Abstract
A wide variety of ceramic and ceramic composite components must withstand cyclic thermal shock (thermal fatigue), from engine components to mainframe computer memories. Thermal fatigue induced changes in elastic modulus show similar trends for titanium diboride, alumina, SiC whisker reinforced alumina, a SiC fiber reinforced aluminosilicate glass ceramic, and fluoromica platelet/glass ceramic composite. The decrement in the elastic modulus that results from thermal fatigue of each of these materials can be expressed in terms of a single empirical equation. Using a modulus-microcrack damage relationship from the literature and assuming “short crack” fatigue behavior, the form of the modulus decrement equation is obtained. The assumed crack extension rate (short crack behavior) is consistent with crack extension rates obtained by other researchers for the mechanical fatigue of ceramics and ceramic composites.
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Case, E.D., Kim, Y., Lee, W.J. (1993). Cyclic Thermal Shock in SiC Whisker Reinforced Alumina and in Other Ceramic Systems. In: Schneider, G.A., Petzow, G. (eds) Thermal Shock and Thermal Fatigue Behavior of Advanced Ceramics. NATO ASI Series, vol 241. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-8200-1_33
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DOI: https://doi.org/10.1007/978-94-015-8200-1_33
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