R.R. Naslain et al/ Solid State ionics 141-142(2001)541-548 7 um S1S2 fiber Ms3$4 (b) Fig. 7. SEM micrographs of a model minicomposite fabricated by P-CVi from carbon fiber tow with a multilayered self-healing matrix: (a) detail of the S, and S, multilayers deposited on a single carbon fiber, b) the full S, to s, multilayer sequence and (c) cross section of the composite(partial view)[6] the Bu3C2(at low temperature)and SiC (at higher Acknowledgements temperature)glass former layers. These fluid oxide phases fill the microcracks, thus, increasing the life This work has been supported by CNRS through time of the composites under load PhD or post-doctoral grants given to S.B., F.H., P.D. 4. Conclusion References From the data presented in Section 3, the follow- ing conclusions can be drawn: (i) P-CVI is a novel [I] R. Naslain, F. Langlais, Mater. Sci. Res. 20(1986)145 processing technique suitable for infiltrating single 2) R, Naslain, Ceram. Trans. 58(1995)23 or multilayered interphases and matrices, in fiber [4]R.R. Naslain, Compos. Part A 29A(1998)1157. preforms, (i) multilayered interphases and matrices [5]R.R. Naslain, Ceram. Tr combining mechanical fuse layers(PyC or BN) and [6] F Lamouroux, S Bertrand, R. Pailler, R. Naslain, M Cataldi, glass-former layers(boron or/and silicon carbides) Comp. Sci. Technol. 59(1999)1073 improve the oxidation resistance in air of non-oxide nd, P. Forio, R. Pailler, J. Lamon, J. Am. Ceram CMCS. It is anticipated that P-CVI could be ex Soc.82(9)(1992465 [8]R L. Beattly, J. Nucl. Appl. Technol. 8(1970)45 tended to other multilayered ceramics and porous [9] W.A. Bryant, J Cryst. Growth 35(1976)257 bodie [10] K. Sugiyama, T. Nakamura, J. Mater. Sci. Lett. 6(1987)331R.R. Naslain et al.rSolid State Ionics 141–142 2001 541–548 ( ) 547 Fig. 7. SEM micrographs of a model minicomposite fabricated by P-CVI from carbon fiber tow with a multilayered self-healing matrix: aŽ . detail of the S and S multilayers deposited on a single carbon fiber, b the full S to S multilayer sequence and c cross section of the Ž. Ž. 1 2 1 4 composite partial view 6 . Ž . w x the B C at low temperature and SiC at higher Ž .Ž 13 2 temperature glass former layers. These fluid oxide . phases fill the microcracks, thus, increasing the life￾time of the composites under load. 4. Conclusion From the data presented in Section 3, the follow￾ing conclusions can be drawn: i P-CVI is a novel Ž . processing technique suitable for infiltrating single or multilayered interphases and matrices, in fiber preforms, ii multilayered interphases and matrices Ž . combining mechanical fuse layers PyC or BN and Ž . glass-former layers boron or Ž . rand silicon carbides improve the oxidation resistance in air of non-oxide CMCs. It is anticipated that P-CVI could be ex￾tended to other multilayered ceramics and porous bodies. Acknowledgements This work has been supported by CNRS through PhD or post-doctoral grants given to S.B., F.H., P.D. and F.L. References w x 1 R. Naslain, F. Langlais, Mater. Sci. Res. 20 1986 145. Ž . w x 2 R. Naslain, Ceram. Trans. 58 1995 23. Ž . w x 3 R. Naslain, Ceram. Trans. 79 1996 37. Ž . w x 4 R.R. Naslain, Compos. Part A 29A 1998 1157. Ž . w x 5 R.R. Naslain, Ceram. Trans. 99 1998 167. Ž . w x 6 F. Lamouroux, S. Bertrand, R. Pailler, R. Naslain, M. Cataldi, Comp. Sci. Technol. 59 1999 1073. Ž . w x 7 S. Bertrand, P. Forio, R. Pailler, J. Lamon, J. Am. Ceram. Soc. 82 9 1999 2465. Ž .Ž . w x 8 R.L. Beattly, J. Nucl. Appl. Technol. 8 1970 488. Ž . w x 9 W.A. Bryant, J. Cryst. Growth 35 1976 257. Ž . w x 10 K. Sugiyama, T. Nakamura, J. Mater. Sci. Lett. 6 1987 331. Ž