Morphological Evolution of SCN Crystals in a Shear Flow

Abstract:

Morphological evolution of a transparent model succinonitrile (SCN) material during solidification was investigated in an apparatus resembling a shearing-disc viscometer. The in situ microscopic observations showed that fragmentation decreased the average particles size, but did not result in transition of dendritic to spherical morphology. At low shear rates, the degenerated dendrites and at high shear rates, the pseudo-cluster morphology was observed. It was revealed that coarsening has the most important effect on the final morphology of solid particles. The quantitative influences of shearing rate and intensity on the size and morphology of solid crystals were also discussed based on the measurements on the microstructures.

• Periodical: Solid State Phenomena (Volumes 217-218)
• Pages: 83-90
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.217-218.83
• Online since: September 2014
• Authors: Mehdi Reisi*, BEHZAD NIROUMAND, Ebrahim Shirani
• Keywords: In Situ Microscopic Observation, SCN, Shear Flow, Solidification

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