Effects of in-situ fiber strength characteristics of mechanical properties of SiC(f)/SiC composites
- Argonne National Lab., IL (United States)
Nicalon-fiber-reinforced silicon carbide (SiC) matrix composites were tested in flexure at room and elevated temperatures. Measured strength of the composites decreased slightly from a room-temperature value of 400 MPa to 380 MPa at 1200{degrees}C. However, at 1300{degrees}C, strength decreased significantly to 290 MPa. This rapid decrease in strength at 1300{degrees}C is believed to be due to degradation in strength of the reinforcing fibers. In-situ fiber strength and fiber pullout distribution in fractured composites were estimated by fractographic techniques. Correlations were made between the measured strengths of composites and in-situ fiber strength characteristics to explain the mechanical properties of composites at room and elevated temperatures.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 96531
- Report Number(s):
- CONF-940416--
- Country of Publication:
- United States
- Language:
- English
Similar Records
Mechanical behavior of SiC(f)/SiC composites and correlation to in situ fiber strength at room and elevated temperatures
Influence of fiber lay-up sequence on mechanical properties of SiC(f)/SiC composites