Comparative study among Al2O3, ZTA, MgO/ZTA & CuO/ZTA composites in terms of Mechanical Properties
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초록
Alumina (Al2O3) ceramics are one of the demanded materials in the current scenario due to its cheaper cost, abundance ofavailability and combination of high hardness and fracture toughness by reinforcement of ytrria stabilized zirconia (YSZ),Magnesium oxide (MgO), and Copper oxide (CuO). The effect of such additives inside alumina ceramics are carried out fromlast several decades but still there are many more phenomenons that are still inconclusive. So, a comparative study among thesaid additive in terms of mechanical properties is carried out to reveal the effect of YSZ, MgO and CuO additives insidealumina ceramics. At first, 10 wt. % of YSZ is doped inside the alumina matrix followed by 0.6 wt. % of MgO and 1.5 wt. % of CuO. The developed composites are thoroughly examined in terms of microstructure, bulk density, hardness, andfracture toughness. The results of the microstructure clearly reveal the homogeneous distribution of all additives inside thealumina matrix. A positive effect with YSZ and MgO is noticed on the bulk density and hardness whereas an adverse effectof CuO is observed. The values of fracture toughness are increases with all the additives due to the synergistic effect oftransformation toughening and crack bridging phenomenon.
Abstract
Alumina (Al2O3) ceramics are one of the demanded materials in the current scenario due to its cheaper cost, abundance ofavailability and combination of high hardness and fracture toughness by reinforcement of ytrria stabilized zirconia (YSZ),Magnesium oxide (MgO), and Copper oxide (CuO). The effect of such additives inside alumina ceramics are carried out fromlast several decades but still there are many more phenomenons that are still inconclusive. So, a comparative study among thesaid additive in terms of mechanical properties is carried out to reveal the effect of YSZ, MgO and CuO additives insidealumina ceramics. At first, 10 wt. % of YSZ is doped inside the alumina matrix followed by 0.6 wt. % of MgO and 1.5 wt. % of CuO. The developed composites are thoroughly examined in terms of microstructure, bulk density, hardness, andfracture toughness. The results of the microstructure clearly reveal the homogeneous distribution of all additives inside thealumina matrix. A positive effect with YSZ and MgO is noticed on the bulk density and hardness whereas an adverse effectof CuO is observed. The values of fracture toughness are increases with all the additives due to the synergistic effect oftransformation toughening and crack bridging phenomenon.
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