[en] Electronic structures of the rare earth intermetallics YRh, YMg, GdRh and GdMg were calculated using the full potential LAPW method at LDA approximation. The crystal field splittings of RE³⁺ energy levels were obtained from the aspherical components of the self-consistent potential. Our method is shown to describe the trends in experimental values of the crystal field parameters for RERh and REMg systems correctly. (orig.)

[en] Solid solution hardening is sought and observed in two B2(cP2) CsCl and two C15(cF24) Cu₂Mg type structures. New data are presented for the high-temperature compounds AlCo, AlRu, and Cr₂Zr; prior data of Livingston on Cu₂Mg are analyzed. From lattice parameters and specific gravities, cell occupancy numbers have been measured and used to infer likely defect types and concentrations. The effects of constitutional defects in binary compounds correlate with traditional substitutional solution hardening from elastic interactions due to size differences and modulus differences. The hardening from ternary solutes is similar in magnitude, but the defect structures are complicated and not yet adequately understood

[en] This book contains specifications for nickel and nickel alloys, including pipe and tube, plate, sheet and strip, rod, bar and wires; other nonferrous metals and alloys, including cadmium, copper, gold, hafnium, iridium, lead, lithium, palladium, platinum, rhodium, ruthenium, silver, tin and zinc; and reactive and refractory metals and alloys: molybdendum, niobium, tantalum, titanium, and zirconium

[en] A comparison of thoriated iridium, thoriated tungsten and tungsten filaments in a low energy, high resolution electron gun is investigated by the direct measurement of an atomic excitation cross section. (author)

[en] We consider some of the approaches toward obtaining an understanding of alloy phase stability within the context of ab initio density functional theory. We show recent results of calculations, using the concentration functional theory of Gyorffy and Stocks, of the spinodal for Pd_cRh_1-c alloys. We also show results for short-range order diffuse scattering patterns in Al_cAg_1-c which show that the intersite interactions change from clustering to ordering with increasing silver content. The implications of these results for the phase diagram of Al_cAg_1-c alloys and for Guinier-Preston zone formation in aluminium-rich alloys are briefly discussed. In conclusion, some conjectures about what the future might hold regarding first-principles theories of phase stability are made. (author) 22 refs., 4 figs

[en] The electronic and magnetic states in VPt₃ have been investigated by self-consistent band-structure calculations using the linear-muffin-tin-orbitals method. The calculations are performed in both the paramagnetic and spin-polarized configurations for the metastable cubic, as well as the stable tetragonal crystal structure. The results are compared with experiment and other theoretical calculations

[en] Short communication

No abstract available

[en] The surface composition of the (111) surfaces of the binary allows Pd-Cu, Pd-Ag, and Pd-Au have been computed by Monte Carlo computer simulation with the energetics determined by the Embedded Atom Method. Ag and Au are found to segregate to the first atomic layer of their alloys with Pd while for Pd-Cu alloys the degree of segregation is small but occurs mainly on the second atomic plane. The short-range order of the surfaces is addressed by studying the relative abundance of different compositions of nearest neighbor triangles on the (111) surfaces. The presence of triangles containing only atoms of one element is found to be suppressed by the short-range order. This result is shown to follow from the enhancement for these alloys of nearest neighbor pairs of atoms of different types

[en] Self-consistent calculations of electron structure of BeCo, BeNi, BeCu, BePb isostructural (CsCl) compounds are carried out by LMTO method in approximation of atomic spheres. In local approximation of electron density functional state equations derived from the first principles, equilibrium atomic volumes, bulk modulus and formation heats of these compounds as well as of a series of hypothetic Be compounds with other 3d-metals (with CsCl lattices) are obtained. The nature of stability of transition metal beryllides is discussed