Pore Evolution During Glow Discharge Sintering of Alumina

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Abstract
A series of experiments have been performed to demonstrate the applicability of small‐angle neutron scattering to the study of pore evolution during sintering. Samples of α‐Al2O3 which had been zone sintered in a hydrogen hollow cathode glow discharge to densities exceeding 94% of theoretical were employed in these preliminary measurements. The neutron scattering results indicate that densification during the final stages of glow discharge sintering occurs primarily through a reduction in the number of pores present with only a small change in the average pore size.