On the thermodynamic theory of the strength of solids: 4. Capillary condensation and capillary evaporation in wedge-shaped crack

The processes of capillary condensation and capillary evaporation in a wedge-shaped crack are considered. Capillary evaporation is a comparatively new phenomenon that is opposite to capillary condensation and occurs upon the cleavage of a solid in a nonwetting liquid. For both cases, the positions o...

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Bibliographic Details
Published inColloid journal of the Russian Academy of Sciences Vol. 76; no. 2; pp. 176 - 181
Main Author Rusanov, A. I.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.03.2014
Subjects
Chemistry
Chemistry and Materials Science
Polymer Sciences
Surfaces and Interfaces
Thin Films
Crack Mouth
Thermodynamic Theory
Colloid Journal
Capillary Condensation
Contact Angle
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Summary:The processes of capillary condensation and capillary evaporation in a wedge-shaped crack are considered. Capillary evaporation is a comparatively new phenomenon that is opposite to capillary condensation and occurs upon the cleavage of a solid in a nonwetting liquid. For both cases, the positions of a meniscus inside a wedge-shaped crack have been calculated as functions of the meniscus curvature radius, liquid-contact angle, and crack-opening angle. The effect of temperature on the meniscus position has been analyzed; it has been established that the meniscus shifts from the gaseous toward the liquid phase as temperature rises. The regularities of meniscus displacements in the course of crack growth have been established: under the conformal mechanism of crack growth, the absolute position of the meniscus remains unchanged (i.e., the meniscus and the crack frontal line move at the same velocity), while, under the depth mechanism of growth, the relative position of the meniscus is retained.
ISSN:1061-933X
1608-3067
DOI:10.1134/S1061933X14010104