Theory of ordering transformations in metals and minerals Metadata

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Title

  • Main Title Theory of ordering transformations in metals and minerals

Creator

  • Author: Lindsey, Timothy Francis
    Creator Type: Personal
    Creator Info: California Univ., Berkeley, CA (United States). Dept. of Materials Science and Mineral Engineering Lawrence Berkeley Lab., CA (United States)

Contributor

  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization
    Contributor Info: DOE; USDOE, Washington, DC (United States)

Publisher

  • Name: Lawrence Berkeley Laboratory
    Place of Publication: Berkeley, California

Date

  • Creation: 1991-07-01

Language

  • English

Description

  • Content Description: This dissertation presents an investigation of ordering in FCC based systems using the pair potential approximation in the ground state and mean field limits. The theoretical approach is used to explain the occurrence of observed equilibrium phases and characteristics of thermodynamic instabilities, in particular, spinodal ordering and decomposition. It is shown that the stability of non-integer domain sizes in long period superstructures such as Al{sub 3}Ti and Ag{sub 3}Mg may result from the tendency of a system to reduce the number of non-dominant ordering waves, thus producing domain sizes that have rational fraction form n/m. This conclusion is used to explain the domain size stability with respect to variations in temperature and electron concentration. The cation ordering in the precipitate phases in calcite and dolomite is analyzed by analogy with ordering in FCC based metals. The ordered phases in calcite and dolomite are shown to be consistent with pair potential minima at {l brace}100{r brace} and {l brace}1/2, 1/2, 1/2{r brace} positions in reciprocal space respectively. 32 refs., 6 figs.
  • Physical Description: 107 pages

Subject

  • Keyword: Alloys
  • Keyword: Physical Properties
  • Keyword: Crystal Structure
  • STI Subject Categories: 360602 -- Other Materials-- Structure & Phase Studies
  • Keyword: Phase Studies
  • STI Subject Categories: 36 Materials Science
  • Keyword: Fcc Lattices
  • Keyword: Lithium Alloys
  • Keyword: Cubic Lattices
  • Keyword: Aluminium Alloys
  • Keyword: Phase Transformations
  • Keyword: Dolomite
  • Keyword: Carbonate Minerals
  • Keyword: Thermodynamic Properties
  • Keyword: Precipitation
  • Keyword: Minerals
  • Keyword: Crystal Lattices
  • Keyword: Separation Processes 360102* -- Metals & Alloys-- Structure & Phase Studies
  • Keyword: Calcite

Source

  • Other Information: Thesis (Ph.D.)

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Thesis or Dissertation

Format

  • Text

Identifier

  • Other: DE92000855
  • Report No.: LBL-31057
  • Grant Number: AC03-76SF00098
  • DOI: 10.2172/5173755
  • Office of Scientific & Technical Information Report Number: 5173755
  • Archival Resource Key: ark:/67531/metadc1056372

Degree

  • Degree Level: Doctoral

Note

  • Display Note: OSTI; NTIS; GPO Dep.
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