Evidence for microporosity and dislocations in Pb(Cd) alloys from positron annihilation studies |
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| Authors: | C-K Hu S Berko GR Gruzalski D Turnbull |
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| Institution: | Department of Physics Brandeis University, Waltham, Massachusetts 02154, USA;Division of Applied Sciences Harvard University, Cambridge, Massachusetts 02138, USA |
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| Abstract: | The temperature dependence of lineshape parameters obtained from Doppler profile measurements (from 7 to 350 K) is presented for rolled and unrolled Pb, Pb(Cd), and Pb(Tl) alloys. It is demonstrated that positrons can be used to detect microporosity and dislocations in Pb(Cd) alloys. The porosity is greatly reduced by rolling. Positron trapping by the Pb(Cd) alloys in the as-worked state is attributable to dislocations. |
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