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Title:Quenching and annealing of lattice vacancies in pure lead
Author(s):Knodle, Walter St. Clare
Doctoral Committee Chair(s):Koehler, James S.
Department / Program:Physics
Subject(s):lattice vacancie
pure lead
low-pressure helium atmosphere
Abstract:Lead (99.9999% pure by weight) wires were a low temperature (s35 K), low-pressure (10-100 bars absolute) helium atmosphere. Initial quench rates were between 1 and 3X10 4 °C/sec. The formation energy for a lattice vacancy was determined to be 0.54+0.02 eV and the resistivity for one atomic percent vacancies was found to be 2.8+0.1 po-cm. Annealing studies indicated that the vacancy behavior of lead is similar to other face-centered-cubic metals. Two annealing stages are observed. One stage near 170 K is attributed to the migration of vacancy type defects to clusters. A second stage at 330 K is associated with the dissolution of vacancy clusters and vacancy loops. Slope change measurements made at 140 K and 150 K indicate a divacancy migration energy of 0.45±0.04 eVe Anneals at 269 K and 322 K indicate a strong influence from impurities. A divacancy binding energy of 0.23+0.03eV is found. Good agreement with defect equilibrium concentration measurements and self-diffusion data is achieved.
Issue Date:1976
Genre:Dissertation / Thesis
Rights Information:1976 Walter St. Clare Knodle III
Date Available in IDEALS:2011-07-05
Identifier in Online Catalog:2448729

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