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http://hdl.handle.net/11375/18764
Title: | A Study of Self and Solute Diffusion in Pure Zirconium and Dilute Zirconium-Cobalt Alloys |
Authors: | Kidson, Geoffrey |
Advisor: | Kirkaldy, J. S. |
Department: | Metallurgy |
Keywords: | diffusion;zirconium alloys;pure zirconium;cobalt |
Publication Date: | May-1968 |
Abstract: | <p> The diffusion coefficient of Co has been measured as a function of temperature in the body-centered-cubic phase of 99.99% zirconium. The diffusion rates are extraordinarily large, and follow the relation D = [3.26 ± 2.77] x 10^(-3) exp -(21,820 ± 960/RT) cm^2 /sec over the range 900 to 1600°C. </p> <p> The Arrhenius plot has a positive curvature above 1600°C. The influence of cobalt additions on the diffusion of 95 ZR and 60 Co in dilute Zr-Co alloys was studied from 0 -2 at.% cobalt at 933°C. A theoretical model was developed to relate the effect to the solute correlation factor. It is established that diffusion in these systems cannot be accounted for in terms of a vacancy mechanism alone. Other models are discussed. </p> |
URI: | http://hdl.handle.net/11375/18764 |
Appears in Collections: | Open Access Dissertations and Theses |
Files in This Item:
File | Description | Size | Format | |
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Kidson_Geoffrey_V_1968_Phd.pdf | 8.58 MB | Adobe PDF | View/Open |
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