2318 Journal of the American Ceramic SocieryRebillat et al. Vol 81. No 9 m (b 1 um Fig. 4. Micrographs showing the surface of a protruding fiber after push-out tests performed on SiC/SiC composite A with untreated fi. Fig. 6. SEM micrograph rs protruding after push-out tests on bers and a multilayered interphase(n(C-SiC)=2)(a) protruding composites with treated f multilayered interphases(a) SiC/ fiber and(b)sliding fiber surface) SiC composite B and(b) y00 f 4000 Displacement (um) Fig. 5. Plot of push-out stress versus fiber-end displacement for a composite with treated Nicalon fibers(composite B). (The contribution of the load-train compliance to the measured displacement has been subtracted.Fig. 4. Micrographs showing the surface of a protruding fiber after push-out tests performed on SiC/SiC composite A with untreated fi￾bers and a multilayered interphase (n(C–SiC) 4 2) ((a) protruding fiber and (b) sliding fiber surface). Fig. 5. Plot of push-out stress versus fiber-end displacement for a composite with treated Nicalon fibers (composite B). (The contribution of the load-train compliance to the measured displacement has been subtracted.) Fig. 6. SEM micrographs of fibers protruding after push-out tests on composites with treated fibers and multilayered interphases ((a) SiC/ SiC composite B and (b) SiC/SiC composite L). 2318 Journal of the American Ceramic Society—Rebillat et al. Vol. 81, No. 9