Glass - Back to the Future!

Presenting Author:
Ralf Müller

article posted 20 June 2016

Ralf Müller is head of Glass division at the Federal Institute for Materials Research and Testing (BAM) in Berlin. His main research areas ar e crystallization and sintering of glass powders. He is a member of TC07 and coordinates the DGG-DKG joint working committee Glassy-Crystalline Multifunctional Materials.

High-Temperature Laser Profilometry

U. Marzok1, R. Müller*1, R. Reetz2, M. Trunkhardt3
1Bundesanstalt für Materialforschung und –prüfung (BAM), Berlin, Germany
2HTM Reetz GmbH, Berlin, Germany
3nokra Optische Prüftechnik und Automation GmbH, Baesweiler, Germany

Advanced methods for 3D green density characterization like computed tomography and 3D FE sinter modeling can be utilized for increasing the reliability of sintered components. The experimental in situ observation of sintering, however, is currently restricted to silhouette methods, i.e. heating microscopy. For complex shaped samples, in situ shape screening during shrinkage would allow much better validation of 3D sinter simulation models. Further, by revealing temporary sinter warpage, 3D high-temperature shape screening allows to locate potential defects of complex sintered components. Against this background, BAM developed a testing device for in situ 3D high-temperature shape screening for ceramic and glass-ceramic tapes up to 1000°C [1-3]. Current work is focused on dropping this restriction in sample shape and temperature. The poster illustrates the current state of this work and possible applications of the method e.g. in detecting sinter warpage of metallized glass-ceramic LTCC tapes.

[1] U.Marzok, R.Müller, R. Schadrack, M. Krauhausen, F.Burgsted, W.Brode, R. Reetz: High-Temperature Laser Profilometry for Ceramic Tapes cfi/Ber. DKG 90 (2013) No. 4
[2] U. Marzok, R. Müller, R. Schadrack, M. Krauhausen: US9074870B2, 07.07.2015
[3] U. Marzok, R. Müller, R. Schadrack, M. Krauhausen: EP2283308 B1, 16.12.2015