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

Magnus Hörnqvist (Institutionen för teknisk fysik, Materialens mikrostruktur ) ; Mattias Thuvander (Institutionen för teknisk fysik, Materialens mikrostruktur ) ; Axel Steuwer ; Stephen King ; Joakim Odqvist ; Peter Hedström
Applied Physics Letters (0003-6951). Vol. 106 (2015), 6, p. 061911.
[Artikel, refereegranskad vetenskaplig]

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).

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Denna post skapades 2015-02-17. Senast ändrad 2015-06-12.
CPL Pubid: 212753


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Institutioner (Chalmers)

Institutionen för teknisk fysik, Materialens mikrostruktur (2012-2015)


Defekter och diffusion
Teknisk fysik
Materialfysik med ytfysik

Chalmers infrastruktur