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000136158 041__ $$aGerman
000136158 084_0 $$2ZB$$aFHCF - Defect characterization
000136158 084_0 $$2ZB$$aFHCB - X-ray scattering
000136158 084_0 $$2ZB$$aFDFC - Radiation effects in metals, nuclear radiation effects
000136158 0881_ $$aJuel-1650
000136158 088__ $$2JUEL$$aJuel-1650
000136158 1001_ $$aSchönfeld, B.$$b0$$eCorresponding author
000136158 245__ $$aUntersuchung von Frenkeldefekten in tieftemperaturbestrahlten HCP Kristallen mit Hilfe der diffusen Röntgenstreuung$$h[E-Book]
000136158 260__ $$aJülich$$bKernforschungsanlage Jülich$$c1980
000136158 300__ $$a88 S.
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000136158 4900_ $$0PERI:(DE-600)2414853-2$$aBerichte der Kernforschungsanlage Jülich$$v1650
000136158 500__ $$aRecord converted from JUWEL: 18.07.2013
000136158 520__ $$aSingle crystals of 3 hexagonal metals (Zn, Cd, Mg) were irradiated at 4.5K with 3MeV electrons up to doses of $\sim 10^{19}$ $e^{-}$/cm$^{2}$. The irradiation induced defects were investigated by measurements of the Huang diffuse scattering of X-rays, the lattice parameter change and the electrical resistivity change. Only for Zn a random distribution of single interstitial atoms (S.I.A.) and vacancies was found. The S.I.A. was characterized by a large relaxation volume of (3.6±0.7) atomic volumes and a strong anisotropy of the defect displacement field. Consistent with a dumbbell configuration of the S.I.A. the large displacement was along the c-axis. The contribution of a Frenkel defect to the electrical resistivity change was $\rho_{F}$ = (15.3±5.7) $\mu \Omega$cm/at%. For Cd interstitial agglomerates of <10 interstitials were found. Their size increased with the irradiation dose. This indicated interstitial mobility at the irradiation temperature. For Mg interstitial agglomerates of 2-3 interstitials were observed. It was shown, that these agglomerates were formed by interstitial migration during irradiation, similar to Cd. In contrast to Cd, no dose dependence of their size was found. This unique behaviour was tentatively explained by the existence of a nucleation barrier. During thermal annealing in stage II small interstitial agglomerates of ~10 interstitials were found for all 3 metals. In the case of Zn and Cd (c/a $\approx$ 1.85) they seem to nucleate and grow on the basal plane, in the case of Mg (c/a $\approx$ 1.6) however, on prismatic planes.
000136158 540__ $$aNeither this book nor any part of it may be reproduced or transmitted in any form or by any  means, electronic or mechanical, including photocopying, microfilming, and recording, or by any information storage and retrieval  system, without permission in writing from the publisher.
000136158 653__ $$afrenkel defect : hcp metal : diffuse x ray scattering
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000136158 9201_ $$0I:(DE-Juel1)VDB241$$kIFF$$lInstitut für Festkörperforschung$$x0
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