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X-Ray Methods for Detection of Lattice Imperfections in Crystals

Published online by Cambridge University Press:  06 March 2019

Volkmar Gerold
Volkmar Gerold*
Affiliation:
Institut fuer Metallphysik am Max Planck Institut fuer Metallforschung, Stuttgart, Germany
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Abstract

Two methods are described for the detection of lattice imperfections of different kinds.

  • 1. Imperfections in Solid Solutions. Normal diffraction methods with monochromatized X-rays are applied to single crystals of supersaturated solid solutions, where preprecipitation states occur. The calculated intensity distribution for a one-dimensional model of clustering shows the influence of atomic distribution and lattice distortion. Results are given on the structure of clusters in aluminum-rich alloys.

  • 2. Detection of Dislocations in Nearly Ideal Crystals. A method first given by Barth and Hosemann is improved and used for the detection of dislocations in crystals of germanium. Use is made of the anomalously low absorption coefficient existing for X-rays which make the Bragg angle with a certain set of lattice planes going through a perfect crystal. The absorption is increased at points where the lattice planes are distorted by a dislocation line, and shadows from these lines can be seen on a photographic plate behind the crystal. The method gives information on the spatial distribution of dislocation lines and the direction of the Burgers vectors,

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 3: Eighth Annual Conference on Applications of X-ray Analysis, August 12-14, 1959 , 1959 , pp. 289 - 313
Copyright
Copyright © International Centre for Diffraction Data 1959

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References

1 Guinier, A., Nature Vol. 142, 1938, p. 569.Google Scholar
2 Preston, G. D., Proc. Roy. Soc. Vol. A 167, 1938, p. 526.Google Scholar
3 Bradley, A. J., Proc. Phys, Soc. Vol. 52, 1940, p. 80.Google Scholar
4 Daniel, V. and Upson, H., Proc. Roy. Soc. Vol. A181, 1943, p, 368 and Vol. A 182, 1944, p. 378.Google Scholar
5 Hargreaves, M. E., Acta Cryst. Vol. 4, 1951, p. 301.Google Scholar
6 Tiedema, T. J., Bouman, J., and Burgers, W. G., Acta Met. Vol. 5, 1957, p. 534.Google Scholar
7 Gerold, V., Z. Metallkde. Vol. 45, 1954, p. 599.Google Scholar
8 Toman, K., Acta Cryst. Vol. 10, 1957, p. 187.Google Scholar
9 Gerold, V., Acta Cryst. Vol. 11, 1958, p. 230.Google Scholar
10 Toman, K., private communication, 1959.Google Scholar
11 Belbeoch, B. and Guinier, A., Acta Met. Vol. 3, 1955, p. 370.Google Scholar
12 Gerold, V., Z. Metallkde. Vol. 46, 1955, p. 623.Google Scholar
13 Schmalzried, H. and Gerold, V., Z. Metallkde. Vol. 49, 1958, p. 291.Google Scholar
14 Gerold, V. and Haberkorn, H., Z. Metallkde. Vol. 49, 1959, in press.Google Scholar
15For details see, for example, Cottrell, Dislocations and Plastic Flow in Crystals, Oxford, Clarendon Press (1953).Google Scholar
16 Newkirk, J. B., Phys. Rev, Vol. 110, 1958, p. 1465.Google Scholar
17 Bonse, U., Z. Physik Vol, 153, 1958, p. 278.Google Scholar
18 Lang, A. R., Acta Cryst. Vol. 12, 1959, p. 249.Google Scholar
19 Borrinann, G., Hartwig, W., and Irmler, H., Z. Naturforschg. Vol. 13a, 1958, p. 423.Google Scholar
20 Barth, H. and Hosemann, R., Z. Naturforschg. Vol. 13a, 1958, p. 792.Google Scholar
21 Gerold, V. and Meier, F., Z. Physik Vol. 155, 1959, p. 387.Google Scholar
22 Borrmann, G.. Hildebrand, G., and Wagner, H.. Z. Physik Vol. 142, 1955, p. 406.Google Scholar