Details
| Original language | English |
|---|---|
| Pages (from-to) | 707-723 |
| Number of pages | 17 |
| Journal | Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties |
| Volume | 61 |
| Issue number | 5 |
| Publication status | Published - May 1990 |
Abstract
Vacancy relaxation phenomena during interdiffusion of FeO and MnO have been studied on the basis of very accurate concentration-distance profiles of the cations, measured by X-ray microanalysis. The profiles clearly depended on annealing time and form of the samples. This observation directly demonstrates that local thermodynamic equilibrium of defects is not established in the reacting system. In addition, the deviation from local equilibrium is most pronounced at the early stage of the reaction in a thick sample. This can be explained by the long relaxation time the cation vacancies need to reach a free surface surrounded by oxygen gas as a vacancy sink.
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Physics and Astronomy(all)
- Physics and Astronomy (miscellaneous)
- Materials Science(all)
- Metals and Alloys
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In: Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties, Vol. 61, No. 5, 05.1990, p. 707-723.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Interdiffusion in oxides (A, B)O (II)
T2 - Experimental investigation of point-defect relaxation on concentration profiles for MnO-FeO
AU - Ueshima, Y.
AU - Schmalzried, H.
AU - Koepke, J.
N1 - Funding Information: One of us (Y. Ueshima) would like to thank the Alexander von Humboldt-Stiftung for a fellowship. We are indebted to the Deutsche Forschungsgemeinschaft for financial support. Mrs I. Lippert was helpful in performing the experiments.
PY - 1990/5
Y1 - 1990/5
N2 - Vacancy relaxation phenomena during interdiffusion of FeO and MnO have been studied on the basis of very accurate concentration-distance profiles of the cations, measured by X-ray microanalysis. The profiles clearly depended on annealing time and form of the samples. This observation directly demonstrates that local thermodynamic equilibrium of defects is not established in the reacting system. In addition, the deviation from local equilibrium is most pronounced at the early stage of the reaction in a thick sample. This can be explained by the long relaxation time the cation vacancies need to reach a free surface surrounded by oxygen gas as a vacancy sink.
AB - Vacancy relaxation phenomena during interdiffusion of FeO and MnO have been studied on the basis of very accurate concentration-distance profiles of the cations, measured by X-ray microanalysis. The profiles clearly depended on annealing time and form of the samples. This observation directly demonstrates that local thermodynamic equilibrium of defects is not established in the reacting system. In addition, the deviation from local equilibrium is most pronounced at the early stage of the reaction in a thick sample. This can be explained by the long relaxation time the cation vacancies need to reach a free surface surrounded by oxygen gas as a vacancy sink.
UR - http://www.scopus.com/inward/record.url?scp=0025431743&partnerID=8YFLogxK
U2 - 10.1080/01418619008231943
DO - 10.1080/01418619008231943
M3 - Article
AN - SCOPUS:0025431743
VL - 61
SP - 707
EP - 723
JO - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
JF - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
SN - 0141-8610
IS - 5
ER -