Wetting and spreading of molten NaCl and CaCl2 over polycrystalline hydroxyapatite

Wetting and spreading of molten NaCl and CaCl2 over polycrystalline hydroxyapatite

The contact angles of molten NaCl and CaCl2 on hydroxyapatite (HAp) in air at 866 and 880°C are close to zero. Wettability and the kinetics of spreading in the NaCl/HAp system were not affected by the reaction product presaturation of a melt or by substrate density and roughness; the rate of spreadi...

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Veröffentlicht in:Mendeleev communications 2014-01, Vol.24 (1), p.12-14
Hauptverfasser: Gusev, Sergey A., Shekhirev, Mikhail A., Safronova, Tatyana V., Putlayev, Valerii I., Skvortsova, Zoya N., Protsenko, Pavel V.
Format: Artikel
Sprache:eng
Schlagworte:
Contact
Density
Genes
Hydroxyapatite
Interface reactions
Mathematical models
Melts
Spreading
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Zusammenfassung:The contact angles of molten NaCl and CaCl2 on hydroxyapatite (HAp) in air at 866 and 880°C are close to zero. Wettability and the kinetics of spreading in the NaCl/HAp system were not affected by the reaction product presaturation of a melt or by substrate density and roughness; the rate of spreading for NaCl/HAp was described by the De Genes model of viscous dissipation, while it slowed down significantly in case of CaCl2/HAp due to the interfacial reaction resulting in a surface tension gradient.
ISSN:0959-9436
DOI:10.1016/j.mencom.2013.12.003