Thermodynamics of Alloys

Abstract

Tin solution calorimetry has been used to measure the heats of formation of selected face-centered cubic palladium-rich solid solutions of the palladium-silver-tin system. The results show that alloys of constant electron concentration are characterised by heats of formation which vary almost exactly linearly between the values for the terminal binary alloys. The results are discussed in relation to the possible contributions associated with electronic energy and ion-ion interaction effects. Lattice parameters of the alloys have been measured and a linear variation of these is also observed. The technique based on the precipitation of an alloy phase from liquid tin has been used for the study of the aluminides Pt2Al3(Ni2Al3-type), RhAl (CsCl-type) and NiAl (CsCl-type), while normal solution calorimetry has been used to investigate the compound PdGa (FeSi-type). Values obtained for the heats of formation were found. These and previously determined heats of formation of related compounds are compared and trends and influences in the heats of formation of transition metal aluminides and palladium - Group IIIB compounds are discussed.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1971
Accession Number
AD0722799

Entities

People

  • A. W. Bryant
  • D. T. Underhill
  • John N. Pratt

Organizations

  • University of Birmingham

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Binary Alloys
  • Crystal Structure
  • Elements
  • Energy Bands
  • Heat Of Formation
  • Heat Of Solution
  • Heat Treatment
  • Ion Ion Interactions
  • Materials
  • Measurement
  • Metals
  • Physical Metallurgy
  • Solid Solutions
  • Thermodynamic Properties
  • Thermodynamics
  • Transition Metals
  • X Rays

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Microelectronics