Poly(borosilazanes) As Precursors Of Si - B - C - N Glasses: Synthesis And High Temperature Properties

Poly(borosilazanes) with Si/B molar ratios of 3 and 9 were synthesized, via hydroboration, from vinyl-substituted cyclotrisilazane, [CH2= CH(CH3)SiNH]3, and borane-trimethylamine adduct, (CH 3)3N:BH3. The poly(borosilazanes) were pyrolyzed up to 1000°C under nitrogen atmosphere, resulting in amorphous silicon boron carbonitride glasses (SiBCN). An almost complete retention of the B content was observed in these products. The high temperature behavior of SiBCN glasses was studied by X-ray diffraction and infrared spectroscopy. The glasses containing the larger amounts of boron remained amorphous to higher temperatures when compared with the parent B-free SiCN glass, which, at 1500°C, crystallizes in SiC. At 2000°C, the ceramic product derived from SiBCN was characterized as BN/SiC composite. © 2004 Elsevier B.V. All rights reserved.348156161Kroke, E., Li, Y.-L., Konetschny, C., Lecomte, E., Fasel, C., Riedel, A., (2000) Mater. Sci. Res. R, (26), p. 97Jansen, M., Jäschke, B., Jäschke, T., (2002) Struct. Bond., 101, p. 137Aldinger, F., Weimann, M., Bill, J., (1998) Pure Appl. Chem., 70, p. 439Schmidt, W.R., Narsavage-Heald, D.M., Jones, D.M., Marchetti, P.S., Raker, D., Maciel, G.E., (1999) Chem. Mater., 11, p. 1455Wang, Z., Aldinger, F., Riedel, R., (2001) J. Am. Ceram. Soc., 84, p. 2179Schiavon, M.A., Sorarù, G.D., Yoshida, I.V.P., (2002) J. Non-Crystal. Solids, 304, p. 76Bellamy, L.J., (1966) The Infrared Spectra of Complex Molecules, , Methuen, LondonHan, H.N., Lindquist, D.A., Haggerty, J.S., Seyferth, D., (1992) Chem. Mater., 4, p. 705Funayama, O., Nakahara, H., Tezuka, A., Ishii, T., Isoda, T., (1994) J. Mater. Sci., 29, p. 2238Bahloul, D., Pereira, M., Goursat, P., Yive, N.S.C.K., Corriu, R.J.P., (1993) J. Am. Ceram. Soc., 76, p. 1156Yive, N.C.K., Corriu, R.J.P., Leclerq, D., Mutin, P.M., Vioux, A., (1992) Chem. Mater., 4, p. 141(1973) Powder Diffraction File Search Manual, , Joint Committee on Powder Diffraction Standards, SwarthmoreShirahata, N., Kijima, K., Ma, X.L., Ikuhara, Y., (2001) Jpn. J. Appl. Phys., 140, p. 3969Winternitz, P.F., Carotti, A.A., (1960) J. Am. Ceram. Soc., 82, p. 2430Bahloul, D., Pereira, M., Goursat, P., (1993) J. Am. Ceram. Soc., 76, p. 116