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doi:10.22028/D291-24615
Titel: | Enhancement of fracture strength of cutted plate glass by the application of SiO2 sol-gel coatings |
VerfasserIn: | Endres, Klaus Mennig, Martin Amlung, Martin Gier, Andreas Schmidt, Helmut K. |
Sprache: | Englisch |
Erscheinungsjahr: | 1999 |
Quelle: | Thin solid films. - 351. 1999, 1/2, S. 132-136 |
Kontrollierte Schlagwörter: | Glas Biegefestigkeit Sol-Gel-Verfahren Rasterelektronenmikroskop Kalknatronglas Tetraethylsilicat <Tetraethylorthosilicat> |
DDC-Sachgruppe: | 620 Ingenieurwissenschaften und Maschinenbau |
Dokumenttyp: | Journalartikel / Zeitschriftenartikel |
Abstract: | The influence of SiO2 sol-gel coatings on the bending strength of soda lime plate glass samples has been investigated by 3 point bending and double ring bending strength measurements. The samples were prepared by manual glass cutting and were coated with two different types of SiO2 coating: A TEOS coating (thickness of about 100 nm) was obtained from sols synthesized by acid catalysis of tetraethoxysilane and a MTKS coating (thickness of about 1 µm) was obtained from a methyl modified nanoparticulate SiO2 sol. The coatings were applied by dipping and were densified at 500'°C for 1 h. The fracture strength σ0 of edge coated plate glass (60 x 25 x 3.8 mm), determined by 3 point bending test (according to EN 843-1), was increased after coating with TEOS from σ0 = 24 MPa to 40 MPa (67% increase). The fracture strength increased to σ0 = 56 MPa (133% increase) on applying MTKS or a double coating of TEOS followed by MTKS. The evaluation of these measurements using Weibull statistical analysis resulted in m values of 4.1 and 4.2 for the TEOS and MTKS coating and 3.5 for double coating (uncoated glasses m = 5.7), respectively. These results combined with high resolution secondary electron microscopy investigations led to the conclusion that the strengthening effect of the two different sol-gel systems is due to a partial flaw healing and clamping of the crack sides. |
Link zu diesem Datensatz: | urn:nbn:de:bsz:291-scidok-29234 hdl:20.500.11880/24671 http://dx.doi.org/10.22028/D291-24615 |
Datum des Eintrags: | 5-Jul-2010 |
Fakultät: | SE - Sonstige Einrichtungen |
Fachrichtung: | SE - INM Leibniz-Institut für Neue Materialien |
Sammlung: | INM SciDok - Der Wissenschaftsserver der Universität des Saarlandes |
Dateien zu diesem Datensatz:
Datei | Beschreibung | Größe | Format | |
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sm199906.pdf | 504,35 kB | Adobe PDF | Öffnen/Anzeigen |
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