Mechanical testing of adherence of stacked layers in tubular geometry
conference paper
For the development of new molecular separation technologies strong robust tubular membrane systems are required. The fragile membranes, however, need a strong defect free support such as a porous asymmetric ceramic tube. Mechanical failure of these ceramic membrane systems during manufacturing and operation is mainly caused by delamination of the stacked layers. Therefore development is focused on improving the adherence. As no standard mechanical test for tubular samples is available yet, a new tensile test was developed to facilitate the current research. The most important components in the new equipment is a test tool with a curvature matching that of the test sample and a sample casing that align and guide the test tool during the tensile test. With this tensile test the manufacturing procedure for the ECN standard tubular ?-alumina support was optimized. Firing the asymmetric support at 1300°C resulted in the highest mechanical strength for the support system with cohesive fracture in the support tube. With the test developed the process condition could be identified where the material of the support tube is the weakest link in the support system.
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TNO Identifier
821410
Publisher
ECN
Source title
Second International Symposium on Advanced Micro- and Mesoporous Materials, Varna, Bulgaria, 6-9 september 2007.
Collation
11 p.
Place of publication
Petten
Pages
11 p.
Files