Abstract
The relationship between microstructures and sintering, heat treatment processes have been investigated in 8mol% MgO-0.5mol% Y2O3-PSZ ceramics. The result show that the T phase exhibits two different morphologies during sintering below 1800°C and isothermal holding or aging anew at 1500°C. Their shape, size, distribution and stability all have obvious difference, so they have different effects on the phase transformation toughening.
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