Early stages of spinodal decomposition in superfluidHe3-He4mixtures

1979 ◽  
Vol 20 (7) ◽  
pp. 2665-2675 ◽  
Author(s):  
P. C. Hohenberg ◽  
David R. Nelson
Keyword(s):  
Spinodal Decomposition ◽  
Early Stages

Early stages of spinodal decomposition in binary liquid crystal mixtures

2000 ◽  
Vol 113 (20) ◽  
pp. 9300-9309 ◽  
Author(s):  
Akihiko Matsuyama ◽  
Tadaya Kato
Keyword(s):  
Liquid Crystal ◽  
Spinodal Decomposition ◽  
Binary Liquid ◽  
Early Stages

The Measurement of Composition During the Early Stages of the Spinodal Decomposition of Fe-Cr Alloys

1990 ◽  
Vol 186 ◽  
Author(s):  
M.G. Hetherington ◽  
J.M. Hyde ◽  
M.K. Miller
Keyword(s):  
Monte Carlo ◽  
Phase Separation ◽  
Spinodal Decomposition ◽  
Atom Probe ◽  
Statistical Techniques ◽  
Fine Scale ◽  
Monte Carlo Calculations ◽  
Early Stages ◽  
Non Linear

AbstractThe properties of many advanced alloys are derived from extremely fine-scale microstructures. This poses interesting questions about the measurement of composition on this scale. The phase separation of model Fe-Cr alloys has been been studied with the atom-probe. Statistical techniques have been used to estimate the composition and compare the results with the predictions of linear and non-linear theories of spinodal decomposition and the distributions obtained from Monte-Carlo calculations.

Fractal morphologies from decomposition of Fe−Ni−Invar alloys

1997 ◽  
Vol 12 (1) ◽  
pp. 83-92 ◽  
Author(s):  
Q. Li ◽  
A. Wiedenmann ◽  
H. Wollenberger
Keyword(s):  
Neutron Scattering ◽  
Spinodal Decomposition ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Miscibility Gap ◽  
Early Stages ◽  
Invar Alloys ◽  
Precipitated Phase

Small angle neutron scattering investigations performed on Fe1−x–Nix alloys with 0.26 ≤ x ≤ 0.45 revealed a thermodynamically driven decomposition below 800 °C. The miscibility gap extends at least from 30 at.% Ni to 45 at.% Ni. The diffusioncontrolled decomposition produces fractal morphologies during the early stages of the process. During annealing the structure of the precipitated phase densifies continuously from mass fractals with small dimensionality (1 ≤ dm ≤ 3) to surface fractals with 2 ≤ ds ≤ 3. The results are compared with recent simulations of aggregation and growth as well as with a new analysis of spinodal decomposition, both predicting fractal morphologies.

Early stages of spinodal decomposition in an aluminum-zinc alloy

1967 ◽  
Vol 15 (6) ◽  
pp. 1025-1033 ◽  
Author(s):  
K.B Rundman ◽  
J.E Hilliard
Keyword(s):  
Spinodal Decomposition ◽  
Zinc Alloy ◽  
Early Stages

scholarly journals Early stages of spinodal decomposition in Fe–Cr resolved by in-situ small-angle neutron scattering

2015 ◽  
Vol 106 (6) ◽  
pp. 061911 ◽  
Author(s):  
M. Hörnqvist ◽  
M. Thuvander ◽  
A. Steuwer ◽  
S. King ◽  
J. Odqvist ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Spinodal Decomposition ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Early Stages

Early stages of spinodal decomposition for the Cahn-Hilliard-Cook model of phase separation

1988 ◽  
Vol 38 (7) ◽  
pp. 4725-4739 ◽  
Author(s):  
K. R. Elder ◽  
T. M. Rogers ◽  
Rashmi C. Desai
Keyword(s):  
Phase Separation ◽  
Spinodal Decomposition ◽  
Early Stages ◽  
Cook Model

Spherulitic crystal growth in the prodissoconch larval of Crassostrea virginica

1983 ◽  
Vol 41 ◽  
pp. 518-519
Author(s):  
George G. Cocks ◽  
Louis Leibovitz ◽  
DoSuk D. Lee
Keyword(s):  
Crystal Structure ◽  
Crassostrea Virginica ◽  
Crystal Orientation ◽  
Developmental Changes ◽  
Gastrula Stage ◽  
Orthorhombic Crystal ◽  
Orthorhombic Crystal Structure ◽  
Stages Of Growth ◽  
Early Stages ◽  
Initial Deposition

Our understanding of the structure and the formation of inorganic minerals in the bivalve shells has been considerably advanced by the use of electron microscope. However, very little is known about the ultrastructure of valves in the larval stage of the oysters. The present study examines the developmental changes which occur between the time of conception to the early stages of Dissoconch in the Crassostrea virginica(Gmelin), focusing on the initial deposition of inorganic crystals by the oysters.The spawning was induced by elevating the temperature of the seawater where the adult oysters were conditioned. The eggs and sperm were collected separately, then immediately mixed for the fertilizations to occur. Fertilized animals were kept in the incubator where various stages of development were stopped and observed. The detailed analysis of the early stages of growth showed that CaCO3 crystals(aragonite), with orthorhombic crystal structure, are deposited as early as gastrula stage(Figuresla-b). The next stage in development, the prodissoconch, revealed that the crystal orientation is in the form of spherulites.

Formation of Dislocation Channels in Neutron Irradiated Molybdenum

1972 ◽  
Vol 30 ◽  
pp. 672-673
Author(s):  
S. Mahajan
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Ambient Temperature ◽  
Room Temperature ◽  
Channel Formation ◽  
Early Stages ◽  
Transmission Electron ◽  
Three Stages ◽  
Two Stages ◽  
Polycrystalline Molybdenum

The evolution of dislocation channels in irradiated metals during deformation can be envisaged to occur in three stages: (i) formation of embryonic cluster free regions, (ii) growth of these regions into microscopically observable channels and (iii) termination of their growth due to the accumulation of dislocation damage. The first two stages are particularly intriguing, and we have attempted to follow the early stages of channel formation in polycrystalline molybdenum, irradiated to 5×1019 n. cm−2 (E > 1 Mev) at the reactor ambient temperature (∼ 60°C), using transmission electron microscopy. The irradiated samples were strained, at room temperature, up to the macroscopic yield point.Figure 1 illustrates the early stages of channel formation. The observations suggest that the cluster free regions, such as A, B and C, form in isolated packets, which could subsequently link-up to evolve a channel.

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