Conference Paper
Determining the temperature dependent fracture toughness of carbon-bonded alumina using chevron-notched specimens
Authors:
H. Zielke ,
Institute for Mechanics and Fluid Dynamics, TU Bergakademie Freiberg, Germany
M. Abendroth,
Institute for Mechanics and Fluid Dynamics, TU Bergakademie Freiberg, Germany
M. Kuna
Institute for Mechanics and Fluid Dynamics, TU Bergakademie Freiberg, Germany
Abstract
Open cell ceramic foam filters are used for metal melt filtration. The aim is to reduce the number of non-metallic inclusions and therefore to enhance the quality of the cast product. A new generation of multifunctional filters, which is investigated within the collaborative research center CRC920, is made of fine grained carbon-bonded alumina. The filter manufacturing process leads to hollow struts with sharp edge cavities, which could act as a crack tip. To evaluate the integrity of the filter, a fracture mechanical characterization of the bulk material at different temperatures is necessary. In the applied chevron-notched beam method (CNB) the small specimens (5 x 6 x 25 mm3) are loaded with a four-point bending test set-up until failure occurs. The test set-up offers the possibility of testing at temperatures up to 1000°C. With the help of the measured load-displacement curve the fracture toughness is calculated. Additionally, an analysis of the microstructure of the fracture surface of the specimens is presented.
How to Cite:
Zielke, H., Abendroth, M. and Kuna, M., 2018. Determining the temperature dependent fracture toughness of carbon-bonded alumina using chevron-notched specimens. Ubiquity Proceedings, 1(S1), p.48. DOI: http://doi.org/10.5334/uproc.48
Published on
10 Sep 2018.
Peer Reviewed
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