Analysis of the Grain Growth of Nano Y-TZP Materials

Abstract

Abstract: The behavior and activation energy of the grain growth of the nano Y-TZP materials during pressureless sintering, hot-pressing and SPS were analyzed. It was found
that from 1100℃ to 1300℃, the grain growth behaviour for the three sintering methods is different. When sintered by hot-pressing and SPS, the grain
grows faster than that by pressureless sintering. These phenomena can be partly explained by the activation energy of the grain growth. The activation energy
of the grain growth during pressureless sintering is about 300kJ/mol. During hot-pressing, the activation energy is less than that during pressureless sintering
because of the promoting of the applied stress on the diffusion. During SPS processing, the surfaces of particles are activated by pulsed current, so the activation energy
is significantly decreased.

Key words: nano Y-TZP materials, sintering, grain growth

CLC Number:

TB323

LI Wei,GAO Lian,GUI Lin-Hua,GUO Jing-Kun. Analysis of the Grain Growth of Nano Y-TZP Materials[J]. Journal of Inorganic Materials.

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Analysis of the Grain Growth of Nano Y-TZP Materials

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