Strength Properties of Zirconium Ceramics with Silica Additives Hardened with Alumina
| Autor: | P. N. Ovchinnikov, Andrey O. Zhigachev, D. G. Zhigacheva, A. A. Dmitrievskii |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Zirconium Materials science chemistry.chemical_element Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Crystallography chemistry Flexural strength Phase composition visual_art 0103 physical sciences visual_art.visual_art_medium Ceramic 010306 general physics |
| Zdroj: | Physics of the Solid State. 63:295-299 |
| ISSN: | 1090-6460 1063-7834 |
| DOI: | 10.1134/s1063783421020050 |
| Popis: | The effect of Al2O3 and SiO2 admixtures on strength properties of calcia-stabilized zirconia ceramics is studied. Optimal ratios of the components of CaO–ZrO2 + Al2O3 + SiO2 are determined; at these ratios, high flexural and compressive strength limits (σf and σc, respectively) are observed. Their values are the following: σf = 980–70 MPa (at $${{C}_{{{\text{A}}{{{\text{l}}}_{{\text{2}}}}{{{\text{O}}}_{3}}}}}$$ of 5 wt % and $${{C}_{{{\text{Si}}{{{\text{O}}}_{{\text{2}}}}}}}$$ of 0 mol %) and σc = 2.44–0.15 GPa (at $${{C}_{{{\text{A}}{{{\text{l}}}_{{\text{2}}}}{{{\text{O}}}_{3}}}}}$$ of 5 wt % and $${{C}_{{{\text{Si}}{{{\text{O}}}_{{\text{2}}}}}}}$$ of 5 mol %). Signs of plasticity (appearance of a yield line on σ–e diagrams) are observed at the introduction of 4–5% SiO2 in the CaO–ZrO2 + Al2O3 ceramics. |
| Databáze: | OpenAIRE |
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