Abstract
Roles of calcination and sintering schedules on the final sintered density and microstructure of Y 2 O 3 compacts were studied. Optimum calcination procedure appeared to be at 1000°C and for one hour in air atmosphere. Final sintered density of 95% theoretical was achieved around 1450° and nearly pore free (>99% theoretical) pellets were obtained at 1650°C for one hour sintering in vacuum. High heating/cooling rates when coupled with high sintering temperature caused discontinuous grain growth and large internal cracks.
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