ECN publication
Mechanical testing of adherence of stacked layers in tubular geometry
Published by: Publication date:
ECN Energy Efficiency in Industry 27-9-2007
ECN report number: Document type:
ECN-M--07-108 Conference Paper
Number of pages: Full text:
11 Download PDF  

Presented at: Second International Symposium on Advanced Micro- and Mesoporous Materials, Varna, Bulgaria, 6-9 september 2007.

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.

Back to List