THE LATTICE STABILITY OF METALS. IV. TRANSITION ELEMENTS OF THE SECOND AND THIRD PERIODS

Abstract

The enthalpy and entropy differences between the b.c.c., h.c.p. and f.c.c. structures were estimated for transition elements of the second and third periods. Continuous curves depicting these differences as a function of electron number in the zirconium through cadmium and hafnium through gold series are presented. The difference parameters were used to compute thirty binary phase diagrams between elements in the niobium/tantalum through palladium/platinum groups. These binary diagrams, which are restricted to cases where the end members exhibit differing stable crystal structures and miscibility gaps are absent, were calculated on the basis of ideal liquid, b.c.c., h.c.p. and f.c.c. phases. The latter simplification was chosen in order to afford the clearest possible comparison of computed and observed phase diagrams.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1965
Accession Number
AD0473554

Entities

People

  • Larry Kaufman

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Contracts
  • Crystal Structure
  • Diagrams
  • Enthalpy
  • Free Energy
  • High Pressure
  • Materials
  • Phase Diagrams
  • Phase Transformations
  • Physical Properties
  • Platinum
  • Refractory Metals
  • Ruthenium
  • Tantalum
  • Transition Metals
  • Tungsten

Readers

  • Graph Algorithms and Convex Optimization.
  • Materials Science and Engineering.
  • Surface Engineering/Surface Coating Technology.

Technology Areas

  • Microelectronics