Manufacturing of ceramic matrix composite using a hybrid process combining TiSi2 active filler infiltration and preceramic impregnation and pyrolysis |
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| Affiliation: | 1. International Advanced Research and Education Organization, Tohoku University, Sendai 980-8578, Japan;2. Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan;1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China;2. University of Chinese Academy of Sciences, Beijing 100039, PR China;1. National University of Science and Technology “MISIS”, SHS Research & Education Center MISIS-ISMAN, Leninsky Prospect, 4, Moscow 119049, Russia;2. Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, ul. Academica Osipyana, 8, Chernogolovka, Moscow Region 142432, Russia |
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| Abstract: | The manufacturing of silicon carbide reinforced ceramic matrix composites by a hybrid process is explored. Fibre preforms are infiltrated with TiSi2 powders using the slurry method. Using TiSi2 active filler leads to reduce the porosity by the subsequent formation of nitride phases after treatment under N2 atmosphere at low temperatures (≤1100 °C). Taking into account the influence of the specific surface area of the powder on the nitridation rate, it is shown that it is possible to produce nitrides TiN and Si3N4 at 1100 °C with an interesting volume expansion inside the composite. To complete the densification of the composite, a polymer impregnation and pyrolysis (PIP) process are performed with a liquid polymeric precursor. Characterizations of the composites show that mechanical properties are improved with the presence of the TiN and Si3N4 phases, and the number of PIP cycles. |
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| Keywords: | CMC Active filler Slurry impregnation Flexural strength Nitridation |
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