Journal of the American Ceramic Society-Rebillat et al. Vol 81. No 9 8 事2 aE58ag edw sens 送到 EETable III. Interface Characteristics, As a Function of the Number of (C–SiC) Sequnces (n), for the SiC/SiC Composites Reinforced with Untreated Fibers† Sample Embedded length (mm) Debonding stress (MPa) Maximum stress (MPa) Stress drop with extraction (MPa) Imposed displacement (mm) Shear stress from plateau (MPa) Shear stress from fitting (MPa) Friction coefficient, m Axial stress (MPa) Clamping stress (MPa) Debond length (mm) Amplitude of roughness (nm) Ratio of debonding/drop stresses I (n 4 1) 390 510 1380 735 0.8 9.4 14 0.022 −345 −720 250 44 1.1 (30) (280) (735) (530) (0.6) (4.7) (8) (0.011) (300) (240) (80) (20) (0.5) A (n 4 2) 440 810 2930 915 1.7 19.3 31 0.031 −670 −1000 280 63 0.9 (10) (280) (725) (315) (0.6) (5) (7) (0.007) (340) (66) (80) (6) (0.3) K (n 4 4) 480 640 1850 500 0.6 12.53 28 0.037 −635 −890 190 50 1.6 (10) (160) (600) (250) (0.3) (3.5) (13) (0.016) (175) (250) (60) (20) (0.8) †The value in parentheses given beneath each measurement is the standard deviation. Fig. 11. Residual stresses in SiC/SiC composites, as a function of the number of (C–SiC) layers (n) in the interphase. 2322 Journal of the American Ceramic Society—Rebillat et al. Vol. 81, No. 9