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Kinetics of transformation of metastable silver-copper solid solutions

Citation

Linde, Ronald Keith (1964) Kinetics of transformation of metastable silver-copper solid solutions. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechETD:etd-10172002-121425

Abstract

Metastable solid solutions were obtained at compositions across the entire range from 0 at. % Ag;Cu to 100 at. % Ag;Cu by rapid-quenching from the liquid state. Lattice parameters were measured by x-ray diffraction in Debye-Scherrer powder cameras. The enthalpy of solution of the 75.0 at. % Ag;Cu composition was determined calorimetrically and is discussed in relation to the predictions of existing theories.

The process of transformation of the metastable solid solutions into the equilibrium phases was studied by means of x-ray diffraction intensity measurements, electrical resistance measurements, and optical microscopy. Results are compared with those for an alloy quenched from the solid state at a composition which exists as a solid solution at elevated temperatures. Activation energies were computed and are shown to be compatible with a diffusion controlled growth process in which most of the nuclei are present very early in the process. A model for the transformation process is postulated and discussed in terms of experimental results.

Photographic materials on pages 26, 50, 51, 52, 55, 76, 77, 78, 105, and 107 are essential and will not reproduce clearly on Xerox copies. Photographic copies should be ordered.

Item Type:Thesis (Dissertation (Ph.D.))
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Engineering and Applied Science
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Unknown, Unknown
Thesis Committee:
  • Unknown, Unknown
Defense Date:4 May 1964
Record Number:CaltechETD:etd-10172002-121425
Persistent URL:http://resolver.caltech.edu/CaltechETD:etd-10172002-121425
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:4121
Collection:CaltechTHESIS
Deposited By: Imported from ETD-db
Deposited On:17 Oct 2002
Last Modified:26 Dec 2012 03:05

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