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Z Krstic, V.D. Krstic/Jounal of the European Ceramic Sociery 28 (2008)1723-1730 higher level of porosity was found in these interfaces than in 10. Davis,J.B,Kristofferson,A,Carlstorm, Eand Clegg,WJ.Fabrication BN+Al2O3 interface. The level of porosity in both BN-based and crack deflection in ceramic laminates with porous interlayers. J. Am. interfaces is controlled by the amount of YAG phase present in Ceran.Soc.,2000,83,2369-2374 the interface. The interface with higher content of YAG phase 1. OhjL, T, Shigegaki, Y, Miyajima, T. and Kanzaki, S. Fracture resistance contains lower level porosity, as well as higher Youngs modu- 991-994 12. Sanchez-Herencia, A.J., Pascual. C, He, J and Lange, F. F. ZrO/ZrO Due to the crack interaction with bn interface in radial and layered composites for crack bifurcation. J. Am. Ceram. Soc., 1999,8 axial direction, very high apparent fracture toughness, strength 13. Mawdsley, I. Kover, D. and Halloran, I. w. Fracture behavior of alu. mina/monazite multilayer laminates. J Am. Ceram. Soc., 2000, 83, 802-808 14. Liu, H and Hsu, S M., Fracture behavior of multilayer silicon nitride/boron References nitride ceramics. J. Am. Ceram. Soc.. 1996.79.2452-2457 5. Shigegaki, Y, Brito, M. E, Hirao, K, Toriyama, M. and Kanzaki. S,B- 1. Clegg, w.J., Kandall, K Alford, N M, Birchall, D and Button, T w,A SiALON-silicon nitride multilayered composites. J Am Ceram Soc. 1997 mple way to make tough ceramics. Nature, 1990, 347, 455-457 80.2624-2628. 2. Kovar,D. King. B.H. Trice.R. W and Halloran,J W. fibrous monolithic 16. Plucknett, K P, Caceres, C H, Hughers, C and wilkinson, D S, Process- m.SoC,1997,80,2471-248 ing of tape cast laminates prepared from fine alumina/zirconia powders 3. Koh, Y. H, Kim, H. W. and Kim, H. E, Mechanical properties of Am Ceram.Soc.,1994,77,2145-2153 three-layered monolithic silicon nitride-fibrous silicon nitride/boron nitride 17. Katsuki, H and Hirata, Y, Coat of alumina sheet with needle-like mulite. J. Ceram Soc. Jpn., 1990, 98, 1114-1119 4.She,J,Inoe,T and Ueno,K, Multilayer Al203/SiC ceramics with improved 18. Russo, C J, Harmer, M P, Chan, M. H and Miller, G. A Design of mechanical behavior. J. Eur Ceram Soc. 2000. 20. 1771-1775 laminated ceramic composites for improved strength and toughness. J Am. 5. Atkins, A. G, Imparting h and toughness to brittle composites. Ceran.Soc.,1992,75,3396-3400 Nature,1974,252,116-11 19. Wang, C, Huang, Y, Zan, Q, Zou, L and Cai, S, Control of composition 6. Clegg, w.J., The fracture and failure of laminar ceramic composites. Acta and structure in laminated silicon nitride/boron nitride composites. J. Am. Metall. Mater,1992,40,3085-3093 Ceram.Soc,2002,85,2457-2461 7.Zhang, L and Krstic, VD, High toughness silicon carbide/graphite laminar 20. Kovar, D Thouless, M. D and Halloran, J.W., Crack deflection and propa. composite by slip casting. Theor Appl. Fract. Mech., 1995, 24, 13-19 gation in layered silicon nitride/boron nitride ceramics. J. Am. Ceram Soc. 8. Tu, w.C., Lange, F. F and Evans, A. G, Concept for a damage tolerant 998,81,1004-1012. omposite with"strong" interfaces. J. Am. Ceram Soc., 1996, 79(2), 41 21. Yu. Z.B. and Krstic. V.D. Fabrication and characterization of laminated SiC ceramics with self-sealed ring structure. J Mater. Sci., 2003. 38.4735-4738 9. Blanks.K. S. Kristofferson. A. Carlstorm. E and Clegg. W. J.J. Enr 22. Yu, Z, Krstic, Z and Krstic, V. D, Laminated Si3 N4/SiC composites with Cerm.Soc.,1998,18,1945-1951 self-sealed structure. Key Eng. Mater, 2005, 280-283, 1873-18761730 Z. Krstic, V.D. Krstic / Journal of the European Ceramic Society 28 (2008) 1723–1730 higher level of porosity was found in these interfaces than in BN + Al2O3 interface. The level of porosity in both BN-based interfaces is controlled by the amount of YAG phase present in the interface. The interface with higher content of YAG phase contains lower level porosity, as well as higher Young’s modu￾lus. Due to the crack interaction with BN interface in radial and axial direction, very high apparent fracture toughness, strength and work of fracture are found in these laminates. References 1. Clegg, W. J., Kandall, K., Alford, N. M., Birchall, D. and Button, T. W., A simple way to make tough ceramics. Nature, 1990, 347, 455–457. 2. Kovar, D., King, B. H., Trice, R. W. and Halloran, J. W., Fibrous monolithic ceramics. J. Am. Ceram. Soc., 1997, 80, 2471–2487. 3. Koh, Y. H., Kim, H. W. and Kim, H. E., Mechanical properties of three-layered monolithic silicon nitride-fibrous silicon nitride/boron nitride monolith. J. Am. Ceram. Soc., 2002, 85, 2840–2842. 4. She, J., Inoe, T. and Ueno, K., Multilayer Al2O3/SiC ceramics with improved mechanical behavior. J. Eur. Ceram. Soc., 2000, 20, 1771–1775. 5. Atkins, A. G., Imparting strength and toughness to brittle composites. Nature, 1974, 252, 116–118. 6. Clegg, W. J., The fracture and failure of laminar ceramic composites. Acta Metall. Mater., 1992, 40, 3085–3093. 7. Zhang, L. and Krstic, V. D., High toughness silicon carbide/graphite laminar composite by slip casting. Theor. Appl. Fract. Mech., 1995, 24, 13–19. 8. Tu, W. C., Lange, F. F. and Evans, A. G., Concept for a damage tolerant composite with “strong” interfaces. J. Am. Ceram. Soc., 1996, 79(2), 417– 424. 9. Blanks, K. S., Kristofferson, A., Carlstorm, E. and Clegg, W. J., J. Eur. Ceram. Soc., 1998, 18, 1945–1951. 10. Davis, J. B., Kristofferson, A., Carlstorm, E. and Clegg, W. J., Fabrication and crack deflection in ceramic laminates with porous interlayers. J. Am. Ceram. Soc., 2000, 83, 2369–2374. 11. Ohji, T., Shigegaki, Y., Miyajima, T. and Kanzaki, S., Fracture resistance behavior of multilayered silicon nitride. J. Am. Ceram. Soc., 1997, 80, 991–994. 12. Sanchez-Herencia, A. J., Pascual, C., He, J. and Lange, F. F., ZrO2/ZrO2 layered composites for crack bifurcation. J. Am. Ceram. Soc., 1999, 82, 1512–1518. 13. Mawdsley, J., Kover, D. and Halloran, J. W., Fracture behavior of alu￾mina/monazite multilayer laminates. J. Am. Ceram. Soc., 2000, 83, 802–808. 14. Liu, H. and Hsu, S. M., Fracture behavior of multilayer silicon nitride/boron nitride ceramics. J. Am. Ceram. Soc., 1996, 79, 2452–2457. 15. Shigegaki, Y., Brito, M. E., Hirao, K., Toriyama, M. and Kanzaki, S., - SiALON-silicon nitride multilayered composites. J. Am. Ceram. Soc., 1997, 80, 2624–2628. 16. Plucknett, K. P., Caceres, C. H., Hughers, C. and Wilkinson, D. S., Process￾ing of tape cast laminates prepared from fine alumina/zirconia powders. J. Am. Ceram. Soc., 1994, 77, 2145–2153. 17. Katsuki, H. and Hirata, Y., Coat of alumina sheet with needle-like mulite. J. Ceram. Soc. Jpn., 1990, 98, 1114–1119. 18. Russo, C. J., Harmer, M. P., Chan, M. H. and Miller, G. A., Design of laminated ceramic composites for improved strength and toughness. J. Am. Ceram. Soc., 1992, 75, 3396–3400. 19. Wang, C., Huang, Y., Zan, Q., Zou, L. and Cai, S., Control of composition and structure in laminated silicon nitride/boron nitride composites. J. Am. Ceram. Soc., 2002, 85, 2457–2461. 20. Kovar, D., Thouless, M. D. and Halloran, J. W., Crack deflection and propa￾gation in layered silicon nitride/boron nitride ceramics. J. Am. Ceram. Soc., 1998, 81, 1004–1012. 21. Yu, Z. B. and Krstic, V. D., Fabrication and characterization of laminated SiC ceramics with self-sealed ring structure. J. Mater. Sci., 2003, 38, 4735–4738. 22. Yu, Z., Krstic, Z. and Krstic, V. D., Laminated Si3N4/SiC composites with self-sealed structure. Key Eng. Mater., 2005, 280–283, 1873–1876.
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