EQUILIBRIUM MEASUREMENTS IN HIGH MELTING MATERIALS.
Technical rept., 1 Apr 68-30 Jun 69,
CINCINNATI UNIV OHIO
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The methods available to determine the specific heat of metals at elevated temperature are reviewed. All methods used give data which agree with each other. The high temperature specific heat for metals can be represented by an equation of the type C sub p 3RF theta sub DT cT dT to the 3rd power between theta sub D, the Debye temperature and the melting point. The rapid rise in specific heat at high temperatures is due to the contribution of anharmonic vibrations to the specific heat and not to the formation of vacancies. The accuracy of 1 in the specific heat data available presently is not sufficient to determine the energy and entropy of formations of vacancies, and their concentration. Author