Kinetic analysis of spinodal decomposition process in Fe–Cr alloys by small angle neutron scattering

2000 ◽  
Vol 48 (7) ◽  
pp. 1629-1637 ◽  
Author(s):  
T. Ujihara ◽  
K. Osamura
Keyword(s):  
Neutron Scattering ◽  
Kinetic Analysis ◽  
Spinodal Decomposition ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Decomposition Process

Spinodal decomposition in Fe-Cr alloys studied by small angle neutron scattering

Physica B+C ◽  
1983 ◽  
Vol 120 (1-3) ◽  
pp. 383-386 ◽  
Author(s):  
M. Furusaka ◽  
Y. Ishikawa ◽  
S. Yamaguchi ◽  
Y. Fujino
Keyword(s):  
Neutron Scattering ◽  
Spinodal Decomposition ◽  
Small Angle ◽  
Small Angle Neutron Scattering

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.

Studies on the Excess Free Energy and The Early Spinodal Decomposition of the Blend d-PS/Peavrmley Asntda tteh Eof Isotopic Blend d-PS/PS with Small Angle Neutron Scattering

1989 ◽  
Vol 171 ◽  
Author(s):  
D. Schwahn ◽  
T. Springer ◽  
K. Hahn ◽  
J. Streib
Keyword(s):  
Phase Diagram ◽  
Free Energy ◽  
Neutron Scattering ◽  
Spinodal Decomposition ◽  
Temperature Region ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Excess Free Energy ◽  
Relaxation Rates ◽  
Early States

The article deals with the phase diagram and spinodal decomposition of two polymers blends, namely d—PS/PVME and d(deutero)—PS/PS, investigated by small angle neutron scattering (SANS). The result of the static experiments is the excess free energy and the phase diagram. This is used as a basis for studies of non—equilibrium phenomena as spinodal decomposition. In polymer blends the Cahn—Hilliard—Cook theory of the early state of spinodal decomposition can be tested easily, because the blends have rather low relaxation rates; and they are meanfield systems [2,6] which makes interpretation simple, except in a very narrow temperature region near the critical point [6]. The kinetics in the isotopic blend d—PS/PS are so slow that the early states of spinodal decomposition can be studied within minutes. The presented SANS results have been performed at the KWS I small angle instrument at the FRJ—2 reactor in the KFA Jülich.

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
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