Abstract
The firing behavior of β-Si3N4 powder corroded under hydrothermal conditions was investigated by transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDX). TEM and EDX analyses suggested that the hydrothermal treatment enhanced the formation of transient growth bands in β-Si3N4 ceramics containing Y2O3-Nd2O3 additive during firing at high temperature. Also, EDX analysis indicated that the grain boundary regions around the grown β-Si3N4 grains contained a Y-Nd-Si-O-N phase.
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