Abstract
Enthalpies of formation were determined for β-sialon phases (Si6–zAlzOzN8–z, z = 0.46 to 3.6) by high-temperature oxidative drop solution calorimetry using an alkali-metal borate (52 wt% LiBo2; 48 wt% NaBO2) solvent. Oxygen gas was bubbled through the melt to accelerate oxidation of the oxynitride samples during dissolution. Sialons near z = 2 appear less stable energetically than ones with higher or lower nitrogen content. A large configurational entropy contribution for sialons with z > 2 may further stabilize these materials. This larger free energy driving form may be the reason for success in pulse-activated processing of these materials. The enthalpies of formation further suggest that a greater driving form for oxynitride formation exists in batch synthesis using SiO2 rather than Al2O3.
Similar content being viewed by others
References
M. Mitomo and G. Petzow, MRS Bull. 20(2), 19 (1995).
M.J. Hoffman and G. Petzow, in Silicon Nitride Ceramics— Scientific and Technological Advances, edited by I-W. Chen, P.F. Becher, M. Mitomo, G. Petzow, and T-S. Yen (Mater. Res. Soc. Symp. Proc. 287, Pittsburgh, PA, 1993), p. 3.
K.H. Jack, J. Mater. Sci. 11, 1135 (1976).
Y. Oyama and O. Kamigaito, Jpn. J. Appl. Phys. 10, 1637 (1971).
K.H. Jack and W.I. Wilson, Nat. Phys. Sci. 238, 28 (1972).
M.N. Rahaman, F.L. Riley, and R.J. Brook, J. Am. Ceram. Soc. 63, 648 (1980).
S. Umebayashi, K. Kishi, E. Tani, and K. Kobayashi, Yogyo Kyokaishi 92, 35 (1984).
T. Ekström, P. O. Käu, M. Nygren, and P.O. Olsson, J. Mater. Sci. 24, 1853 (1989).
J. Briggs, Mater. Res. Bull. 12, 1047 (1977).
J.G. Lee and I.B. Cutler, Am. Ceram. Soc. Bull. 58, 869 (1979).
P.D. Ramesh and K.J. Rao, J. Mater. Res. 9, 1929 (1994).
J. Lis, S. Majorowski, J.A. Puszynski, and V. Hlavacek, Ceram. Bull. 70, 1658 (1991).
S. Elder, F.J. Disalvo, L. Topor, and A. Navrotsky, Chem. Mater. 5, 1545 (1993).
J. McHale, G.R. Kowach, A. Navrotsky, and F.J. Disalvo, Chem. Eur. J. 2, 1514 (1996).
J.M. McHale, A. Navrostsky, G.R. Kowach, V.E. Balbarin, and F.J. DiSalvo, Chem. Mater. 9, 3096 (1997).
A. Navrotsky, S.H. Risbug, J-J. Liang, and V.J. Leppert, J. Phys. Chem. B 101, 9433 (1997).
J-J. Liang, L. Topor, A. Navrotsky, Y. Kanke, and M. Mitomo, J. Mater. Sci. 14, 1959 (1999).
S.H. Risbud and C.H. Shan, Mater. Sci. Eng. A204, 1460 (1995).
I.J. Shon, Z.A. Munir, K. Yamazaki, and K. Shoda, J. Am. Ceram. Soc. 79, 875 (1996).
Y. Miyamoto, K. Tanaka, M. Shimada, and M. Jouzumi, in Ceramic Materials and Components for Engines, edited by W. Bunk and H. Hausner (Deutsche Keramische Gesellschaft, Luebeck-Travemuende, Germany, 1986), p. 271.
N. Ingelström and T. Ekström, Proceedings of International Conference on Hot Isostatic Pressing, Lulea, Sweden, 15–16 June 1987 (Centek, Sweden, 1988).
A.C. Larson and R.B. Von Dreele, GSAS: General Structure Analysis System (Los Alamos National Laboratory, Los Alamos, NM, 1994).
A. Navrotsky, Phys. Chem. Miner. 2, 89 (1977).
A. Navrotsky, Phys. Chem. Miner. 24, 222 (1997).
M. Mitomo, N. Kuramoto, M. Tsutsumi, and H. Suzuki, Yogyo-Kyokaishi 86, 26 (1978).
P.L. Land, J.M. Wimmer, R.W. Burns, and N.S. Choudbury. J. Am. Ceram. Soc. 61, 56 (1978).
A. Takase, S. Umebayashi, and K. Kishi, J. Mater. Sci. Lett. 1, 529 (1982).
M. Haviar and Ø. Johannesen, Adv. Ceram. Mater. 3, 405 (1988).
M.W. Chase, Jr., C.A. Davis, J.R. Downey, Jr., D.J. Frurip, R.A. McDonald, and A.N. Syverud, J. Phys. Chem. Ref. Data 14, Suppl. 1, part II, 1540 (1985).
A. Navrotsky, Am. Mineral. 79, 589 (1994).
R.A. Robie and B.S. Hemingway, Thermodynamic properties of minerals and related substances at 298.15 K and 1 bar (105 Pascals) pressure and high temperatures, U.S. Geol. Survey Bull. 2131 (U.S. Geological Survey, Washington, D.C., 1995).
L. Dumitrescu and B. Sundman, J. Eur. Ceram. Soc. 15, 239 (1995).
M. Mitomo, N. Kuramoto, and Y. Inomata, J. Mater. Sci. 14, 2309 (1979).
S. Bandyophadyay and J. Mukerji, J. Am. Ceram. Soc. 70, C-273 (1987).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Liang, JJ., Navrotsky, A., Leppert, V.J. et al. Thermochemistry of Si6–zAlzOzN8–z(z = 0 to 3.6) materials. Journal of Materials Research 14, 4630–4636 (1999). https://doi.org/10.1557/JMR.1999.0626
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1557/JMR.1999.0626