Letter | Published:

Glide Bands in Silver Chloride

Nature volume 162, pages 299300 (21 August 1948) | Download Citation

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Abstract

As already reported1, polycrystalline sheets of silver chloride show both sharp and diffuse bands of birefringence after plastic deformation. In addition to this effect, plastic deformation causes fine lines to appear on the surfaces of the sheets; these are similar to the glide lines seen on metallic surfaces which have been polished and then deformed. Examination under the microscope with oblique illumination makes it clear that they are steps. This conclusion is confirmed by using the ‘shadow-casting' technique developed in connexion with electron microscopy. Measurements made with an optical microscope of the widths of the shadows cast by the steps show that the heights of the most prominent steps are of the order of 4000 A. It would appear, therefore, that the principal, and perhaps the only, mechanism of plastic deformation in silver chloride is glide. In this respect silver chloride differs from sodium chloride, which at room temperature becomes deformed mainly or entirely by kinking2,3.

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References

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    , Nature, 161, 367 (1948).

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    , and , Phys. Z. der Sowjetunion, 12, 7 (1937).

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    , Nature, 149, 643 (1942).

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    , and , Proc. Roy. Soc., A, 112, 337 (1926).

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Affiliations

  1. Cavendish Laboratory, Cambridge. April 30.

    • J. F. NYE

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DOI

https://doi.org/10.1038/162299a0

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