Early stages of spinodal decomposition in Fe–Cr resolved by in-situ small-angle neutron scattering
Journal article, 2015

In-situ, time-resolved small-angle neutron scattering (SANS) investigations of the early stages of the spinodal decomposition process in Fe–35Cr were performed at 773 and 798K. The kinetics of the decomposition, both in terms of characteristic distance and peak intensity, followed a power-law behaviour from the start of the heat treatment (a'=.10–0.11 and a''=0.67–0.86). Furthermore, the method allows tracking of the high–Q slope, which is a sensitive measure of the early stages of decomposition. Ex-situ SANS and atom probe tomography were used to verify the results from the in-situ investigations. Finally, the in-situ measurement of the evolution of the characteristic distance at 773K was compared with the predictions from the Cahn-Hilliard-Cook model, which showed good agreement with the experimental data (a'=0.12–0.20 depending on the assumed mobility).


Magnus Hörnqvist

Chalmers, Applied Physics, Materials Microstructure

Mattias Thuvander

Chalmers, Applied Physics, Materials Microstructure

Axel Steuwer

Nelson Mandela University

Lund University

Stephen King

ISIS Facility

J. Odqvist

Royal Institute of Technology (KTH)

P. Hedstrom

Royal Institute of Technology (KTH)

Applied Physics Letters

0003-6951 (ISSN) 1077-3118 (eISSN)

Vol. 106 6 061911- 061911

Subject Categories

Materials Engineering

Other Engineering and Technologies

Other Engineering and Technologies not elsewhere specified

Condensed Matter Physics

Areas of Advance

Materials Science



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