Emission Mössbauer spectroscopy of grain boundaries in polycrystalline molybdenum

Emission Mössbauer spectroscopy of grain boundaries in polycrystalline molybdenum

Grain boundaries in polycrystalline molybdenum have been studied by emission Mössbauer spectroscopy on 57 Co ( 57 Fe) nuclei. It has been shown that Co atoms diffuse along the grain boundaries by the interstitial mechanism. The states of Co atoms in grain boundaries and in near-boundary regions of t...

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Veröffentlicht in:Physics of metals and metallography 2015-04, Vol.116 (4), p.378-384
Hauptverfasser: Popov, V. V., Sergeev, A. V.
Format: Artikel
Sprache:eng
Schlagworte:
Analysis
Annealing
Chemistry and Materials Science
Cobalt
Crystallites
Diffusion
Diffusion coefficient
Emission spectroscopy
Grain boundaries
Materials Science
Metallic Materials
Molybdenum
Mossbauer spectroscopy
Phase Transformations
Segregations
Spectrum analysis
Structure
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Zusammenfassung:Grain boundaries in polycrystalline molybdenum have been studied by emission Mössbauer spectroscopy on 57 Co ( 57 Fe) nuclei. It has been shown that Co atoms diffuse along the grain boundaries by the interstitial mechanism. The states of Co atoms in grain boundaries and in near-boundary regions of the crystallites have been analyzed. The values of the effective diffusion coefficient in the subboundary regions of the crystallites have been estimated. The temperature dependence of the grain-boundary segregation factor of Co in Mo has been determined.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X15040134