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Torsional shear strength behavior of advanced glass-ceramic sealants for SOFC/SOEC applications
Affiliation:1. Politecnico di Torino, Department of Applied Science and Technology – DISAT, Institute of Materials Physics and Engineering, 10129, Torino, Italy;2. Sunfire GmbH, Gasanstaltstraße 2, 01237, Dresden, Germany;3. Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, IEK-2, 52425, Jülich, Germany;1. Universidade de São Paulo, Instituto de Física, Departamento de Física Geral, Rua do Matão, 1371 Cidade Universitária-Butantã, 05508-090 São Paulo, SP, Brazil;2. Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain;3. Faculty of Electronics, Telecommunications and Informatics, Gdansk University of Technology, ul. Narutowicza 11/12, 80-233 Gdańsk, Poland;4. Faculty of Applied Physics and Mathematics, Gdansk University of Technology, ul. Narutowicza 11/12, 80-233 Gdańsk, Poland;5. Missouri University of Science and Technology, Missouri S&T, Department of Material Science & Engineering, MO 65409, USA;1. Department of Materials Science and Engineering, Sharif University of Technology, Azadi Avenue, P. O. Box 11155-9466, Tehran, Iran;2. Forschungszentrum Jülich GmbH, Central Institute of Engineering, Electronics and Analytic, ZEA-1, 52425 Jülich, Germany;3. Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, IEK-2, 52425 Jülich, Germany;1. Baba Banda Singh Bahadur Engineering College, Fatehgarh Sahib, 140406, India;2. School of Physics and Materials Science, Thapar University, Patiala, 147001, India;3. Shri Guru Granth Sahib World University, Fatehgarh Sahib, 140406, India
Abstract:Since reliable long term operation of SOFC and SOEC devices depends critically on the mechanical behavior of the sealant material, the current work focuses on the characterization of the shear strength by a torsion test of two different glass-ceramic sealants that are used to join Crofer22APU substrates in an application relevant configuration. The two glass-ceramic sealants differ in terms of characteristic temperatures and crystalline phases with possible impications on the joining behavior. Statistically identical shear stress values were measured at room temperature for joined hourglasses of different size with both sealants, thus confirming a size independence of the measured strength values. Experimental post-test examination results confirm that the interfaces play a strong role regarding the measured shear strength and provide important insights with respect to integration of metallic and glass-ceramic components in SOFC/SOEC stacks.
Keywords:Torsion  SOFC  SOEC  Glass-ceramics  Sealants  Microstructure  Mechanical properties
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