In-Situ Observation of Growth Morphologies in Organic Peritectics


In-Situ Observation of Growth Morphologies in Organic Peritectics

Johann P. Mogeritsch, Andreas Ludwig

Johann P. Mogeritsch, Andreas Ludwig "In-Situ Observation of Growth Morphologies in Organic Peritectics" Published in International Journal of Trend in Research and Development (IJTRD), ISSN: 2394-9333, Special Issue | ICTIMESH-18 , December 2018, URL: http://www.ijtrd.com/papers/IJTRD19245.pdf

Directional solidification experiments were performed with the binary transparent organic model system TRIS-NPG to investigate peritectic solidification close to the limit of constitution under cooling. The experiments were carried out as in-situ observation in a vertical micro Bridgman-furnace. Since the primary and the peritectic phases do not differ optically, only changes at the phase boundaries are visible. In this paper, we report on observed solidification morphologies. Growth of the peritectic phase in the interstitial liquidoccurred under conditions in which both phases solidify in a cellular or dendritic manner. Peritectic layered structures were detectedclose to the critical velocity,at which both phases solidify in a planar manner. For a planar solidification front, the formation of the peritectic phase in the form of roundish inclusions was observed,whereby theseinclusions have originate at the solid/liquid interface.

Organic Model System, Peritectic Solidification Structures, Bridgman-Furnace


Special Issue | ICTIMESH-18 , December 2018

2394-9333

IJTRD19245
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