抄録
Fiber reinforced silicon nitride and mullite composites, derived from continuous fiber, have been developed for applications requiring extreme toughness. They consisted of unidirectional carbon fiber reinforced matrics of the composites.
The composites were fabricated by a process consisting of slurry impregnation followed by hot pressing.
Measurement of sintering characteristics and observation of metallographic structure in the composites were carried out.
Flexural strength and fracture toughness of the composites at room temperature and at 1200°C were measured. Fracture toughness of silicon nitride matrix composite and mullite matrix composite were 28.1 MPa√m and 18.0 MPa√m at room temperature respectively.
