1. Chemical composition of SiC(Al) fiber

2. XRD patterns of SiC(Al) fiber and iG/SiC(Al) fiber

3. (a, c) Surface and (b, d) cross-sectional SEM images of (a, b) SiC(Al) fiber and (c, d) iG/SiC(Al) fiber

4. XRD patterns of SiC(Al) FBC and iG/SiC(Al) FBC

5. Optical photographs and SEM images of (a) SiC(Al) FBC and (b) iG/SiC(Al) FBC

6. (a, c, e, g) TEM and (b, d, f, h) HRTEM images of (a-d) SiC(Al) FBC and (e-h) iG/SiC(Al) FBC with insets in (a, e) showing corresponding distributions of crystal diameters and insets in (d, f, h) showing selected area electron diffraction (SAED) patterns

7. (a, e) HAADF images and (b-d, f-h) elemental mappings of (a-d) SiC(Al) FBC and (e-h) iG/SiC(Al) FBC

8. Load-displacement curves during the (a) flexural strength and (b) fracture toughness tests of SiC(Al) FBC and iG/SiC(Al) FBC

9. SEM images of fracture surfaces of (a-c) SiC(Al) FBC and (d-f) iG/SiC(Al) FBC

10. Mass change curves per unit area of iG/SiC(Al) FBC after oxidation at different temperatures

11. (a) Load-displacement curves during the flexural strength test and (b) residual bending strength of iG/SiC(Al) FBC after 100 h oxidation at different temperatures