Abstract
Based on the observation that the ratio of the perimeter, P, to the square root of the area, A0.5, of the grains for a given material is nearly constant, it is suggested that the grain shape may be treated as a regular polygon with a non-integral side number. Examining the variation of P/A0.5-ratio with sintering holding time may provide useful information for sintering dynamics. Further analysis suggests that the P/A0.5-ratio may be a potential parameter for studying the grain-boundary effect in polycrystalline materials.
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