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Polygonization in Bent Zinc Crystals

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2 Author(s)
Sinha, P.P. ; Department of Mining and Metallurgical Engineering, University of Illinois, Urbana, Illinois ; Beck, Paul A.

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High‐purity zinc crystals were grown from the melt by the soft mold technique, and bent in such a way that [01¯10] was parallel to the bending axis and the [211¯0] slip direction enclosed approximately 45° with the bending radius. A dislocation etching technique was developed, which reveals the edge dislocations introduced on bending, without the necessity of decoration. It was found that crystals bent either at room temperature or at liquid nitrogen temperature had approximately two‐thirds of the edge dislocations arranged in low‐angle tilt boundary segments. The fact that no observable change occurred in the dislocation structure on annealing up to 225°C for 5000 min suggests that the observed low‐angle boundaries were formed directly on bending rather than by a thermally activated polygonization process, which might have been thought to take place at room temperature in the interval between bending and etching.

Published in:

Journal of Applied Physics  (Volume:32 ,  Issue: 7 )

Date of Publication:

Jul 1961

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