Dependence of the Elastic Moduli of Skutterudites on Density and Temperature

摘要

The dependency of Young's and shear modulus on relative density and temperature was determined for three series of skutterudites: p-type Mm_yFe_3CoSb_(12) (y = 0.70, 0.80), p-type DD_yFe_3CoSb_(12) (y = 0.65, 0.68) and n-type Sr_(0.07)Ba_(0.07)Yb_(0.07)Co_4Sb_(12). For all three groups of materials the dependency of Young's modulus, E, on the density and temperature is linear: E(d) = 4.1(1)×d - 268(3) GPa (d is the relative density in %), AE/AT = 0.20(1) GPa/K, thus allowing extrapolation of E as a function of temperature and towards 100% density.