D woven and D braided SiCf SiC composites

Table 2.
Flexural properties of 2D woven and 3D braided composites.SpecimenElastic modulus (GPa)Flexural strength (MPa)Displacement at load maximum (mm)2D156.8485.6±46.50.4963D188.8540.7±42.30.367Full-size tableTable optionsView in workspaceDownload as CSV
The typical stress-displacement curve for 3D-braided SiCf/SiC composite showed BIM 23127 gradual decrease in stress after reaching the maximum bend and the stress did not become zero after the large deformation owing to the tolerance of fibers (Fig. 5). In comparison, anaphylaxis apparent plasticity was not pronounced for 2D-woven composite. This may be attributed to the fact 2D-woven SiCf/SiC composites had pre-existing matrix cracks or defects in the processing, though the analysis of inter/intra-fiber bundle pores (Fig. 2) did not show any clear differences from 3D-braided SiCf/SiC composites.
Fig. 5. Typical Bend strength vs displacement curves for 2D woven CVI SiC/SiC composites and 3D braided composite.Figure optionsDownload full-size imageDownload as PowerPoint slide