Aerospace applications which take advantage of the refractory nature of ceramic materials also impose upon them severe conditions of thermal shock. The severity of this thermal environment exceeds that for which it is possible to prevent crack nucleation; therefore, the design of thermal-shock-resistant materials is based on the concept of preventing crack propagation. More explicitly, composite materials with either carbide or oxide matrices were developed with the capability of sustaining thermal strains without generating the thermal stresses that could lead to catastrophic failure. Thermal simulation tests revealed a resistance to thermal shock far superior to that which could be realized by more conventional ceramic materials. Improved quality is related to the role of the individual phases, within the microstructures.
KeywordsThermal Shock Thermal Strain Thermal Shock Resistance Graphite Flake Beryllium Oxide
Unable to display preview. Download preview PDF.
- 4.D. P. H. Hasselman and P. T, B. Shaffer, “Factors Affecting Thermal Shock Resistance of Polyphase Ceramic Bodies,” WADD-TR-60-749 (Part 11 ), April 1962.Google Scholar
- 5.E. G. Kendall, R. D. Carnahan, and E. L. Foster, p. 240 in Trans. Vac. MeU Conf. Pap., 8th, New York (Ed. L. M. Bianchi ), (1966).Google Scholar
- 7.R. C. Rossi and R. D. Carnahan, Ch. 29 in Ceramic Microstructures. Edited by R. M. Fulrath and J. A. Pask, John Wiley and Sons, Inc. N. Y. (1968).Google Scholar
- 10.J. R. Bohn, K. R. King, C. H. Ernst, and K. R, Janowski, “Nonsteady-State Thermal Stress Behavior of Refractory Materials,” AFML-TR-67-315 (Nov. 1967).Google Scholar
- 11.E. G. Kendall, J. I. Slaughter, and W. C. Riley, AIAA J. 4 (5) 900-905-(1966).Google Scholar
- 12.E. G. Kendall, R. D. Carnahan, and R. C. Rossi, Space/Aeronautics 47 (1) 132 (1967).Google Scholar
- 13.R. C. Rossi, Amer. Ceram. Soc. Bull. 48 (7) 736 (1969).Google Scholar