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

Hornqvist, M.; Thuvander, M.; Steuwer, Axel LU ; King, S.; Odqvist, J. and Hedstrom, P. (2015) In Applied Physics Letters 106(6).
Abstract
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' = 0.10-0.11 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... (More)
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' = 0.10-0.11 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). (C) 2015 AIP Publishing LLC. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
in
Applied Physics Letters
volume
106
issue
6
publisher
American Institute of Physics
external identifiers
  • wos:000349845300030
  • scopus:84923917089
ISSN
0003-6951
DOI
10.1063/1.4908250
language
English
LU publication?
yes
id
48c041d4-b82c-47b9-bf99-a62a36b0a5f5 (old id 5305197)
date added to LUP
2015-04-27 11:48:44
date last changed
2017-06-25 03:11:41
@article{48c041d4-b82c-47b9-bf99-a62a36b0a5f5,
  abstract     = {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' = 0.10-0.11 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). (C) 2015 AIP Publishing LLC.},
  articleno    = {061911},
  author       = {Hornqvist, M. and Thuvander, M. and Steuwer, Axel and King, S. and Odqvist, J. and Hedstrom, P.},
  issn         = {0003-6951},
  language     = {eng},
  number       = {6},
  publisher    = {American Institute of Physics},
  series       = {Applied Physics Letters},
  title        = {Early stages of spinodal decomposition in Fe-Cr resolved by in-situ small-angle neutron scattering},
  url          = {http://dx.doi.org/10.1063/1.4908250},
  volume       = {106},
  year         = {2015},
}