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The reaction equation for the reaction between water and silica reads ≡Si-O-Si≡ +H$_2$O ↔ [2 SiOH] For this reaction the equilibrium constant, k, is affected by internal swelling stresses. We investigated the behaviour of erfc-shaped distributi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::31a24effe3c53a57c44dabbd87a8e800
https://publikationen.bibliothek.kit.edu/1000156999
https://publikationen.bibliothek.kit.edu/1000156999
In the present Report, we will discuss the irregular water distributions at silica surfaces as were reported by the measured data from Zouine et al. [1], especially those at room temperature. The question was whether the deviations from the usually f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d890f0cb25eda35abbcbc539335da866
In previous reports on the mass transfer coefficient of quartz glass in water, we were able to determine that this is significantly larger in liquid water than in saturated water vapor as the surrounding medium. From literature results by Zouine et a
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https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7aaea88888d49d3b3ae25661bebf0916
The concentration of water penetrated into silica depends strongly on the stress state in the surface region. In the water diffusion zone hydroxyl water is generated by the water/silica reaction that is at temperatures
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::88f42de39fe8f708361df9d2380a9e83
https://publikationen.bibliothek.kit.edu/1000150433/149260924
https://publikationen.bibliothek.kit.edu/1000150433/149260924
The concentration of water penetrated into silica depends strongly on the stress state in the surface region. In the water diffusion zone hydroxyl water is generated by the water/silica reaction that is at temperatures
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f86cc21f03ea0a70bfd387d597084ac6
Autor:
Fett, Theo, Schell, Günter
Water diffusion at the surface of a silica glass is increased when surface cracks are present which were inadvertently introduced by the surface treatment of samples. Due to the larger true surface exposed to the humid environment, an apparently incr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b9958de277bac345dafb8a7d4be80b9
Autor:
Fett, Theo, Schell, Günter
Water diffusion into silica glass results in a thin zone near the surface of the glass. In this zone the water reacts with the SiO2 structure and “damages” the originally intact SiO2 rings. The consequence is a reduced Young’s module. This effe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::375b760818fc6f8996bcf4079a3dd4e8
https://publikationen.bibliothek.kit.edu/1000089939/21905440
https://publikationen.bibliothek.kit.edu/1000089939/21905440
Water reacting with silica causes the generation of hydroxyl SiOH accompanied by a volume or swelling expansion. The principle of LeChatelier ensures that the hydroxyl concentration increases with increasing externally applied stresses. From the anal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c4786eaacb660ded03a092cfdb888d26
https://publikationen.bibliothek.kit.edu/1000087721/19634355
https://publikationen.bibliothek.kit.edu/1000087721/19634355
Autor:
Fett, Theo, Schell, Günter
The deformation of water-affected silica fibers in 2-point-bending does not completely disappear after unloading. So far, this effect is discussed in literature as a stress relaxation at rather low temperatures. In the present study, we apply the swe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7db8a8073146246051980a0b01b9e8e2
Autor:
Schell, Günter, Rizzi, Gabriele, Hettich, Pascal, Zielonka, Paul, Wagner, Susanne, Fett, Theo
The main advantages of DCDC-specimens are the completely stable crack extension after spontaneous crack initiation due to the decreasing stress intensity factor with increasing crack length and a very high path stability due to the strongly negative
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f74247ed52c246af5fa7bc6f5bd4e44
https://publikationen.bibliothek.kit.edu/1000080046
https://publikationen.bibliothek.kit.edu/1000080046