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Enhanced Thermal Stress Resistance of Structural Ceramics with Thermal Conductivity Gradient

1978; Wiley; Volume: 61; Issue: 1-2 Linguagem: Inglês

10.1111/j.1151-2916.1978.tb09228.x

1551-2916

D. P. H. Hasselman, G.E. Youngblood,

Advanced ceramic materials synthesis

The hypothesis is presented that the maximum tensile thermal stresses in brittle ceramics can be reduced significantly by a redistribution of the temperature profile using a spatially varying thermal conductivity. On the basis of a hollow circular cylinder subjected to radially inward or outward steady‐state heat flow, it is shown that such a spatially varying thermal conductivity can lead to significant decreases in magnitude of the maximum tensile thermal stress. Possible techniques of creating such thermal conductivity variations are discussed briefly.