INTERSTITIAL DIFFUSION OF COPPER AND SILVER IN LEAD

Abstract

The diffusivities, D, of copper and silver in high purity lead have been measured by a radioactive tracer technique. The results, in combination with those of Seith and Keil and Ascoli et al., show that the rates of diffusion of the noble metals in lead are several orders of magnitude greater than the self diffusion rate of lead, D sub Pb. We have found that D sub Pb is not measurably affected by the dissolution of either gold, in agreement with Seith and Keil, or of copper. The results indicate that neither the vacancy, interstitialcy nor exchange mechanisms are predominant in the diffusion of these solutes. It is concluded that the noble metals are dissolved in lead at least partially in the interstitial state and that they diffuse almost wholly by an interstitial mechanism.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1965
Accession Number
AD0630459

Entities

People

  • B. F. Dyson
  • D. Turnbull
  • T. Anthony

Organizations

  • Harvard University

Tags

Communities of Interest

  • Air Platforms
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Agreements
  • Alloys
  • Annealing
  • Boundaries
  • Coefficients
  • Crystal Structure
  • Crystals
  • Diffusion Coefficient
  • Diffusivity
  • Equations
  • Gaussian Distributions
  • Geometry
  • Grain Boundaries
  • Oxide Films
  • Polycrystals
  • Single Crystals
  • Solutes

Readers

  • Combustion science or combustion engineering.
  • Immunology
  • Powder metallurgy of Titanium alloys.