THERMAL DIFFUSION OF SUBSTITUTIONAL IMPURITIES IN COPPER, COLD AND SILVER,
Abstract
An investigation of impurity thermal diffusion (Soret effect) in dilute solid alloys of Co, Ge, Ag, and Au in copper, Ag and Te in gold, and Au in silver was carried out using radioactive tra cer techniques. An investigation of self-diffu sion of pure copper and gold in a temperature gradient was carried out using (surface) marker movement techniques. The tracer experiments showed that a measurable amount of impurity seg regation occurred in all systems except Au in Ag. Some qualitative and semi-quantitative re lationships between impurity thermal diffusion and valence and size effects were established. In addition, quantitative values of the pure metal and impurity heats of transport were ob tained. These heats are about equal to the ac tivation energy for migration in each case. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1963
- Accession Number
- AD0418609
Entities
People
- D. Jaffe
- P.g. Shewmon
Organizations
- Carnegie Institute of Technology