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Slow crack groth as a function of relative density for vitreous silica
Luleå tekniska universitet.
1995 (English)In: Ceramics : charting the future: Symposium : 8th World ceramics congress and Forum on new materials : Papers / [ed] P. Vincenzini, TECHNA Srl , 1995Conference paper, Published paper (Refereed)
Abstract [en]

Crack velocities as a function of KI were studied for gel-derived vitreous silica sintered from relative densities of 0.23 to full density. The gels were formed by mixtures of colloidal silica, potassium soluble silicate and formamide. Slow crack growth was studied by the constant moment double cantilever beam test. Data were analysed in terms of the log v-K plots and the equation v = (v0/A1)exp(-E*+bA2KI)/RT. Experiments showed that porosity had a major effect on the slope of these plots but only a minor effect on the log intercept. The change in log intercept was considered in terms of the pre-exponential A1, the change in slope by the term A2. A2 varied from a value of 1 at full density to a value of 6.71 at 0.23 relative density

Place, publisher, year, edition, pages
TECHNA Srl , 1995.
Series
Advances in Science and Technology
National Category
Other Materials Engineering
Research subject
Engineering Materials
Identifiers
URN: urn:nbn:se:ltu:diva-30853Local ID: 4d574f90-b57d-11dd-a6f7-000ea68e967bISBN: 8886538022 (print)OAI: oai:DiVA.org:ltu-30853DiVA, id: diva2:1004082
Conference
Ceramics : 28/06/1995 - 04/07/1995
Note
Godkänd; 1995; 20081118 (andbra)Available from: 2016-09-30 Created: 2016-09-30Bibliographically approved

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