We have investigated the vibrational anharmonicity and quantum effects in the Invar alloy Fe64.6Ni35.4 which shows anomalously small thermal expansion. We have performed Fe and Ni K-edge EXAFS spectroscopic measurements and computational simulations based on the path-integral effective-classical-potential theory. The first nearest-neighbor (NN) shells around Fe showed almost no thermal expansio...

Ethanol has been used as a renewable hydrogen-donor in the conversion of lignin model molecule subcritical conditions. Noble metal-free porous mixed oxides, obtained by activation Cu−Ni−Al and Cu−Ni−Fe layered double hydroxide (LDH) precursors, have heterogeneous catalysts for Meerwein-Ponndorf-Verley (MPV) hydrogen transfer further hydrogenation ethanol dehydrogenation products. Both Cu/(Cu+Ni...

The most important examples of magmatic ore deposits in volcanic rocks are Fe-Ni-Cu-(PGE) sulphides associated with Archean and Proterozoic komatiitic lava channels (Lesher, 1989). Komatiitehosted ores contain ~25% of the world’s nickel sulphide resource (≥ 0.8% Ni), including significant amounts of copper and platinum group elements (Ross and Travis, 1981). Field, experimental, and theoretical...

Introduction: High precision iron isotopic analyzes have proven useful for investigating the distribution of Fe in the protoplanetary disk (Fe is a shortlived isotope that decays into Ni with t1/2=1.49 My) [1]. This stems from the fact that Fe, the most neutron-rich stable isotope of iron is produced together with Fe in AGB-stars and supernovae by neutron capture reactions. The lighter isotopes...

The present investigation deals with the accumulation of heavy metals in fields contaminated with fly ash from a thermal power plant and subsequent uptake in different parts of naturally grown plants. Results revealed that in the contaminated site, the mean level of all the metals (Cd, Zn, Cr, Pb, Cu, Ni, Mn and Fe) in soil and different parts (root and shoots) of plant species were found to be...

NWA 2737, a Martian meteorite from the Chassignite subclass, contains minute amounts (0.010 ± 0.005 vol%) of metal-saturated Fe-Ni sulfides. These latter bear evidence of the strong shock effects documented by abundant Fe nanoparticles and planar defects in Northwest Africa (NWA) 2737 olivine. A Ni-poor troilite (Fe ⁄S = 1.0 ± 0.01), sometimes Cr-bearing (up to 1 wt%), coexists with micrometer-...

Resource-efficient manufacturing with a high degree of freedom in terms component shape can be realised through additive manufacturing. The focus lie not only on the process geometrical correctness, stability, etc., but also targeted development specific material properties. This study shows hybrid systems made aluminium and ferromagnetic particles iron, cobalt, nickel. aim is to use properties...

In an attempt to control the film composition, factors affecting the composition of Ni-Fe alloy deposits and their crystal structure have been analyzed as a function of bath composition, cathode current density, bath pH, temperature and an addition of citric acid. antimony electrode revealed that the deposition potential of Fe coincides with the potential where the abrupt increase of pH was obs...