Sealing behaviour of glass-based composites for oxygen transport membranes |
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| Affiliation: | 1. Central Institute of Engineering, Electronics and Analytics – and Engineering and Technology (ZEA-1), Forschungszentrum Jülich GmbH, Jülich, Germany;2. Institute of Energy and Climate Research – Materials Synthesis and Processing (IEK-1), Forschungszentrum Jülich GmbH, Jülich, Germany;3. Faculty of Mechanical Engineering, RWTH Aachen University, Aachen, Germany;1. Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Beijing Information Science & Technology University, Beijing 100083, China;2. Beijing Institute of Aeronautical Materials, Aero Engine Corporation of China, Beijing 100095, China;3. AECC Sichuan Gas Turbine Establishment, Mianyang 621000, China;4. Research Institute Aero-Engine, Beihang University, 100190, China;1. Giant Dielectric and Computational Design Research Group (GD–CDR), Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand;2. Synchrotron Light Research Institute (Public Organization), 111 University Avenue, Muang District, Nakhon Ratchasima 30000, Thailand;1. School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd, Shanghai 200240, China;2. Shanghai Key Laboratory of Advanced High-Temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd, Shanghai 200240, China;3. Department of Electronic Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd, Shanghai 200240, China;1. School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China;2. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China;3. Dongyang Firstmagnet Company Limited, Dongyang 322105, China;1. State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China;2. Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110169, Liaoning, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;4. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110169, Liaoning, China;5. School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, Liaoning, China |
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| Abstract: | In this study, seven different filler materials in different proportions were added to a Ba-Ca-Si glass matrix “H” to investigate new sealant with higher thermal expansion coefficient (CTE) value and good sealing performance for application in oxygen transport membrane (OTM). SrTi0.75Fe0.25O3-δ (STF25) was used as an OTM, and the sealing partners were ferritic steel Aluchrom and pre-oxidized Aluchrom. Compatibility tests were carried out to investigate the feasibility of the composites. Higher CTE values were found in dilatometer tests on composite samples by adding 40 wt% Ag (HAg40) and 30 wt% Ni-Cr (HNC30). Gas-tightness measurements of sandwiched samples produced appropriate helium leakage rates in the range of 10?6 mbar·l·s?1. Sealing behaviour of sealants HAg40 and HNC30 were investigated by joining STF25 and as-delivered/pre-oxidized Aluchrom together. Scanning electron microscopy (SEM) on cross-sections of the joints revealed a homogeneous microstructure and good adherence of the glass sealants to support metals and STF25. |
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| Keywords: | Composite sealants Fillers CTE Sealing behaviour OTM |
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