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Showing 1 to 16 of 16 for “"Gibbs-Thomson"”.
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On the Melting and Crystallization of Linear Polyethylene, Poly(ethylene oxide) and Metallocene Linear Low-Density Polyethylene
… equilibrium melting temperature obtained by the Gibbs-Thomson approach and the C2 value extracted from the initial lamellar thickness vs. reciprocal of undercooling plot were similar within the limits of experimental error to those obtained here through the non-linear Hoffman-Weeks method. In the …
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Critical size for bulk-to-discrete transition and segment-induced size effect melting of 2D aliphatic layers
… deviates from that predicted by the classical Gibbs-Thomson model by as large as 50 K. Such unique deviation is also observed in structural parameters related to the local environment and dynamics of carbon groups, which are utilized to divide the alkyl chains into three segments. The previous …
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Phasenverhalten reiner Stoffe in mesoporösen Silika-Materialien
… vom Porenradius R$ gemäß einer modifizierten Gibbs-Thomson-Gleichung Delta T = K/(R-t) gefunden, wobei der Wert von K mit dem aus thermodynamischen Daten ermittelten Gibbs-Thomson-Koeffizienten gut übereinstimmt und die Korrekturgröße t einer Schichtdicke von nicht gefrierendem Wasser von 1-2 …
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Phase-field simulation of freezing water droplet
… deal.ii library. Our model reproduces the Gibbs-Thomson and Clausius-Clapeyron equations, which establish the dependence of the melting temperature on interface curvature and pressure, respectively. Furthermore, the built-in quasi-compressibility accurately accounts for the volume change …
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A sharp interface isogeometric strategy for moving boundary problems
… gradient and enables the imposition of Gibbs-Thomson condition during solidification simulation.</p> <p>The shape optimization through configuration of finite-sized heterogeneities is lastly studied. The optimization relies on the recently derived configurational derivative that …
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Atomistic simulations of driven alloys: a study of effective temperature models for low and high temperature applications
… varies with the precipitate size reminiscent of Gibbs-Thomson-like behavior; (iii) the effective temperature scales with the shear modulus of the alloy, thereby supporting the proposal of a modified ETM (METM) for low-temperature SPD of immiscible alloys. The simulations are also shown to agree …
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Crystallization and Melting Studies of Poly(ε-caprolactone) and Poly(ethylene oxide) using Flash™ Differential Scanning Calorimetry and Preparation and Characterization of Poly(δ-valerolactone) Fractions
… temperatures by a constant, so the Gibbs-Thomson method was used instead, yielding an equilibrium melting temperature of 103.4 ± 2.3°C. A modification was proposed to the non-linear Hoffman-Weeks equation that included a non-linear undercooling dependence for the kinetic fold surface …
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Nanoporosity Formation in Ag-Au Alloys
… elevated temperatures, alloy passivation, and Gibbs-Thomson effects. The average pore size and distribution was found to depend on the electrolyte composition, dealloying rate, applied potential and time. The porosity was found to significantly coarsen at room temperature during the dealloying …
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Phase-field Modeling of Phase Change Phenomena
… In particular, we explain how the Gibbs-Thomson effect and the kinetic effect are recovered. Thirdly, we couple the Allen-Chan and heat transfer equations in a way that the whole system has the energy decay property. We also propose a convex-splitting-based numerical scheme that …
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The interplay of structure and optical properties in individual semiconducting nanostructures
… whose growth kinetics was a combination of Gibbs- Thomson-limited and diffusion-limited, followed by the domination of non-assisted film growth to form nanowalls. Nanoscale morphological variations, such as thickness variations and the presence of dislocations and Au nanoparticles, were …
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A Study of Crystallization in Bisphenol-A Polycarbonate
… at either 223°C or 228°C for various times. The Gibbs-Thomson relationship, which can be defined using the experiments mentioned, yielded two thermodynamic constants, the equilibrium melting temperature and the surface free energy. Including data from literature in the determination of the …
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Structural analysis of nanoparticles by small angle X-ray scattering
… drawn. This line was predicted by the Gibbs-Thomson equation according to the literature. This result is important because it allows controlling the crystalline thickness and physical properties of the system, by the temperature.
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Electrocatalytic activities of supported Pt nanoparticles for low-temperature fuel cell applications
… sizes, which is proposed to be due to the Gibbs- Thomson effect. The findings of the particle size effect on the ORR activities and instability suggest that a trade off between smaller NP catalysts, which gives a benefit of a larger mass activity, can suffer from fast degradation. …
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Structure-Property Relationships: Model Studies on Melt Extruded Uniaxially Oriented High Density Polyethylene Films Having Well Defined Morphologies
… and numerical values for the parameters in the Gibbs-Thomson equation that it is not believed to be suitable for quantitative analysis.
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Study of Polyethylene Crystallization
… interfaciale. Il a été montré que la loi de Gibbs-Thomson peut être reproduite, car cette loi dévoile une relation linéaire entre la température de fusion et l'inverse de l'épaisseur du cristal. Pour révéler efficacement l'impact des conditions environnementales sur le comportement de fusion …
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Mixed-Phase Solidification of Thin Silicon Films on Silicon Dioxide
… local equilibrium melting temperature using the Gibbs-Thomson relationship. This local-interface-curvature analysis reveals how the anisotropic nature of the Si/SiO2 interfacial energy and the film thickness affect the surface texture evolution observed during the MPS processing of Si films on …