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DOI: 10.5445/IR/1000080284
Veröffentlicht am 14.02.2018

Hydroxyl concentrations on crack surfaces from measurements by Tomozawa, Han and Lanford

Schell, Günter; Rizzi, Gabriele; Fett, Theo

Abstract:
The effect of stress-enhanced hydroxyl concentration in silica penetrated by water could be proved by using hydrogen measurements from literature (Tomozawa, Han and Lanford 1991). The concentration of water penetrated into silica during a subcritical crack growth test is strongly larger than the water diffused into unstressed silica surfaces. From this result it could be concluded that the equilibrium constant of the water-silica reaction is strongly enhanced due to the near-tip tensile stresses of cracks and that the reaction volume change is positive.


Zugehörige Institution(en) am KIT Fakultät für Maschinenbau (MACH)
Institut für Angewandte Materialien - Keramische Werkstoffe und Technologien (IAM-KWT)
Publikationstyp Forschungsbericht
Jahr 2018
Sprache Englisch
Identifikator ISSN: 2194-1629
URN: urn:nbn:de:swb:90-802846
KITopen-ID: 1000080284
Verlag KIT, Karlsruhe
Umfang VI, 11 S.
Serie KIT Scientific Working Papers ; 82
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