On the stability of dislocations in metal whiskers

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Abstract
The possibility of thermally activated slip of dislocations out of metal whiskers is considered. Such an event provides a mechanism for the cessation of whisker growth. It is found that a single axial dislocation will be in unstable elastic equilibrium if it has an edge component with respect to the whisker axis greater than a critical amount. Metastable dislocations with edge components less than this critical amount have an expectation time for slip out of the whisker which is dependent on whisker radius, temperature, and the elastic properties of the whisker material. The effects on whisker morphology predicted by this mechanism are discussed.
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