Abstract
The effect of heat treatment at 1340 — 1450°C on the sintering of ceramic powders of the A12O3-ZrO2-Y2O3 system obtained by the method of rapid solidification of the melt is considered. It is shown that in this temperature range powder particles undergo crystallization of the amorphous phase and an e-A12O3 → α-A12O3 transformation with the formation of an intraparticle ultradisperse polycrystalline structure of an eutectic type. The system attains a thermodynamically equilibrium state. However, the sinterability of compacts from such powders increases substantially, which is associated with the elevated contribution of the intraparticle grain boundary diffusion into the diffusion mass transfer.
Published Version
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