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

Journal Article · Thu Feb 15 00:00:00 EST 2018 · Technical Physics Letters

DOI:https://doi.org/10.1134/S1063785018020219· OSTI ID:22786530

Tyurin, A. I.; Zhigachev, A. O.; Guseva, D. G.; Ovchinnikov, P. N. ^[1]

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1. Tambov State University (Russian Federation)

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}).

• OSTI ID: 22786530
• Journal Information: Technical Physics Letters, Vol. 44, Issue 2; Other Information: Copyright (c) 2018 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7850
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
ALUMINIUM OXIDES
CALCIUM OXIDES
CERAMICS
CORUNDUM
FRACTURE PROPERTIES
MICROHARDNESS
NANOSTRUCTURES
SINTERING
ZIRCONIUM OXIDES