Early stage spinodal decomposition in viscoelastic fluids

1996 ◽  
Vol 105 (18) ◽  
pp. 8304-8313 ◽  
Author(s):  
V. Kumaran ◽  
G. H. Fredrickson
Keyword(s):  
Spinodal Decomposition ◽  
Early Stage ◽  
Viscoelastic Fluids

scholarly journals The Effects of Inhomogeneous Elasticity and Dislocation on Thermodynamics and the Kinetics of the Spinodal Decomposition of a Fe-Cr System: A Phase-Field Study

Metals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1209
Author(s):  
Wooseob Shin ◽  
Jeonghwan Lee ◽  
Kunok Chang
Keyword(s):  
Spinodal Decomposition ◽  
Phase Field ◽  
Early Stage ◽  
Field Method ◽  
Phase Field Method ◽  
Precipitate Size ◽  
System A ◽  
Phase Separation Kinetics ◽  
Cr Concentration ◽  
Cr System

The effects of inhomogeneous elasticity and dislocation on the microstructure evolution of α′ precipitate in a Fe-Cr system was investigated using a Computer Coupling of Phase Diagrams and Thermochemistry (CALPHAD)-type free energy incorporated phase-field method. In order to simulate the precipitation behavior by phase-field modeling in consideration of inhomogeneous elasticity, a Multiphysics Object-Oriented Simulation Environment (MOOSE) framework was used, which makes it easy to use powerful numerical means such as parallel computing and finite element method (FEM) solver. The effect of inhomogeneous elasticity due to the compositional inhomogeneity or the presence of dislocations affects the thermodynamic properties of the system was investigated, such as the lowest Cr concentration at which spinodal decomposition occurs. The effect of inhomogeneous elasticity on phase separation kinetics is also studied. Finally, we analyzed how inhomogeneous elasticity caused by compositional fluctuation or dislocation affects microstructure characteristics such as ratio between maximum precipitate size with respect to the average on early stage and later stage, respectively.

Validity of linear analysis in early-stage spinodal decomposition of a polymer mixture

2000 ◽  
Vol 113 (8) ◽  
pp. 3414-3422 ◽  
Author(s):  
Masaki Hayashi ◽  
Hiroshi Jinnai ◽  
Takeji Hashimoto
Keyword(s):  
Spinodal Decomposition ◽  
Early Stage ◽  
Linear Analysis ◽  
Polymer Mixture

Kinetics of phase separation at the early stage of spinodal decomposition in epoxy resin modified with PEI blends

2008 ◽  
Vol 287 (1) ◽  
pp. 23-28 ◽  
Author(s):  
Wenjun Gan ◽  
Yingfeng Yu ◽  
Xiaoyun Liu ◽  
Minghai Wang ◽  
Shanjun Li
Keyword(s):  
Phase Separation ◽  
Epoxy Resin ◽  
Spinodal Decomposition ◽  
Early Stage ◽  
Kinetics Of

Deviation of early stage of spinodal decomposition from the Cahn-Hilliard-Cook theory observed in an isotopic polymer blend

1997 ◽  
Vol 234-236 ◽  
pp. 245-246 ◽  
Author(s):  
G. Müller ◽  
D. Schwahn ◽  
H. Eckerlebe ◽  
J. Rieger ◽  
T. Springer
Keyword(s):  
Spinodal Decomposition ◽  
Polymer Blend ◽  
Early Stage

Numerical Simulation of Spinodal Deposition in Cu–6at.%Ni–3at.%Si Ternary Alloy Using of Phase Field Method

2011 ◽  
Vol 704-705 ◽  
pp. 1410-1415 ◽  
Author(s):  
Yong Qiang Long ◽  
Ping Liu ◽  
Yong Liu ◽  
Shu Guo Jiao ◽  
Bao Hong Tian
Keyword(s):  
Spinodal Decomposition ◽  
Ternary Alloy ◽  
Phase Field ◽  
Elastic Energy ◽  
Early Stage ◽  
Phase Field Model ◽  
Field Method ◽  
Phase Field Method ◽  
Growth Exponent ◽  
Dynamics Calculation

Based on Cahn-Hilliard nonlinear diffusion equation, the phase field model has been established for ternary alloy spinodal decomposition, which directly couples with Calphad thermodynamics and dynamics calculation and takes into account the effect of the coherent elastic energy. The simulated microstructures of spinodal decomposition were carried out in the isothermally-aged of Cu-6at.%Ni-3at.%Si alloy. The results indicate that the spinodal decomposition takes place at the early stage of Cu-6at.%Ni-3at.%Si alloy aging at temperatures of 723K, forming two-phases mixture of Cu-rich and Ni/Si-rich, and the decomposition microstructures are distributed in a semi-interconnected labyrinth-like form. Under the effect of the coherent elastic energy, the decomposition microstructures demonstrate the obvious anisotropic characteristics, and present interconnected rectangular stripes aligned along [10] and [01] directions. The growth of the decomposition microstructures is in accordance with the growth law of growth exponentn≈0.29, slightly less than the LSW’s prediction.

Lattice Imaging of Spinodal Alloys

1975 ◽  
Vol 33 ◽  
pp. 22-23
Author(s):  
R. Gronsky ◽  
M. Okada ◽  
R. Sinclair ◽  
G. Thomas
Keyword(s):  
Spinodal Decomposition ◽  
Direct Detection ◽  
Early Stage ◽  
Lattice Parameter ◽  
X Ray Diffraction ◽  
Lattice Imaging ◽  
Large Specimen ◽  
Ordered Alloys ◽  
Specimen Area ◽  
Stage Composition

Spinodal decomposition in alloys has previously been studied1 by x-ray diffraction and conventional T.E.M., techniques which are used to reveal the wavelengths of the early stage composition modulations through diffracted intensities averaged over a large specimen area. The present paper describes recent progress on DIRECT detection by the lattice imaging technique of the localized variations in lattice parameter characteristic of spinodal decomposition. As in previous studies of ordered alloys this application of lattice imaging avoids the necessity of interpreting severe fringe distortions associated with lattice defects.

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