The Variation of the Elastic Constants of Crystalline Aluminum with Temperature between 63°K and 773°K

Abstract

The composite piezoelectric oscillator is employed to measure the adiabatic elastic moduli of crystalline aluminum over the temperature interval 63\ifmmode^\circ\else\textdegree\fi{}K to 773\ifmmode^\circ\else\textdegree\fi{}K. The data permit a valid extrapolation to 0\ifmmode^\circ\else\textdegree\fi{}K. The Debye characteristic temperature of aluminum at 0\ifmmode^\circ\else\textdegree\fi{}K, computed with these data, is 439\ifmmode^\circ\else\textdegree\fi{}K. Various novel procedures designed to facilitate the use of the method are described.