Accession Number:

AD0269595

Title:

THERMODYNAMICS OF INTERSTITIAL SOLID SOLUTIONS

Descriptive Note:

Corporate Author:

MANLABS INC CAMBRIDGE MASS

Personal Author(s):

Report Date:

1961-10-01

Pagination or Media Count:

1.0

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

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE