_{2}O_{3}}$$CAl2O3 ≤ 25%) and the temperature of sintering (1250°C ≤ T1 ≤ 1500°C). Optimum value of the corundum content ($$C_{Al_{2}O_{3}}$$CAl2O3 = 5%) and optimum regime (T1 = 1300°C, 5 min; T2 = 1200°C, 4 h) of two-stage sintering are established, which favor attaining the best mechanical characteristics of ceramic composites (HV = 12.25 GPa, KC = 8.47 MPa m1/2).
Journal Title: Technical Physics Letters
Year Published: 2018
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