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This paper reports the fabrication of a long carbon fibre reinforced silicon nitride matrix composite by liquid infiltration of an aqueous Si(3)N(4) slurry followed by hot-pressing. Fabrication of the ceramic matrix composites presents the great difficulty of filling the interfibre space with the matrix phase. Three variables of particular importance in the liquid infiltration described in this work are the particle size distribution of the starting powder, the state of particle dispersion in suspension and the deposition of particles through the fibre preform. Rheological measurements were used to evaluate the state of particulate dispersion in suspension, and pressure filtration was used to consolidate the infiltrated preforms. Finally full densification was achieved by hot-pressing below 1750 C under 27 MPa pressure. The paper also discusses the mechanical properties of the resulting composite.

Additional information

Authors: GRENET C, JRC Petten (NL);PLUNKETT L, JRC Petten (NL);VEYRET J B, JRC Petten (NL);BULLOCK E, JRC Petten (NL)
Bibliographic Reference: Paper presented: HT-CMC-2, Santa Barbara (US), August 21-24, 1995
Availability: Available from (1) as Paper EN 39024 ORA
Record Number: 199510845 / Last updated on: 1995-08-03
Original language: en
Available languages: en