High temperature tensile strength of ultrathin 3YSZ tapes : An experimental study combining Weibull theory and fracture mechanics

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00008854
URN to cite this document: urn:nbn:de:bvb:703-epub-8854-4

Title data

Bombarda, Ilaria ; Wich, Felix ; Langhof, Nico ; Sitzmann, Carolin ; Schafföner, Stefan:
High temperature tensile strength of ultrathin 3YSZ tapes : An experimental study combining Weibull theory and fracture mechanics.
In: International Journal of Hydrogen Energy. Vol. 164 (2025) . - 150764.
ISSN 0360-3199
DOI der Verlagsversion: https://doi.org/10.1016/j.ijhydene.2025.150764

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Project information

Project title:	Project's official title Project's id Hochtemperatur-Universalprüfgerät 428091604 Open Access Publizieren No information
Project financing:	Deutsche Forschungsgemeinschaft

Abstract

High temperature electrolysis (HTEL) has several advantages compared to other types of solid oxide cell (SOC) technologies, including an increased efficiency at high temperature when combined with an exothermic process. To reduce costs, increase lifetime and improve scale up production of electrolyte supported SOCs, an important property is the mechanical stability of the cell, which is provided by the ceramic electrolyte. In this work, the tensile mechanical properties of ultrathin (t = 90 μm) 3 yttria-stabilized zirconia electrolytes were measured at room and operating temperature (T = 850 °C). In-situ nanoindentation was also performed to study the 3YSZ local mechanical properties at room and high temperature. The calculated characteristic tensile strength and Weibull modulus allowed the evaluation of mechanical properties with improved reliability compared to the previously reported values in the literature, deriving from the substantially larger tested material volume. An extensive fracture analysis revealed porosity or particle inclusions at the fracture origin. The defect size and strength relation showed a deviation from linear elastic fracture mechanics, identifying the presence of subcritical crack growth.

Further data

Item Type:	Article in a journal
Keywords:	3YSZ; Tensile; SOC; High temperature; Ultrathin
DDC Subjects:	600 Technology, medicine, applied sciences > 620 Engineering
Institutions of the University:	Faculties > Faculty of Engineering Science > Chair Ceramic Materials > Chair Ceramic Materials - Univ.-Prof. Dr.-Ing. Stefan Schafföner Research Institutions > Affiliated Institutes > Fraunhofer Center for High Temperature Materials and Design (HTL) Faculties Faculties > Faculty of Engineering Science Faculties > Faculty of Engineering Science > Chair Ceramic Materials Research Institutions Research Institutions > Affiliated Institutes
Language:	English
Originates at UBT:	Yes
URN:	urn:nbn:de:bvb:703-epub-8854-4
Date Deposited:	05 Feb 2026 13:13
Last Modified:	05 Feb 2026 13:13
URI:	https://epub.uni-bayreuth.de/id/eprint/8854

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