The effect of room-temperature erosion on material removal from and strength properties of soda-lime glass and sintered alumina was determined. The results were compared to the elastidplastic indentation fracture model. The dependence of erosion rate and strength of soda-lime glass on the kinetic energy of the impacting particles was in good agreement with predictions. The lack of agreement between theory and experiment for sintered alumina was attributed to microstructural aspects of the erosion damage that are not modeled by indentation fracture.

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Thermal profiles determined on instrumented silicon carbide radiant tubes were used to quantify thermoelastic stress distributions during steady-state operation at temperatures up to 1260°C. Tube failure probabilities were calculated using finite-element analysis incorporating Weibull strength data compiled on tubular sections at high temperature. Results indicate the significance of the axial and radial temperature gradients on the thermoelastic stresses and failure probabilities as well as the viability of a reaction bonded silicon carbide material for radiant tube applications up to 1260°C.