Accession Number : AD0679205

Title :   DIFFUSION OF CADMIUM IN LEAD.

Descriptive Note : Technical rept.,

Corporate Author : HARVARD UNIV CAMBRIDGE MASS DIV OF ENGINEERING AND APPLIED PHYSICS

Personal Author(s) : Miller,J. Wesley

Report Date : OCT 1968

Pagination or Media Count : 32

Abstract : The diffusivity of cadmium in high purity lead single crystals has been measured from 150C to the melting point using tracer and sectioning techniques. Lead self-diffusivity is enhanced by the addition of cadmium. Comparing the diffusion data for several impurities in lead, it is pointed out that the dominant mechanism of solute diffusion, and hence the diffusion rate as well, is determined primarily by the solute valence. It is then considered that the dominant diffusion mechanism of a particular solute is a natural consequence of its degree of interstitial dissolution, and that solute valence plays a major role in determining the energetics of interstitial dissolution. (Author)

Descriptors :   (*CADMIUM, TRANSPORT PROPERTIES), (*LEAD ALLOYS, SOLID SOLUTIONS), SINGLE CRYSTALS, HIGH TEMPERATURE, SOLVATES, TRACER STUDIES, METALLOGRAPHY, ANNEALING, RADIOACTIVE ISOTOPES

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE