Sintering densification, structural analysis, microstructure and mechanical properties of Al2O3(MgO)/ZrO2(Y2O3) composite ceramics
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Composite ceramics between Al2O3 (6 mol% MgO); AM and ZrO2 (4 mol% Y2O3); ZY with 40:60, 50:50, and 60:40 ratiowere prepared. The samples were sintered under different sintering method between normal sintering and two-step sinteringmethod. The effects of the different contents of AM and ZY and sintering condition on the structural analysis, densification,microstructure and mechanical behavior were studied. It was found that composites with higher proportions of ZrO2 showedhigher weight percentages of t-ZrO2 and c-ZrO2 phases which is obtained high density and good mechanics properties. TheFracture toughness mechanisms of composites are also discussed in detail around the sintering parameters. The AM:ZYcomposite ceramics that provides good mechanical properties were revealed in both sintering method in optimum conditions.
Abstract
Composite ceramics between Al2O3 (6 mol% MgO); AM and ZrO2 (4 mol% Y2O3); ZY with 40:60, 50:50, and 60:40 ratiowere prepared. The samples were sintered under different sintering method between normal sintering and two-step sinteringmethod. The effects of the different contents of AM and ZY and sintering condition on the structural analysis, densification,microstructure and mechanical behavior were studied. It was found that composites with higher proportions of ZrO2 showedhigher weight percentages of t-ZrO2 and c-ZrO2 phases which is obtained high density and good mechanics properties. TheFracture toughness mechanisms of composites are also discussed in detail around the sintering parameters. The AM:ZYcomposite ceramics that provides good mechanical properties were revealed in both sintering method in optimum conditions.