Journal of the American Ceramic Society-Rebillat et al. Vol 81. No 4 Table ll. Interfacial Parameters Calculated from the measured Debonding and Maximum Stresses from Microindentation Push-Out Tests Coefficient of Thickness Interfacial shear strength, Ts (MPa) Material I 0.03 -460 320(10) 170(40) 0.03 39030) 200(100) 180(100) 190(70)2 170(70)产 160(60) Material J 140(13) 360(150) 0.08 1100 180(5) 00(40) 1380(40) 380(30)2 1360(30)2 Material P 675(85) 615(80) Values given in parentheses are standard deviations. Values for H, the clamping stress, and T were obtained from Takuku and Arridge. 4 1Average value: 90(100) 0.2 80(10) 1000(100) 990(100) 875(190) 870(180)2 16 Model 1200 Extracted 30 0 l000 Displacement (nm) (b) Fig 8. Nanoindentation tests on SiC/C/SiC composites(composite J)((a) penetration of the diamond in the fiber and(b)extraction of theTable III. Interfacial Parameters Calculated from the Measured Debonding and Maximum Stresses from Microindentation Push-Out Tests† Coefficient of friction, m Clamping stress (MPa) Interfacial shear stress, t (MPa) Thickness (mm) Interfacial shear strength, ts (MPa) Eq. (13) Eq. (11) Eq. (9) Material I 0.03 −460 13 320 (10) 185 (40) 170 (40) 150 (40) 0.03 −460 13 390 (30) 200 (100) 180 (100) 170 (90) 190 (70)‡ 170 (70)‡ 160 (60)‡ Material J 0.08 −1100 88 140 (13) 1360 (150) 1340 (150) 1210 (130) 0.08 −1100 88 180 (5) 1400 (40) 1380 (40) 1250 (40) 1380 (30)‡ 1360 (30)‡ 1230 (30)‡ Material P 0.2 −1300 160 45 (5) 680 (95) 675 (85) 615 (80) 0.2 −1300 160 80 (10) 1000 (100) 990 (100) 900 (100) 875 (190)‡ 870 (180)‡ 790 (160)‡ † Values given in parentheses are standard deviations. Values for m, the clamping stress, and t were obtained from Takuku and Arridge.24 ‡Average value. Fig. 8. Nanoindentation tests on SiC/C/SiC composites (composite J) ((a) penetration of the diamond in the fiber and (b) extraction of the load-versus-fiber-end-displacement curve from a nanoindentation test). 972 Journal of the American Ceramic Society—Rebillat et al. Vol. 81, No. 4