Zusammenhang zwischen strukturellen und thermodynamischen eigenschaften bei phasen der kupferfamilie in den T 10-B 1- und T 10-b 2-systemen

Abstract

The lattice parameters and macroscopic densities were measured in the nickel-rich part of the Ni-Au system. The dependence of the mean atomic volume on the chemical composition was determined for all the miscible T 10-B 1 and T 10-B 2 systems and was analysed in the range of existence of the copper family. With the exception of the Ni-Au system, the partial atomic volumes of the B 1 and B 2 metals in very dilute solutions are independent of the type of T 10 solvent. For dilute solutions, linear correlations were found between the difference of the partial molar atomic volume of the B and T 10 metals and the partial molar enthalpy of formation for isovalent systems. Some relationship between the effective atomic radii of the B 1, B 2 and B 3 metals and the Pauling metallic and covalent radii was observed.