Effective oxidative transformation of toluene into valuable products was achieved under solvent-free reaction conditions with as-prepared nickel nanoparticles as heterogeneous catalysts in liquid phase. The crystalline structure and size the were confirmed by X-ray diffractometry (XRD) dynamic light scattering (DLS). catalytic implications different forms (face-centred cubic: fcc; hexagonal clo...

Niobium is one of the major alloying elements, among the refractory elements, contributing to the strengthening of superalloys. Consequently, data about its behavior and its migration mechanism in fcc-Ni are essential knowledge to understand and control the strengthening in such alloys. We present in this work Nb interactions, solubility and diffusion in Ni performed by using the GGA approximat...

In order to improve the added value of iron oxide scale and reduce manufacturing cost porous stainless steel, steel rolling as an iron-containing raw material was used prepare 316 by high-temperature sintering under vacuum conditions, while carbon a reducing agent pore-forming agent, necessary metal powders were added. our work, specific reduction system confirmed, including temperature, time, ...

Iron-nickel (Fe-Ni) alloy nanoribbons were reported for the first time by deoxidizing NiFe2O4 nanoribbons, which were synthesized through a handy route of electrospinning followed by air-annealing at 450 °C, in hydrogen (H2) at different temperatures. It was demonstrated that the phase configurations, microstructures and magnetic properties of the as-deoxidized samples closely depended upon the...

Using electron energy loss spectroscopy, we have probed the spin waves of fcc(100) cobalt after capping with 1–3 atom layers of pseudomorphic nickel or up to 12 atom layers of copper. The intensity decay of the spin wave signal is quantitatively described by the mean-free path of the incident and the scattered electron within the capping layer. The observed spin waves are therefore localized at...

Structural stability and energetics of nickel clusters, NiN (N = 3−459), have been investigated by molecular-dynamics simulations. A size-dependent empirical model potential energy function has been used in the simulations. Stable structures of the microclusters with sizes N = 3 − 55 and clusters generated from fcc crystal structure with sizes N = 79 − 459 have been determined by molecular-dyna...

Nickel is widely used as a fcc model material to obtain insight into fundamental mechanisms of radiation damage. This work presents irradiation high-purity nickel using self-ions at 450 °C and fine analysis dislocation loops in specimens prepared by Focus Ion Beam Transmission Electron Microscopy. For the first time our knowledge, an inversion loop nature (vacancy-type irradiated zones v.s. int...

A comparison of the activity mono- and bimetallic Ni-Cr/C catalysts deposited on a carbon carrier (sibunite) in bicyclohexyl dehydrogenation reaction as stage hydrogen evolution storage systems is carried out. The interaction Ni Cr supported onto carrier—sibunite NiCr affects change parameters crystal lattice nickel, compared with FCC Ni, shown by methods XPS, TPR, XRD, high-resolution TEM elec...

In the case where an interstitial atom is located in a close-packed atomic row of crystal lattice, it called crowdion. Crowdions play important role processes mass and energy transfer resulting from irradiation, severe plastic deformation, ion implantation, plasma laser processing, etc. this work, supersonic N-crowdions (N=1, 2) fcc lattices lead nickel are studied by method molecular dynamics....