The Liquid Silicon Infiltration (LSI) process allows the joining of CMC parts during manufacturing, i.e. C/C-SiC joints can be produced in-situ. Porous C/C components are prepared and fixed together and molten silicon is caused to flow between the surfaces and react with the carbon material to convert it to silicon carbide and bond the surfaces together. Basic investigations have been carried out in terms of surface preparation, gap geometry, addition of paste, and its composition, and infiltration parameters. Lap joint specimens have been manufactured and tested with standardised geometry under compression. The mechanical and microscopical tests allowed the selection of an appropriate joining method which was transferred to real components. Thispaper deals with first results of this novel liquid phase bonding of CMC components.
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