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Journal of Nanomaterials
Volume 2011 (2011), Article ID 728617, 6 pages
http://dx.doi.org/10.1155/2011/728617
Research Article

In Situ Investigation of the Silicon Carbide Particles Sintering

1Key Laboratory of Mechanical Behavior and Design of Materials, Chinese Academy Sciences, University of Science and Technology of China, Hefei 230026, China
2National Center for Nanoscience and Technology of China, Beijing 100190, China

Received 31 May 2010; Accepted 31 July 2010

Academic Editor: Jaetae Seo

Copyright © 2011 Yu Niu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A real-time observation of the microstructure evolution of irregularly shaped silicon carbide powders during solid state sintering is realized by using synchrotron radiation computerized topography (SR-CT) technique. The process of sintering neck growth and material migration during sintering are clearly distinguished from 2D and 3D reconstructed images. The sintering neck size of the sample is presented for quantitative analysis of the sintering kinetics during solid state sintering. The neck size-time curve is obtained. Compared with traditional sintering theories, the neck growth exponent (7.87) obtained by SR-CT experiment is larger than that of the two-sphere model. Such condition is discussed and shown in terms of sintering neck growth, in which the sintering process slows down when the particle shape is irregular rather than spherical.