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