Abstract
The resistance to delayed failure of a lithium aluminosilicate glass‐ceramic was measured by dynamic fatigue experiments on abraded samples in the as‐formed glassy state and after various stages of heat treatment. Heat treatment was varied in a controlled manner to give microstructures of high quartz and keatite with small and large grain size. The glassy state was most susceptible to delayed fatigue, and the keatite state the least. The increase in fatigue resistance of the ceramic phases is attributed to the crystalline structure having a lower reactivity with water.
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