Reactive wetting and interfacial reaction mechanism of ZrC-SiC ceramic and Ag-Zr filler |
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| Affiliation: | 1. Key Laboratory of Pressure Systems and Safety, Ministry of Education, School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China;2. Joining and Welding Research Institute, Osaka University, Osaka, 567-0047, Japan;3. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China;1. CNR-ISTEC, National Research Council of Italy, Institute of Science and Technology for Ceramics, Via Granarolo, Faenza, RA, 64-48018, Italy;2. Institute of Structures and Design, German Aerospace Center, Stuttgart, Germany;1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China;2. AECC Shenyang Liming Aero-Engine Co., Ltd, Shenyang, 110043, China;3. Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150080, China;4. State Key Laboratory of Advanced Brazing Filler Metals and Technology, Zhengzhou Research Institute of Mechanical Engineering, Zhengzhou, 450001, China;5. Army Academy of Armored Forces, Changchun, 130117, China;1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China;2. Empa, Swiss Federal Laboratories for Materials Science and Technology, CH-8600 Dübendorf, Switzerland;3. Korea Institute of Industrial Technology, 30, Gwahaksandan 1-ro, 60beon-gil, Gangseo-gu, Busan 46742, Republic of Korea |
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| Abstract: | In this study, the isotherm wetting and spreading behaviors of molten Ag-Zr filler on ZrC-SiC ceramic surface was investigated using a sessile drop method in vacuum. The effect of Zr content in Ag-Zr filler on the wetting behavior was studied, and the wetting mechanism was revealed in details. The results showed that the contact angle of Ag-Zr filler on the ZrC-SiC surface decreased from 140 ° to 20 ° with the Zr content varied from 0 to 8 wt.%, and the Zr was the key factor to the wetting process. The wetting dynamic analysis illustrated that the interfacial reaction controlled the wetting of Ag-Zr filler on the ZrC-SiC surface. Due to the Zr activity difference at Ag-Zr/ZrC interface, the ZrC released C into Ag-Zr filler, and reacted with Zr to form new-born ZrC with higher Zr content. The formation of the new-born ZrC promoted wetting and spreading of Ag-Zr filler on ZrC-SiC surface. |
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| Keywords: | Wetting behavior Interfacial reaction Microstructure Wetting mechanism |
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