Self-diffusion of64Cu in copper single crystals Monovacancy and divacancy contributions
- 1 August 1978
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine A
- Vol. 38 (2) , 157-165
- https://doi.org/10.1080/01418617808239226
Abstract
Self-diffusion of 64Cu in copper single crystals has been measured over the temperature range 737°–1079°C. The curved Arrhenius plot is evaluated together with earlier tracer data according to the least-squares analysis of Morrison (1975), assuming mono-vacancy and divacancy diffusion to be operative. Neglecting possible temperature dependencies of energies and entropies, the diffusion coefficient can be described by the frequency factors D 1V° = 0 ·13+0·08 −0· and D 2V° = 4·6+6 −2·6 cm2 S−1. The respective activation energies are for the monovacancy and divacancy contributions Q 1V = 47·4 ± 0·6 and Q 2V = 57 ± 3 kcal mole−1.Keywords
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