X Li et al/ Materials Science and Engineering C 28(2008)1501-1508 Fig. 16. Schematics of crack paths in specimen BS-5: (a)crack initiation, (b) stable crack deflection and propagation within the BN interfacial layers, and(c]o) unstable fracture. [13]BL Smith, T.E. Schaffer, M. Viani, J.B. Thompson, NA Frederick. ]. Kindt, A Belcher. [27] C.A. Wang, Y Huang. Q.F. Zan, LH. Zou, S.Y. Cai, Journal of the American Ceramic I ZY. Tang, NA Kotov, S. Magonov, B Ozturk, Nature Materials 2(2003)413-418. [28 H.Y. Liu, B.R. Lawn, S.M. Hsu, Journal of the American Ceramic Society 79(1996) lG. Mayer. Science310(2005)1144-1147 [291 LH Zou, Y Huang, CA Wang, Journal of the European Ceramic Society 24(2004) 17] G. Mayer, M. Sarikaya, Experimental Mechanics 42(2002)395-403 Saiz, r.K. Nalla, A.P. Tomsia, Science 311(2006)515-518 [30 LH. Zou, Y Huang R F Chen, C.A. Wang, D.S. Park, Journal of the European Ceramic 19] S Zhao, ang, S.Q. zhao, wZ Li, H.D. Li, Composites Science and Technology [31 A Phillips, W Clegg Tw. Clyne, Acta Metall Mater. 41 (1993)805-817. [20] J.L He, WZ Li, H D. Li, Wang, LD. Wang, Surface Coatings Technology [32 A Phillips, W.. Clegg. T.w. Clyne, Acta Metallurgica et Materialia 41(1993) [21 w.]. Clegg. K Kendall, N M. Alford, T.w. Button, J.D. Birchall, Nature 347(15 33] A. Phillips, v」 34]KS.Blanks, A Kristoffersson, E Carlstrom, w. ]. Clegg. Journal of the European of the ar 23 D. Kovar, M. D Thouless, )W. Halloran, Journal of the American Ceramic Society 81 35 M.P. Rao, A Sanchez-Herencia, GE Beltz, R.M. Mcmeeking. F F. Lange, Science 286 1999)102-105 24]S 125S. Baskaran, J.W. Halloran, Journal of the American Ceramic Society 76(1993) [38 w.c. Oliver, G M. Pharr, Joumal of Materials Research 7(1992)1564-1583 2217-2224 [26] C.A. Wang. Y. Huang Q.F. Zan, H Guo, S.Y. Cai, Materials Science Engineerin C-Biomimetic and Supramolecular Systems 11(2000)9-12.[13] B.L. Smith, T.E. Schaffer, M. Viani, J.B. Thompson, N.A. Frederick, J. Kindt, A. Belcher, G.D. Stucky, D.E. Morse, P.K. Hansma, Nature 399 (1999) 761–763. [14] C. Sanchez, H. Arribart, M.M.G., G. Guille, Nature Materials 4 (2005) 277–288. [15] Z.Y. Tang, N.A. Kotov, S. Magonov, B. Ozturk, Nature Materials 2 (2003) 413–418. [16] G. Mayer, Science 310 (2005) 1144–1147. [17] G. Mayer, M. Sarikaya, Experimental Mechanics 42 (2002) 395–403. [18] S. Deville, E. Saiz, R.K. Nalla, A.P. Tomsia, Science 311 (2006) 515–518. [19] S. Zhao, J.Z. Zhang, S.Q. Zhao, W.Z. Li, H.D. Li, Composites Science and Technology 63 (2003) 1009–1014. [20] J.L. He, W.Z. Li, H.D. Li, J. Wang, L.D. Wang, Surface & Coatings Technology 104 (1998) 109–112. [21] W.J. Clegg, K. Kendall, N.M. Alford, T.W. Button, J.D. Birchall, Nature 347 (1990) 455–457. [22] H.Y. Liu, S.M. Hsu, Journal of the American Ceramic Society 79 (1996) 2452–2457. [23] D. Kovar, M.D. Thouless, J.W. Halloran, Journal of the American Ceramic Society 81 (1998) 1004–1042. [24] S. Baskaran, S.D. Nunn, D. Popovic, J.W. Halloran, Journal of the American Ceramic Society 76 (1993) 2209–2216. [25] S. Baskaran, J.W. Halloran, Journal of the American Ceramic Society 76 (1993) 2217–2224. [26] C.A. Wang, Y. Huang, Q.F. Zan, H. Guo, S.Y. Cai, Materials Science & Engineering C-Biomimetic and Supramolecular Systems 11 (2000) 9–12. [27] C.A. Wang, Y. Huang, Q.F. Zan, L.H. Zou, S.Y. Cai, Journal of the American Ceramic Society 85 (2002) 2457–2461. [28] H.Y. Liu, B.R. Lawn, S.M. Hsu, Journal of the American Ceramic Society 79 (1996) 1009–1014. [29] L.H. Zou, Y. Huang, C.A. Wang, Journal of the European Ceramic Society 24 (2004) 2861–2868. [30] L.H. Zou, Y. Huang, R.F. Chen, C.A. Wang, D.S. Park, Journal of the European Ceramic Society 23 (2003) 1987–1996. [31] A.J. Philllips, W.J. Clegg, T.W. Clyne, Acta Metall. Mater. 41 (1993) 805–817. [32] A.J. Phillips, W.J. Clegg, T.W. Clyne, Acta Metallurgica et Materialia 41 (1993) 819–827. [33] A.J. Phillips, W.J. Clegg, T.W. Clyne, Composites 25 (1994) 524–533. [34] K.S. Blanks, A. Kristoffersson, E. Carlstrom, W.J. Clegg, Journal of the European Ceramic Society 18 (1998) 1945–1951. [35] M.P. Rao, A.J. Sanchez-Herencia, G.E. Beltz, R.M. Mcmeeking, F.F. Lange, Science 286 (1999) 102–105. [36] X.D. Li, B. Bhushan, Materials Characterization 48 (2002) 11–36. [37] B. Bhushan, X.D. Li, International Materials Review 48 (2003) 125–164. [38] W.C. Oliver, G.M. Pharr, Journal of Materials Research 7 (1992) 1564–1583. Fig. 16. Schematics of crack paths in specimen BS-5: (a) crack initiation, (b) stable crack deflection and propagation within the BN interfacial layers, and (c)–(f) unstable fracture. 1508 X. Li et al. / Materials Science and Engineering C 28 (2008) 1501–1508