THERMODYNAMICS OF INTERSTITIAL SOLID SOLUTIONS

Abstract

The thermodynamics of interstitial solid solutions in terms of the contributions of positional and vibrational entropy and zero point enthalpy was considered in detail for ideal and restricted interstitial solutions. The results were applied to calculation of phase equilibria in interstitial iron-carbon alloys at one atmosphere and high pressure. Comparison with observations on kinetics of the bainite reaction and high pressure equilibria action yields good agreement. A method evolved for computing the entropy of solutions and intermetallic compounds from 0 K to the melting point was applied to 35 NaCl type compounds (including high melting carbides, oxides and nitrides). These computations compare favorably with experimental data. A study of the interstitial solutions in the titanium-oxygen system indicates that the high temperature stability of the h.c.p. solution is due to the enthalpy of formation. (Author)

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1961
Accession Number
AD0269595

Entities

People

  • Larry Kaufman

Tags

DTIC Thesaurus Topics

  • Alloys
  • Carbon Alloys
  • Enthalpy
  • Entropy
  • Experimental Data
  • Heat Of Formation
  • High Pressure
  • High Temperature
  • Intermetallic Compounds
  • Melting
  • Melting Point
  • Solid Solutions
  • Thermodynamic Properties
  • Thermodynamics

Fields of Study

  • Materials science

Readers

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