Paper number 952
|FABRICATION AND CHARACTERIZATION OF 3D CARBON-FIBER/SIC COMPOSITES BY SLURRY - PULSE CVI JOINT PROCESS|
K. Suzuki, K. Nakano and T.W. Chou
National Industrial Research Institute of Nagoya, Nagoya(Japan)
Japan Ultra-high Temperature Materials Research Institute, Tajimi(Japan)
Center for Composite Materials, University of Delaware, Newark DE(USA)
|Summary||For the sake of constructing a process for fabrication of small and medium scale CMCs parts, slurry-pulse CVI joint process has been trying to apply for making 3D carbon-fiber/SiC composites. The pulse CVI process was finally applied for a composite body made by a process consisting of slurry and polycarbosilane infiltrations and pyrolysis. The pulse CVI was carried out by using a source gas system of SiCl4-CH4-H2. Crystalline phases deposited by the pulse CVI varied with temperature, gas concentration and reaction time. At 1373K, a large amount of SiC deposition into matrix was observed, and the deposition rate was at least twice higher than that for CH3SiCl3-H2 system in the previous work. Model structure of composite after each process were proposed. Flexural strength of composite remarkably increased after the pulse CVI application.
||Keywords|| 3D carbon fiber, SiC matrix composite, slurry infiltration, Pulse CVI, Joint fabrication process.
Theme : Ceramic Matrix and C/C Composites
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