Reactive melt infiltration fabrication of C/C-SiC composite: Wetting and infiltration |
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| Affiliation: | 1. National Engineering Research Center for Mechanical Product Remanufacturing, Academy of Armored Forces Engineering, Beijing, China;2. College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, China;3. Research School of Engineering, College of Engineering and Computer Science, Australian National University, ACT, Australia;4. School of Electronics and Information, Jiangsu University of Science and Technology, Zhenjiang, China;1. German Aerospace Center (DLR), Institute of Structures and Design, Pfaffenwaldring 38-40, Stuttgart 70569, Germany;3. Friedrich-Alexander Universitaet Erlangen-Nuerberg (FAU), Lehrstuhl Werkstoffkunde und Technologie der Metalle, Martensstr. 5, Erlangen 91058, Germany;1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;2. Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;3. Graduate University of Chinese Academy of Sciences, Beijing 100049, China;1. College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, PR China.;2. Research School of Engineering, College of Engineering and Computer Science, Australian National University, ACT, Australia;1. Science and Technology on Thermostructure Composite Materials Laboratory, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, China;2. School of Material Science and Engineering, South China University of Technology, Guangzhou 510630, China |
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| Abstract: | Reactive melt infiltration is a fast and economical fabrication process for high performance C/C-SiC composite. In order to help understanding reactive melt infiltration production of C/C-SiC composite by liquid silicon, wetting and infiltration of the porous C/C composite preform by liquid silicon were investigated using a sessile drop technique. The contact angle decreased with the increase of time while the drop base diameter increased. According to the variation of drop base diameter and contact angle as a function of time, four different stages corresponding to the interfacial reaction and infiltration of liquid silicon were identified during wetting of the porous C/C composite preform by the liquid silicon. The infiltration height based on wetting curve linearly increased with time, much smaller than that calculated according to Washburn equation, which strongly indicated the reaction control of silicon infiltration. |
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| Keywords: | Wetting Infiltration C/C composite preform Reactive melt infiltration Liquid silicon |
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