Abstract
The strength of as-machined and pre-oxidized hot-pressed silicon nitride was measured in three-point bending at temperatures of 23, 800, 1000, and 1100°C as a function of stressing rate. Pre-oxidation at 980°C for 50 h significantly increased the strength for the test temperatures of 23 and 800°C; however, at 1000°and 1100°C the strengths of pre-oxidized and as-machined samples were statistically indistinguishable and significantly less than the room temperature strengths. The fatigue resistance of the pre-oxidized specimens was found to be similar to that of the as-machined specimens at all temperatures with both exhibiting a high fatigue resistance (N=100) at 23 and 800°C and a significant decrease in fatigue resistance (N=20) at 1000 and 1100°C. Additional results showed that flaw generation and the growth of existing flaws are competing processes at high temperatures and fracture strength is determined by the most dominant of these processes.
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References
M.E. Gulden and A.G. Metcalf, “Stress Corrosion of Silicon Nitride,” J. Am. Ceram. Soc., 59, 391–6 (1976).
F.F. Lange, “High Temperature Strength Behavior in Hot-Pressed Si3N4 Evidence for Subcritical Crack Growth,” J. Am. Ceram. Soc. 51, 84–7 (1974).
A.G. Evans, “High Temperature Slow Crack Growth in Ceramic Materials,” pp. 373–96, in: Ceramics for High Performance Applications, Vol. I, eds. J.J. Burke, A.E. Gorum, and R.N. Katz, Brook Hill Pub. Co., Chestnut Hill, MA (1974).
K. Jakus and J.E. Ritter, Jr., “Static Fatigue of Si3N4,” J. Am. Ceram. Soc, 61, 274–5 (1978).
R.K. Govila, K.R. Kinoman, and P. Beardsmore, “Phenomenology of Fracture in Hot-Pressed Silicon Nitride,” J. Mat. Sci., 14, 1095–1102 (1979).
A.G. Evans and S.M. Wiederhorn, “Crack Propagation in Silicon Nitride at Elevated Temperatures,” J. Mat. Sci., 9, 270–8 (1974).
D.W. Richerson and T.M. Yonushonis, “Environmental Effects in the Strength of Silicon Nitride Materials,” pp. 247-71, in: Proceedings of the 1977 DARP/NAVSEA Ceramic Gas Turbine Demonstration Engine, eds. J.W. Fairbanks and R.W. Rice, Metal and Ceramics Information Center Report MCIC-78-36, Batelle Columbus Laboratories, Columbus, OH (1978).
R.W. Rice, S.W. Freiman, and J.J. Mecholsky, “Fracture Sources in Si3N4 and SiC,” pp. 665-88 in ref. 7.
S.W. Freiman, A. Williams, J.J. Mecholsky, and R.W. Rice, “Fracture of Si3N4, and SiC,” pp. 824–34, in: Ceramic Micro structures’ 76, eds. R.M. Fulrath and J.A. Pask, Westview Press, Boulder, Colo. (1977).
S.W. Freiman, J.J. Mecholsky, W.J. McDonough, and R.W. Rice, “Effects of Oxidation in the Room Temperature Strength of Hot-Pressed Si3N4-MgO and Si3N4-ZO2,” pp. 1069–76, in: Ceramics for High Performance Applications, Vol. II, eds. J.J. Burke, E.M. Lenoe, and R.N. Katz, Brook Hill Publishing Co., Chestnut Hill, MA (1978).
S.M. Wiederhorn and N.J. Tighe, “Proof Testing a Hot-Pressed Silicon Nitride,” J. Mat. Sci., 13, 1781–93 (1978).
J.E. Ritter, Jr., “Engineering Design and Fatigue Failure of Brittle Materials,” pp. 667–86, in: Fracture Mechanics of Ceramics, Vol. IV, ed. R.C. Brandt, D.P.H. Hasselman, and F.F. Lange, Plenum Press, N.Y. (1978).
F.F. Lange, “Non-Elastic Deformation of Polycrystals with a Liquid Boundary Phase,” pp. 361–81, in: Deformation of Ceramic Materials, eds. R.C. Bradt and R.E. Tressler, Plenum Press, N.Y. (1975).
J.E. Ritter, Jr., S.M. Wiederhorn, N.J. Tighe, and E.R. Fuller, Jr., “Application of Fracture Mechanics in Assuring Against Fatigue Failure of Ceramic Components,” to be published in Ceramics for High Performance Applications, Vol. III, Reliability, (1980).
D.D. Cubicciotti, R.L. Jones, K.H. Lau, and D. J. Rowcliffe, “High Temperature Oxidation and Mechanical Properties of Silicon Nitride,” Interim. Scientific Report 5522-2, Nov. 15, 1978. Prepared for Air Force of Scientific Research/NE, SRI International.
J.E. Ritter, Jr., N. Bandyopadhyay and K. Jakus, “Statistical Reproducibility of the Dynamic and Static Fatigue Experiments,” to be published in J. Am. Ceram. Soc. (1980).
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© 1981 Plenum Press, New York
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Jakus, K., Ritter, J.E., Weinraub, W., Drooks, W.S. (1981). Effects of Preoxidation on the Strength and Fatigue of Hot-Pressed Silicon Nitride. In: Pask, J., Evans, A. (eds) Surfaces and Interfaces in Ceramic and Ceramic — Metal Systems. Materials Science Research, vol 14. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-3947-2_60
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DOI: https://doi.org/10.1007/978-1-4684-3947-2_60
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