September 1999 Hi-Nicalon/SiC Minicomposites with(Pyrocarbon/SiC)n Nanoscale Multilayered Interphases 2473 Application as Interphase in Thermostructural Composites"(in Fr ) Ph D. The- 24S. Jacques, A. Guette, F. Langlais, and X. Bourrat, " Characterization of SiC/C ites by Transmission Electron Microscopy, "J. ISR. Bodet, N. Jia, and R. E. Tressler, "Microstructural Instability and the er.Sc.,32,2969-75(1997 esultant Strength of Si-C-O(Nicalon) and Si-N-C-O(HPZ) Fibres,"J.Eur. Cera. Soc,16,653-64(1996) hioux, and A Oberlin, "Understanding nicalon" Fibre, J. Eur. Ceram Soc., 11, 95-103(1993 2D. B. Marshall, B N. Cox, and A G. Evans, "The Mechanics of Matrix 17D. J. Pysher, K C. Goretta, R S. Hodder Jr, and R. E, Tressler, "Strengths Cracking in Brittle-Matrix Fiber Composites, " Acta Metall, 33 [11] 2013 of Ceramic Fibers at Elevated Temperatures, "J. Am. Ceram. Soc 88(1989) Aveston, G, A. Cooper, and A. Kelly, "Single and Multiple Fracture sG. Hollon, R. Pailler, R. Naslain, F. Laanani, M. Monthioux, and P. Orly "Thermal Stability of a PCS-Derived SiC Fiber with a Low Oxygen Content sical Laboratory IPC Science and Technology Press, Ltd., Surrey, England, (Hi-Nicalon),J. Mater. Sci., 32, 327-47(1997) L Bobet and J. Lamon, "Thermal Residual Stresses in Ceramic Matri del and Finite Element Analysis, "Acta esmann,"Properties of Multilayered Interphases in SiC/SiC Chemical-Vapor- Infiltrated Composites withWeak'and" Interfaces, "J. Am. Ceram DS. Bertrand, J. Lamon, and R. Paillet, "Chemical, Mechanical and Statis- tical Properties of SiC Hi-Nicalon Fibers after Heat Treatment under Controlled 0819231526(99) PH. M. Yun and J. A. DiCarlo, "High Temperature Contraction Behavior of ed SiC Fibers, "Ceram. Eng. Sci. Proc., 1813]13 2J. Cabot, C. Chanu, S. Bertrand, R. Pailler, and J. Lamon, "Study of the eck, J. P. Viricelle, D. Ballou in Fr.). In Thomin, and A M. Flank,"SiC-Based Ceramic Fibres: Thermal Stability and Composites Thermostructuraux(LCTS), Pessac, France, 1996 Oxidation Behaviour, Key Eng. Mater, 132-136, 1950(1997) -B. Fredefon, O. Boisron, S Bertrand, R. Pailler, and J. Lamon, "Mechani- 3V, Calard and J. Lamon, "Simulation of the Matrix Fragmentation in Uni- cal Behavior of SiC/S directional Ceramic Composites"(in Fr ) P. 1285 in Comptes Rendus des dixi des Composites Thermostn emes Journees Nationales sur les Composites, JNC 10. Edited by D. Baptiste 2P. Dupel, X. Bourrat, andR. Pailler, "Structure of Pyrocarbon Infiltrated by Itin. Association pour les Materiaux Composites(AMAC), Pa Pulse-CVI, Carbon, 33 [ 1193(1995) France. 1996Application as Interphase in Thermostructural Composites” (in Fr.); Ph.D. The￾sis No. 1476. University of Bordeaux, France, March 29, 1996. 15R. Bodet, N. Jia, and R. E. Tressler, “Microstructural Instability and the Resultant Strength of Si–C–O (Nicalon) and Si–N–C–O (HPZ) Fibres,” J. Eur. Ceram. Soc., 16, 653–64 (1996). 16P. Le Coustumer, M. Monthioux, and A. Oberlin, “Understanding Nicalont Fibre,” J. Eur. Ceram. Soc., 11, 95–103 (1993). 17D. J. Pysher, K. C. Goretta, R. S. Hodder Jr., and R. E. Tressler, “Strengths of Ceramic Fibers at Elevated Temperatures,” J. Am. Ceram. Soc., 72 [2] 284– 88 (1989). 18G. Chollon, R. Pailler, R. Naslain, F. Laanani, M. Monthioux, and P. Orly, “Thermal Stability of a PCS-Derived SiC Fiber with a Low Oxygen Content (Hi-Nicalon),” J. Mater. Sci., 32, 327–47 (1997). 19J. L. Bobet and J. Lamon, “Thermal Residual Stresses in Ceramic Matrix Composites—I. Axisymmetrical Model and Finite Element Analysis,” Acta Metall. Mater., 43 [6] 2241–53 (1995). 20S. Bertrand, J. Lamon, and R. Pailler, “Chemical, Mechanical and Statis￾tical Properties of SiC Hi-Nicalon Fibers after Heat Treatment under Controlled Atmosphere,” to be published. 21J. Cabot, C. Chanu, S. Bertrand, R. Pailler, and J. Lamon, “Study of the Residual Stresses in Minicomposites” (in Fr.), Internal Report, Laboratoire des Composites Thermostructuraux (LCTS), Pessac, France, 1996. 22B. Fredefon, O. Boisron, S. Bertrand, R. Pailler, and J. Lamon, “Mechani￾cal Behavior of SiC/SiC Minicomposites” (in Fr.), Internal Report, Laboratoire des Composites Thermostructuraux (LCTS), Pessac, France, 1997. 23P. Dupel, X. Bourrat, and R. Pailler, “Structure of Pyrocarbon Infiltrated by Pulse-CVI,” Carbon, 33 [9] 1193 (1995). 24S. Jacques, A. Guette, F. Langlais, and X. Bourrat, “Characterization of SiC/C (B)/SiC Microcomposites by Transmission Electron Microscopy,” J. Mater. Sci., 32, 2969–75 (1997). 25J. Lamon, F. Rebillat, and A. G. Evans, “Microcomposite Test Procedure for Evaluating the Interface Properties of Ceramic Matrix Composites,” J. Am. Ceram. Soc., 78 [2] 401–405 (1995). 26D. B. Marshall, B. N. Cox, and A. G. Evans, “The Mechanics of Matrix Cracking in Brittle-Matrix Fiber Composites,” Acta Metall., 33 [11] 2013 (1985). 27J. Aveston, G. A. Cooper, and A. Kelly, “Single and Multiple Fracture”; p. 15 in Properties of Fiber Composites, Conference Proceedings of the National Physical Laboratory. IPC Science and Technology Press, Ltd., Surrey, England, U.K., 1971. 28F. Rebillat, J. Lamon, R. Naslain, E. Lara-Curzio, M. K. Ferber, and T. M. Besmann, “Properties of Multilayered Interphases in SiC/SiC Chemical-Vapor￾Infiltrated Composites with ‘Weak’ and ‘Strong’ Interfaces,” J. Am. Ceram. Soc., 81 [9] 2315–26 (1998). 29H. M. Yun and J. A. DiCarlo, “High Temperature Contraction Behavior of Polymer-Derived SiC Fibers,” Ceram. Eng. Sci. Proc., 18 [3] 135–46 (1997). 30O. Greck, J. P. Viricelle, D. Bahloul-hourlier, P. Goursat, M. Dalbin, S. Thomin, and A. M. Flank, “SiC-Based Ceramic Fibres: Thermal Stability and Oxidation Behaviour,” Key Eng. Mater., 132–136, 1950 (1997). 31V. Calard and J. Lamon, “Simulation of the Matrix Fragmentation in Uni￾directional Ceramic Composites” (in Fr.); p. 1285 in Comptes Rendus des Dixi￾e`mes Journe´es Nationales sur les Composites, JNC 10. Edited by D. Baptiste and A. Vautrin. Association pour les Mate´riaux Composites (AMAC), Paris, France, 1996. h September 1999 Hi-Nicalon/SiC Minicomposites with (Pyrocarbon/SiC)n Nanoscale Multilayered Interphases 2473