Non-thermal effect on densification kinetics during microwave sintering of α-alumina

F Zuo,S Saunier,C Meunier,D Goeuriot

doi:10.1016/j.scriptamat.2013.05.016

F Zuo, S Saunier + Show 2 more

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https://doi.org/10.1016/j.scriptamat.2013.05.016

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Abstract

The microstructural evolution and densification kinetics of a-alumina were investigated and compared between conventional sintering and microwave sintering at 2.45 GHz in the intermediate stage, where the microwave seems to be the most efficient. Based on classical kinetics models, the calculated kinetics parameter demonstrated that the densification is greatly influenced by the presence of an electromagnetic field during sintering. It was assumed that the grain boundary diffusion is enhanced by an electromagnetic pressure induced by the microwave. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Highlights

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not
Based on classical kinetics models, the calculated kinetics parameter demonstrated that the densification is greatly influenced by the presence of an electromagnetic field during sintering
It is well known that microwave sintering results in a higher heating rate and a lower sintering time compared with conventional sintering

Summary

Introduction

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. Non-thermal effect on densification kinetics during microwave sintering of a-alumina The microstructural evolution and densification kinetics of a-alumina were investigated and compared between conventional sintering and microwave sintering at 2.45 GHz in the intermediate stage, where the microwave seems to be the most efficient.

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