Quenching and annealing of lattice vacancies in pure lead
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1976_knodle |
| Title: | Quenching and annealing of lattice vacancies in pure lead |
| Author(s): | Knodle, Walter St. Clare |
| Doctoral Committee Chair(s): | Koehler, J. S. |
| Department / Program: | Physics |
| Discipline: | Physics |
| Degree: | Ph.D. |
| Genre: | Dissertation |
| Subject(s): |
lattice vacancie
pure lead quenching annealing low-pressure helium atmosphere |
| Abstract: | Lead (99.9999% pure by weight) wires were quenched.in 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 |
| Type: | Text |
| Language: | English |
| URI: | http://hdl.handle.net/2142/25665 |
| Rights Information: | 1976 Walter St. Clare Knodle III |
| Date Available in IDEALS: | 2011-07-05 |
| Identifier in Online Catalog: | 2448729 |
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Graduate Theses and Dissertations at Illinois
Graduate Theses and Dissertations at Illinois -
Dissertations and Theses - Physics
Dissertations in Physics
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