[en] This paper reports the ability to use a commercial poIysilazane as matrix precursor for the manufacture of ceramic matrix composites. By pyrolysis under nitrogen in the temperature range IOOO-1400°C this polysilazane leads to an amorphous silicon carbonitride with a ceramic yield
around 65 wt%. The rheological behaviour and the thermal decomposition of the polysilazane have been studied. Parameters for the impregnation and pyrolysis cycles
required by the manufacture of composites are also proposed.
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