1963•OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information)Requires access
THE JOINT EFFECT OF MERCURY AND IRRADIATION ON THE MECHANICAL PROPERTIES OF ZINC SINGLE CRYSTALS
O. A. Troitskiǐ, V. I. Likhtman
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Abstract
The BETA , alpha , and gamma emitters P/sup 32/, Pu/sup 239/, and Co/ sup 60/ were use d to irradiate samples of single crystals of zinc 10 mnn long and approximates 1 mm in diameter, which were grown by zone melting. After etching the surface with 26% HNO/sub 3/, about 3% wt% of Hg was put on the zinc surface by contact with a HNO/sub 3/ solution containing mercury. Tests on a Polyani instrument (elongation at a constant rate of deformation of approximates 10% min/sup -1/ at 20 and --196 deg C) showed that the amalgamated, zinc single crystals, irradiated for 1550 hours in the alpha , BETA , and gamma irradiators, suffered a significant loss in plasticity and strength. At first, there was a maximum increase in strengih of +35% for a 16 to 18 hour irradiation, and a significant loss in strength and plasticity after 100 hours of irradiation with a 200 mu C source of P/sup 32/. Since the loss in strength and plasticity was even more pronounced on irradiating the amalgamated, zinc single crystals with alpha particles of Pu/sup 239/, it was concluded that the role of surface, structural defects due to irradiation play anmore » important part in the loss of strength and ductility. (TTT)« less