An Effect of Nb2O5 on Properties of 3Y-TZP Ceramics
This paper mainly studies the effect of Nb2O5 on the properties of 3Y-TZP ceramics,mainly including the effect on hardness,toughness and impact resistance after being polished.It combined with micro morphology and the crystal axis ratio analyzed by XRD phase diagram.The results show that the toughness of ceramics increases with the increase of Nb2O5 addition.The hardness showed a decreasing trend.The strength increased first,and then it decreased.The occurrence of this phenomenon is partly attributed to the addition of Nb2O5,which causes the ceramic to generate heterogeneous small grains.Thereby,it is providing heterogeneous particle toughening and hindering crack propagation.On the other hand,the introduction of Nb5+increases the crystal axis ratio,making it easier for phase changes to occur.In summary,the optimal mass fraction of Nb2O5 added is 0.5％.
3Y-TZPNb2O5Heterogeneous particle tougheningCrystal axis ratio
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