Thermodynamic phase-field model for microstructure with multiple components and phases: the possibility of metastable phases

Details Thermodynamic phase-field model for microstructure with multiple components and phases: the possibility of metastable phases Thermodynamic phase-field model for microstructure with multiple components and phases: the possibility of metastable phases

2010-05-25

arxiv.org/abs/1005.4696v2

Phys. Rev. E 83, 061602 (2011)

Physics

Condensed Matter

Materials Science

14 pages, 8 figures

Scientific paper

10.1103/PhysRevE.83.061602

A diffuse-interface model for microstructure with an arbitrary number of components and phases was developed from basic thermodynamic and kinetic principles and formalized within a variational framework. The model includes a composition gradient energy to capture solute trapping, and is therefore suited for studying phenomena where the width of the interface plays an important role. Derivation of the inhomogeneous free energy functional from a Taylor expansion of homogeneous free energy reveals how the interfacial properties of each component and phase may be specified under a mass constraint. A diffusion potential for components was defined away from the dilute solution limit, and a multi-obstacle barrier function was used to constrain phase fractions. The model was used to simulate solidification via nucleation, premelting at phase boundaries and triple junctions, the intrinsic instability of small particles, and solutal melting resulting from differing diffusivities in solid and liquid. The shape of metastable free energy surfaces is found to play an important role in microstructure evolution and may explain why some systems premelt at phase boundaries and phase triple junctions while others do not.

Affiliated with

Also associated with

No associations

Rating

Thermodynamic phase-field model for microstructure with multiple components and phases: the possibility of metastable phases does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Thermodynamic phase-field model for microstructure with multiple components and phases: the possibility of metastable phases, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermodynamic phase-field model for microstructure with multiple components and phases: the possibility of metastable phases will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-604575