Correlation between microstructure and mechanical properties of Al2O3/ZrO2 nanocomposites

Mechanical properties and microstructural evolution of alumina–zirconia nanocomposites by microwave sintering

“…Therefore, dense fine-grained and full-dense Al 2 O 3 -ZrO 2 composites are desirable to be achieved [10][11][12]. Unfortunately, it is difficult to obtain Al 2 O 3 -ZrO 2 composites with high density and smaller grain size with conventional techniques.…”

“…Al 2 O 3 -ZrO 2 composites with high transformation toughening can be obtained if a amount of tetragonal phase with the ability to transform under applied stress is retained at room 3 temperature [7,8]. To meet this requirement, the size of zirconia grain must be smaller than a critical size (0.7 μm) to ensure the stability of tetragonal phase at room temperature [9][10][11]. A fine-grained Al 2 O 3 matrix also results in enhanced mechanical properties.…”

Properties of zirconia-toughened-alumina prepared via powder processing and colloidal processing routes

“…Very recently, Guimaraes et al investigated ZrO 2 -Al 2 O 3 nanocomposites using a powder processing approach [10]. They used a suspension of ZrO 2 with 0.5 wt% of aminobenzoic acid (as a deflocculant), in alcohol.…”

Densification and mechanical properties of fine-grained Al2O3–ZrO2 composites consolidated by spark plasma sintering

“…Furthermore, it is suggested that a smaller matrix size (grain at submicron level or nanoscale) will result in a higher improvement in mechanical property. Therefore, dense fine-grained Al 2 O 3 -ZrO 2 composites are desirable to be achieved [7][8][9]. Unfortunately, it is difficult to obtain Al 2 O 3 -ZrO 2 composites with high density and smaller grain size.…”

“…Al 2 O 3 -ZrO 2 composites with high transformation toughening can be obtained if a high portion of tetragonal phase with the ability to transform under applied stress is retained at room temperature [4,5]. To meet this requirement, the size of zirconia grain must be lower than a critical size (0.7 m) to ensure the stable of tetragonal phase at room temperature [6][7][8]. A fine-grained matrix Al 2 O 3 also results in an enhanced mechanical property.…”