The Influence of Corundum Content and Sintering Temperature on the Mechanical Properties of CaO–ZrO{sub 2}–Al{sub 2}O{sub 3} Ceramic Composites

We have studied the mechanical properties (Vickers microhardness H{sub V} and fracture toughness K{sub C}) of nanostructured CaO–ZrO{sub 2}–Al{sub 2}O{sub 3} ceramic composites as dependent on the content of corundum (0 ≤ C{sub Al{sub 2O{sub 3}}} ≤ 25%) and the temperature of sintering (1250°C ≤ T{s...

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Bibliographic Details
Published in:Technical physics letters 2018-02, Vol.44 (2)
Main Authors: Dmitrievskii, A. A., Tyurin, A. I., Zhigachev, A. O., Guseva, D. G., Ovchinnikov, P. N.
Format: Article
Language:English
Subjects:
ALUMINIUM OXIDES
CALCIUM OXIDES
CERAMICS
CORUNDUM
FRACTURE PROPERTIES
MATERIALS SCIENCE
MICROHARDNESS
NANOSCIENCE AND NANOTECHNOLOGY
NANOSTRUCTURES
SINTERING
ZIRCONIUM OXIDES
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Summary:We have studied the mechanical properties (Vickers microhardness H{sub V} and fracture toughness K{sub C}) of nanostructured CaO–ZrO{sub 2}–Al{sub 2}O{sub 3} ceramic composites as dependent on the content of corundum (0 ≤ C{sub Al{sub 2O{sub 3}}} ≤ 25%) and the temperature of sintering (1250°C ≤ T{sub 1} ≤ 1500°C). Optimum value of the corundum content (C{sub Al{sub 2O{sub 3}}} = 5%) and optimum regime (T{sub 1} = 1300°C, 5 min; T{sub 2} = 1200°C, 4 h) of two-stage sintering are established, which favor attaining the best mechanical characteristics of ceramic composites (H{sub V} = 12.25 GPa, K{sub C} = 8.47 MPa m{sup 1/2}).
ISSN:1063-7850
1090-6533
DOI:10.1134/S1063785018020219