Triple point in spatially limited systems: Small particles and pores

A general thermodynamic approach is presented towards a triple point shift in arbitrary spatially limited systems with a curvilinear interface, including interfacial phases, small particles, and matter in pores. The suggested approach is based on using the coupling equations for vapor pressure over...

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Bibliographic Details
Published in:Protection of metals and physical chemistry of surfaces 2010-07, Vol.46 (4), p.403-410
Main Authors: Boinovich, L. B., Emel’yanenko, A. M.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Corrosion and Coatings
Crystals
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Materials Science
Mathematical analysis
Melts
Metallic Materials
Nanoparticles
Phases
Physical chemistry
Physicochemical Processes at the Interfaces
Porosity
Shells
Tribology
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Summary:A general thermodynamic approach is presented towards a triple point shift in arbitrary spatially limited systems with a curvilinear interface, including interfacial phases, small particles, and matter in pores. The suggested approach is based on using the coupling equations for vapor pressure over the bulk and spatially limited media together with the Clausius-Clapeyron relationships, and allows one to explain the effect of different physical-chemical parameters on the value and sign of the shift in the phase transition temperature. Besides, an explanation was offered within the developed theory for the difference in the melting points of different crystal faces, the presence of a nanometer melt layer for the substance in fine pores, and the formation of premolten or presolidified shell about nanoparticles.
ISSN:2070-2051
2070-206X
DOI:10.1134/S2070205110040027