Abstract
In this paper, we present the in-situ investigation on microstructure evolution of metal powders during microwave sintering by using synchrotron radiation X-ray computed tomography (SR-CT) technique. Through the experimental reconstructed images, sequential 2-D and 3-D microstructure evolution phenomena of the same grains set were clearly observed, such as the rearrangement and migration of particles, the formation and growth of sintering neck, and the removal of large initial differences in surface curvature. Moreover, anomalous sintering neck growth kinetics mechanisms (log( x/a) − log ( t)) during microwave sintering process were revealed and compared with the conventional sintering experiment, the reasons for these phenomena may be the “non-thermal effects”.
Published Version
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