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Abstract— <p>The phase diagram of 2-cyanoacetamide-4-bromonitrobezene system was examined, and it exhibits a monotectic and eutectic along with a wide miscibility gap. The mol fraction of a monotectic and a eutectic were 0.065 and 0.92 of 2-cyanoacetamide, respectively. The critical temperature is 63.5°C above the horizontal line of the monotectic. To compute the solid-liquid interface’s velocity (<InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11504_2025_6160_Article_IEq1.gif" Format="GIF" Height="10" Rendition="HTML" Resolution="72" Type="Linedraw" Width="12" /> </InlineMediaObject> <EquationSource Format="TEX">\({v}\)</EquationSource> <!--PhysChA2570057Arunbabu-m1--> </InlineEquation>) in a thin U-tube at various lowering temperatures (Δ<i>T</i>), the growth kinetics of the pure components and the binary mixtures (monotectic and eutectic) were examined. This shows that Hillig-Turnbull’s equation can be applied. The entropy of fusion data, which were obtained using differential scanning calorimeter (Mettler DSC-4000), and it was used to calculate the materials’ heating characteristics, including excess thermodynamic functions, roughness parameter, heat of mixing, entropy of fusion, and interfacial energy. The Cahn non-wetting condition’s applicability is confirmed by the energy of the solid-liquid interface statistics. Both the monotectic and eutectic microstructures were taken and described.</p>

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Thermal, Microstructural, and Phase Equilibria Investigations of an Organic Counterpart of a Nonmetal-Nonmetal Monotectic Alloy: 2-Cyanoacetamide-4-bromonitrobenzene System

  • 期刊论文

  • 发表日期：

    2025年6月15日

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  • B. Arun Babu,
  • N. Hussain Basha,
  • M. Sreenivasulu

摘要

Abstract—

The phase diagram of 2-cyanoacetamide-4-bromonitrobezene system was examined, and it exhibits a monotectic and eutectic along with a wide miscibility gap. The mol fraction of a monotectic and a eutectic were 0.065 and 0.92 of 2-cyanoacetamide, respectively. The critical temperature is 63.5°C above the horizontal line of the monotectic. To compute the solid-liquid interface’s velocity ( \({v}\) ) in a thin U-tube at various lowering temperatures (ΔT), the growth kinetics of the pure components and the binary mixtures (monotectic and eutectic) were examined. This shows that Hillig-Turnbull’s equation can be applied. The entropy of fusion data, which were obtained using differential scanning calorimeter (Mettler DSC-4000), and it was used to calculate the materials’ heating characteristics, including excess thermodynamic functions, roughness parameter, heat of mixing, entropy of fusion, and interfacial energy. The Cahn non-wetting condition’s applicability is confirmed by the energy of the solid-liquid interface statistics. Both the monotectic and eutectic microstructures were taken and described.