Pulsed current-driven wetting of 3YSZ by liquid Cu and its mechanisms |
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| Affiliation: | 1. State Key Laboratory of Automotive Simulation and Control, Jilin University, PR China;2. Key Laboratory of Automobile Materials (Ministry of Education), School of Materials Science and Engineering, Jilin University, No. 5988 Renmin Street, Changchun, 130022, PR China;1. Materials Engineering Department, Tarbiat Modares University, Tehran, Iran;2. Department of Electrical Engineering and Computer Science & Research Center MANSID, Stefan Cel Mare University, Suceava, Romania;1. Bayreuth Engine Research Center (BERC), Department of Functional Materials, University of Bayreuth, 95440 Bayreuth, Germany;2. Institute of Energy Research and Physical Technologies, Clausthal University of Technology, 38640 Goslar, Germany;1. CEA Tech Nouvelle Aquitaine, C?ur Bersol Bâtiment B, 28 Avenue Gustave Eiffel, 33600 Pessac, France;2. Center for Technology Transfers in Ceramics, Parc Ester Technopole, 7 rue Soyouz, 87068 Limoges, France;3. Univ. Bordeaux, CNRS, LOMA, UMR 5798, F-33400 Talence, France;1. Universität Stuttgart, Institute of Ceramics and Composites IFKB, Allmandring 7B, D-70569 Stuttgart, Germany;2. Universität Stuttgart, Institute for Materials Science IMW, Heisenbergstraße 3, D-70569 Stuttgart, Germany |
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| Abstract: | The wettability of 3 mol% Y2O3-stabilized ZrO2 (3YSZ) by molten Cu can be greatly improved by applying pulsed currents at 1373 K. The improvement was closely related to current polarity and influenced by duty cycle and frequency. When the Cu/3YSZ interface was under cathodic condition, the wettability was mainly improved by the formation of substoichiometric ZrO2-δ and metallic Zr at the interface. Increasing duty cycle caused the interface to change from forming protrusions to creating depression. Decreasing frequency further deepened the depression. In the opposite polarity, the adsorption and enrichment of oxygen reduced the solid-liquid and liquid-vacuum interfacial energies, thus improving the wettability. Only bubbles formed at the interface. The larger the duty cycle, the more rapidly bubbles formed and escaped. The effect of frequency at this polarity was weak. Overall, this work provides a novel and effective strategy for tailoring the wettability and interfacial chemistry between zirconia and metals. |
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| Keywords: | Wetting YSZ Interface Pulsed current |
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