Short-range order in amorphous Ni-Zr alloys

Calculation of short range order in Ni–Rh, Ni–Pd and Cu–Rh alloys

Transition metal model pseudopotential (TMMP) technique has been applied to study the short range order (SRO) in nickel alloys Ni100–x–Rhx and Ni100–x–Pdx and a copper alloy Cu100–x–Rhx (x = 2, 5, 8, 11 at. %). All these transition metal alloys form fcc solid solutions for the chosen compositions. The static electrical permittivity ε(q) was taken from the Hubbard–Sham model and/or Geldart–Vosko...

Hydrogen diffusion in Zr-Pd amorphous alloys

Nuclear Magnetic Relaxation measurements of the dipolar relaxation rate due to hydrogen diffusion in Zr-Pd amorphous alloy~ have been conducted and the results interpreted in terms of the random alloy model. It is found that even though the measured activation

Short-range order of compressed amorphous GeSe2

The structure of amorphous GeSe2 (a-GeSe2) has been studied by means of a combination of two-edges X-ray absorption spectroscopy (XAS) and angle-dispersive X-ray diffraction under pressures up to about 30 GPa. Multiple-edge XAS data-analysis of a-GeSe2 at ambient conditions allowed us to reconstruct and compare the first-neighbor distribution function with previous results obtained by neutron d...

COMPARISON OF THE SHORT-RANGE ORDER OF AMORPHOUS AND CRYSTALLINE (Fe,Ni)B ALLYOS

Dendritic solidification and fragmentation in undercooled Ni–Zr alloys

Kinetics of dendritic solidification and fragmentation of dendritic crystals in undercooled Ni–Zr samples are studied. Using the capacitance roximity sensor technique and a high-speed-camera system, the dendrite growth velocity has been measured as a function of initial undercooling n solidifying droplets processed by the electromagnetic levitation technique. Analyses of solidified droplets giv...