Elastic moduli of polycrystalline ZrCo as a function of temperature

The polycrystalline elastic moduli of the intermetallic compound ZrCo have been measured over the temperature range of 3-410 K. The temperature dependence of the moduli resembles that of ordinary metals; the moduli approach zero temperature with zero slope, but decrease monotonically with increasing temperature at higher temperatures. The 296 K values of the bulk, shear, and Young's moduli are, respectively, 140, 49.2, and 132 GPa. Poisson's ratio is almost temperature-independent increasing from 0.338 at low temperatures to 0.343 at 410 K. The acoustic contribution to the low temperature specific heat, calculated from the elastic moduli measured at 3 K, is 9.32X10(-5) J/(mol K-4). The corresponding Debye temperature is 347 K. (C) 2002 Elsevier Science B.V. All rights reserved.