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w. Yang et al Materials Science and Engineering 4345(2003)28-35 The influences of the interfacial shear stress on the 8T. K. Jacobsen, P. Brondsted, J. Am. Ceram Soc. 84(5)(2001) Pls were discussed based on both a theoretical mode calculations and the experiment results. The highest PLS 9]RJ Kerans, R.S. Hay, N.J. Pagano, T.A. Parthasarathy, Ceram. as achieved by the composites with interfacial shear (10R. Naslain, in: A.G.Evans, R. Naslain(Eds),Ceramic Transac stress of x 340 MPa. Attractive promising was exhib- ons High-Temperature Ceramic-Matrix Composites Il: Manu ited on further improvement of the strength of the facturing and Materials Development, vol 58, America Ceramic composites through further improvement of the inter Society, Westerville, OH, 1995, P. 23 facial properties and matrix densification process. [1 w. Yang, H. Araki, T Noda, J.Y. Park, Y Katoh, T. Hinoki, J. Yu, A. Kohyama, submitted to J Am Ceram Soc C. Droillard, J. Lamon, J. Am. Ceram Soc. 79(4)(1996)849. S. Bertrand. P. Forio. R. Pailler J. Lamon. J. Am. Ceram. Soc. 82 Acknowledgements (9)(19992465 [14 T M. Besmann, E.R. Kupp, E. Lara-Curzio, K L More, J. Am Ceram.Soc.83(12)(2000)3014 This work was supported by the CREST, Japan [15] T Ishikawa, Y. Kohtoku, K. Kumagawa, T. Yamamura, T Science and Technology Corporation asawa, Nature391(6669)(1998)773. [16 G.E. Youngblood, R H. Jones, A Kohyama, LL. Snead, J Nucl. Mater.258-263(1998)1551 [17 w. Yang, A. Kohyama, T Noda, Y. Katoh, H. Araki, J. Yu, J References Nucl. Mater, in press [18 w. Yang, Development of CvI Process and Property Evaluation [A.Kohyama, M. Seki, K. Abe, T. Muroga, H. Matsui,S of CVI-Sic/SiC Composites, Doctoral thesis, Institute of Ad- Jitsukawa. S. Matsuda, J. Nucl. Mater. 283-287(2000)20 []AG. Evans, J Am Ceram Soc. 73(2)(1990) [19 ASTMC 1341-97, Standard Test Method for Flexural Properties 3]D. Brewer, Mater. Sci. Eng. A261(1999)284. of Continuous Fiber-reinforced Advanced Ceramic Composites [4 T Noda, H. Araki, F. Abe, M. Okada, J Nucl. Mater. 191-194 2000.pp.509-526 (1992)539 [ E. Inghels, J. Lamon, J. Mater. Sci. 26(1991)5403. [5 LL. Snead, O.J. Schwarz, J Nucl. Mater. 219(1995)3. 21 E. Inghels, J. Lamon, J Mater. Sci. 26(1991)5411 [6R H. Jones, C H. Henager, Jr, G.w. Hollenberg. J Nucl. Mater. [22A.G. Evans, J.-M. Domergue, E. Vagaggini, J. Am. Ceram Soc. 191-194(1992)75 77(6)01994)1425 [7 T.M. Besmann, D P. Stinton, E.R. Kupp, S Shanmugham, P K. (23 J.M. Domergue, F.E. Heredia, A.G. Evans, J. Am. Ceram Soc. Liaw, J. Mater Res. Soc. Symp. Proc. 458(1997)1 79(1)(1996161The influences of the interfacial shear stress on the PLS were discussed based on both a theoretical mode calculations and the experiment results. The highest PLS was achieved by the composites with interfacial shear stress of /340 MPa. Attractive promising was exhibited on further improvement of the strength of the composites through further improvement of the interfacial properties and matrix densification process. 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